/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/geo1-u_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:44:49,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:44:49,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:44:49,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:44:49,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:44:49,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:44:49,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:44:49,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:44:49,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:44:49,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:44:49,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:44:49,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:44:49,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:44:49,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:44:49,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:44:49,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:44:49,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:44:49,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:44:49,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:44:49,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:44:49,372 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 02:44:49,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:44:49,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:44:49,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:44:49,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:44:49,419 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:44:49,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:44:49,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:44:49,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:44:49,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:44:49,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:44:49,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:44:49,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:44:49,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:44:49,422 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:44:49,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:44:49,422 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:44:49,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:44:49,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:44:49,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:44:49,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:44:49,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:44:49,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:44:49,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:44:49,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:44:49,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:44:49,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:44:49,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:44:49,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:44:49,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:44:49,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:44:49,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:44:49,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:44:49,799 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:44:49,800 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:44:49,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound1.c [2021-05-06 02:44:49,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/866eab04d/2751d3ccde974160883d7f58c237a3a9/FLAG8ebae7174 [2021-05-06 02:44:50,275 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:44:50,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound1.c [2021-05-06 02:44:50,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/866eab04d/2751d3ccde974160883d7f58c237a3a9/FLAG8ebae7174 [2021-05-06 02:44:50,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/866eab04d/2751d3ccde974160883d7f58c237a3a9 [2021-05-06 02:44:50,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:44:50,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:44:50,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:44:50,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:44:50,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:44:50,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:44:50" (1/1) ... [2021-05-06 02:44:50,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cb240bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50, skipping insertion in model container [2021-05-06 02:44:50,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:44:50" (1/1) ... [2021-05-06 02:44:50,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:44:50,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:44:50,468 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/geo1-u_unwindbound1.c[563,576] [2021-05-06 02:44:50,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:44:50,490 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:44:50,502 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/geo1-u_unwindbound1.c[563,576] [2021-05-06 02:44:50,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:44:50,526 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:44:50,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50 WrapperNode [2021-05-06 02:44:50,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:44:50,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:44:50,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:44:50,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:44:50,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50" (1/1) ... [2021-05-06 02:44:50,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50" (1/1) ... [2021-05-06 02:44:50,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50" (1/1) ... [2021-05-06 02:44:50,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50" (1/1) ... [2021-05-06 02:44:50,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50" (1/1) ... [2021-05-06 02:44:50,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50" (1/1) ... [2021-05-06 02:44:50,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50" (1/1) ... [2021-05-06 02:44:50,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:44:50,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:44:50,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:44:50,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:44:50,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50" (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 02:44:50,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:44:50,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:44:50,669 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:44:50,669 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:44:50,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:44:50,669 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:44:50,669 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:44:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:44:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:44:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:44:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 02:44:50,670 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:44:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:44:50,671 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:44:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:44:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:44:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:44:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:44:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:44:50,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:44:50,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:44:50,867 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:44:50,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:44:50 BoogieIcfgContainer [2021-05-06 02:44:50,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:44:50,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:44:50,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:44:50,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:44:50,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:44:50" (1/3) ... [2021-05-06 02:44:50,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a085866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:44:50, skipping insertion in model container [2021-05-06 02:44:50,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:50" (2/3) ... [2021-05-06 02:44:50,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a085866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:44:50, skipping insertion in model container [2021-05-06 02:44:50,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:44:50" (3/3) ... [2021-05-06 02:44:50,875 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-u_unwindbound1.c [2021-05-06 02:44:50,879 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:44:50,882 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:44:50,895 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:44:50,911 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:44:50,911 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:44:50,912 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:44:50,912 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:44:50,912 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:44:50,912 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:44:50,912 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:44:50,912 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:44:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:44:50,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:44:50,927 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:50,927 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:50,928 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1864317590, now seen corresponding path program 1 times [2021-05-06 02:44:50,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:50,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646402111] [2021-05-06 02:44:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:51,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:44:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:51,093 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 