/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:44:14,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:44:14,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:44:14,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:44:14,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:44:14,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:44:14,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:44:14,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:44:14,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:44:14,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:44:14,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:44:14,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:44:14,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:44:14,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:44:14,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:44:14,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:44:14,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:44:14,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:44:14,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:44:14,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:44:14,565 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:44:14,611 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:44:14,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:44:14,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:44:14,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:44:14,613 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:44:14,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:44:14,614 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:44:14,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:44:14,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:44:14,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:44:14,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:44:14,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:44:14,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:44:14,615 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:44:14,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:44:14,615 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:44:14,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:44:14,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:44:14,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:44:14,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:44:14,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:44:14,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:44:14,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:44:14,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:44:14,616 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:44:14,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:44:14,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:44:14,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:44:14,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:44:14,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:44:14,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:44:14,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:44:14,892 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:44:14,892 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:44:14,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound20.c [2021-05-06 02:44:14,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7046c6322/fc4ca2373531424a8310de9276078932/FLAGb57f952a7 [2021-05-06 02:44:15,295 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:44:15,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound20.c [2021-05-06 02:44:15,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7046c6322/fc4ca2373531424a8310de9276078932/FLAGb57f952a7 [2021-05-06 02:44:15,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7046c6322/fc4ca2373531424a8310de9276078932 [2021-05-06 02:44:15,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:44:15,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:44:15,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:44:15,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:44:15,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:44:15,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:44:15" (1/1) ... [2021-05-06 02:44:15,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9fe363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15, skipping insertion in model container [2021-05-06 02:44:15,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:44:15" (1/1) ... [2021-05-06 02:44:15,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:44:15,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:44:15,459 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/freire2_unwindbound20.c[709,722] [2021-05-06 02:44:15,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:44:15,494 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:44:15,541 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/freire2_unwindbound20.c[709,722] [2021-05-06 02:44:15,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:44:15,570 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:44:15,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15 WrapperNode [2021-05-06 02:44:15,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:44:15,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:44:15,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:44:15,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:44:15,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15" (1/1) ... [2021-05-06 02:44:15,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15" (1/1) ... [2021-05-06 02:44:15,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15" (1/1) ... [2021-05-06 02:44:15,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15" (1/1) ... [2021-05-06 02:44:15,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15" (1/1) ... [2021-05-06 02:44:15,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15" (1/1) ... [2021-05-06 02:44:15,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15" (1/1) ... [2021-05-06 02:44:15,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:44:15,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:44:15,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:44:15,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:44:15,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15" (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 02:44:15,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:44:15,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:44:15,661 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:44:15,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:44:15,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:44:15,661 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:44:15,661 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:44:15,662 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:44:15,662 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:44:15,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:44:15,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-05-06 02:44:15,663 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:44:15,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:44:15,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:44:15,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:44:15,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:44:15,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:44:15,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:44:15,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:44:15,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:44:15,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:44:15,830 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:44:15,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:44:15 BoogieIcfgContainer [2021-05-06 02:44:15,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:44:15,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:44:15,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:44:15,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:44:15,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:44:15" (1/3) ... [2021-05-06 02:44:15,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295e9874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:44:15, skipping insertion in model container [2021-05-06 02:44:15,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:15" (2/3) ... [2021-05-06 02:44:15,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295e9874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:44:15, skipping insertion in model container [2021-05-06 02:44:15,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:44:15" (3/3) ... [2021-05-06 02:44:15,835 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2021-05-06 02:44:15,838 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:44:15,840 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:44:15,849 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:44:15,861 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:44:15,861 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:44:15,861 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:44:15,862 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:44:15,862 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:44:15,862 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:44:15,862 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:44:15,862 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:44:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 02:44:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 02:44:15,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:15,873 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:15,873 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-05-06 02:44:15,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:15,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513224796] [2021-05-06 02:44:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:16,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:44:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:44:16,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:16,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513224796] [2021-05-06 02:44:16,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513224796] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:16,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:16,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:44:16,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369168996] [2021-05-06 02:44:16,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:44:16,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:16,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:44:16,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:44:16,036 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:44:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:16,100 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-05-06 02:44:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:44:16,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 02:44:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:16,106 INFO L225 Difference]: With dead ends: 47 [2021-05-06 02:44:16,106 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 02:44:16,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:44:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 02:44:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 02:44:16,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:44:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-06 02:44:16,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-06 02:44:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:16,132 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-06 02:44:16,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:44:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-06 02:44:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:44:16,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:16,133 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:16,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:44:16,133 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:16,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:16,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-05-06 02:44:16,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:16,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128625305] [2021-05-06 02:44:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:16,147 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:16,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313628998] [2021-05-06 02:44:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:16,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:44:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:16,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:44:16,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:16,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128625305] [2021-05-06 02:44:16,300 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:16,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313628998] [2021-05-06 02:44:16,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313628998] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:16,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:16,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:44:16,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012434564] [2021-05-06 02:44:16,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:44:16,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:16,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:44:16,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:44:16,307 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:44:16,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:16,321 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-05-06 02:44:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:44:16,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 02:44:16,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:16,323 INFO L225 Difference]: With dead ends: 32 [2021-05-06 02:44:16,323 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 02:44:16,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:44:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 02:44:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 02:44:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:44:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-06 02:44:16,335 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-06 02:44:16,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:16,336 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-06 02:44:16,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:44:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-06 02:44:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:44:16,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:16,338 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:16,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:44:16,556 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:16,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:16,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2021-05-06 02:44:16,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:16,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315850095] [2021-05-06 02:44:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:16,565 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:16,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037219689] [2021-05-06 02:44:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:44:16,662 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:44:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:44:16,672 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:44:16,691 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 02:44:16,691 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 02:44:16,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:16,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:44:16 BoogieIcfgContainer [2021-05-06 02:44:16,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:44:16,929 INFO L168 Benchmark]: Toolchain (without parser) took 1605.56 ms. Allocated memory is still 201.3 MB. Free memory was 166.2 MB in the beginning and 154.0 MB in the end (delta: 12.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:16,929 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 201.3 MB. Free memory is still 182.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:44:16,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.90 ms. Allocated memory is still 201.3 MB. Free memory was 166.0 MB in the beginning and 183.5 MB in the end (delta: -17.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:16,930 INFO L168 Benchmark]: Boogie Preprocessor took 35.65 ms. Allocated memory is still 201.3 MB. Free memory was 183.5 MB in the beginning and 182.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:16,930 INFO L168 Benchmark]: RCFGBuilder took 223.63 ms. Allocated memory is still 201.3 MB. Free memory was 182.1 MB in the beginning and 167.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:16,930 INFO L168 Benchmark]: TraceAbstraction took 1094.49 ms. Allocated memory is still 201.3 MB. Free memory was 166.7 MB in the beginning and 154.0 MB in the end (delta: 12.7 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:16,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 201.3 MB. Free memory is still 182.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.90 ms. Allocated memory is still 201.3 MB. Free memory was 166.0 MB in the beginning and 183.5 MB in the end (delta: -17.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.65 ms. Allocated memory is still 201.3 MB. Free memory was 183.5 MB in the beginning and 182.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 223.63 ms. Allocated memory is still 201.3 MB. Free memory was 182.1 MB in the beginning and 167.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1094.49 ms. Allocated memory is still 201.3 MB. Free memory was 166.7 MB in the beginning and 154.0 MB in the end (delta: 12.7 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; VAL [\old(counter)=7, counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [\old(counter)=0, a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0, \old(counter)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1050.2ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 5.8ms, AutomataDifference: 101.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 55 SDtfs, 6 SDslu, 48 SDs, 0 SdLazy, 23 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 39.0ms SsaConstructionTime, 47.6ms SatisfiabilityAnalysisTime, 167.9ms InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 66 SizeOfPredicates, 1 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...