02:44:51,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:51,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646402111] [2021-05-06 02:44:51,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646402111] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:51,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:51,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:44:51,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773060400] [2021-05-06 02:44:51,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:44:51,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:51,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:44:51,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:44:51,109 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 02:44:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:51,182 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-05-06 02:44:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:44:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-06 02:44:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:51,189 INFO L225 Difference]: With dead ends: 41 [2021-05-06 02:44:51,189 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 02:44:51,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:44:51,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 02:44:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-06 02:44:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:44:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-06 02:44:51,219 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-05-06 02:44:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:51,220 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-06 02:44:51,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 02:44:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-06 02:44:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:44:51,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:51,221 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:51,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:44:51,221 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:51,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2049175951, now seen corresponding path program 1 times [2021-05-06 02:44:51,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:51,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240756149] [2021-05-06 02:44:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:51,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:51,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084351343] [2021-05-06 02:44:51,239 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 02:44:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:51,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:44:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:51,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:51,450 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 02:44:51,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:51,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240756149] [2021-05-06 02:44:51,450 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:51,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084351343] [2021-05-06 02:44:51,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084351343] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:51,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:51,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:44:51,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213178429] [2021-05-06 02:44:51,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:44:51,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:51,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:44:51,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:44:51,453 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 02:44:51,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:51,487 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-05-06 02:44:51,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:44:51,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 02:44:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:51,488 INFO L225 Difference]: With dead ends: 29 [2021-05-06 02:44:51,488 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 02:44:51,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:44:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 02:44:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-05-06 02:44:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:44:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 02:44:51,495 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 12 [2021-05-06 02:44:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:51,495 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 02:44:51,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 02:44:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 02:44:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 02:44:51,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:51,496 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:51,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:44:51,711 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:51,712 INFO L82 PathProgramCache]: Analyzing trace with hash -975399299, now seen corresponding path program 1 times [2021-05-06 02:44:51,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:51,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008054350] [2021-05-06 02:44:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:51,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:51,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326303037] [2021-05-06 02:44:51,727 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 02:44:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:51,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:44:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:51,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:51,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:51,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:51,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:51,850 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 02:44:51,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:51,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008054350] [2021-05-06 02:44:51,851 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:51,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326303037] [2021-05-06 02:44:51,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326303037] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:51,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:51,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:44:51,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565476970] [2021-05-06 02:44:51,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:44:51,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:51,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:44:51,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:44:51,853 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 02:44:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:51,864 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-05-06 02:44:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:44:51,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2021-05-06 02:44:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:51,866 INFO L225 Difference]: With dead ends: 33 [2021-05-06 02:44:51,866 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 02:44:51,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:44:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 02:44:51,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 02:44:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:44:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 02:44:51,872 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2021-05-06 02:44:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:51,872 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 02:44:51,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 02:44:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 02:44:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 02:44:51,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:51,873 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:52,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:52,096 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash 198190047, now seen corresponding path program 1 times [2021-05-06 02:44:52,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:52,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442332789] [2021-05-06 02:44:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:52,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:52,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501874815] [2021-05-06 02:44:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:44:52,177 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:44:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:44:52,194 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:44:52,227 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 02:44:52,227 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 02:44:52,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:52,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:44:52 BoogieIcfgContainer [2021-05-06 02:44:52,474 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:44:52,476 INFO L168 Benchmark]: Toolchain (without parser) took 2170.65 ms. Allocated memory is still 184.5 MB. Free memory was 150.1 MB in the beginning and 122.7 MB in the end (delta: 27.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:52,476 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 184.5 MB. Free memory is still 166.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:44:52,477 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.20 ms. Allocated memory is still 184.5 MB. Free memory was 149.9 MB in the beginning and 140.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:52,484 INFO L168 Benchmark]: Boogie Preprocessor took 39.68 ms. Allocated memory is still 184.5 MB. Free memory was 140.2 MB in the beginning and 138.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:52,484 INFO L168 Benchmark]: RCFGBuilder took 298.37 ms. Allocated memory is still 184.5 MB. Free memory was 138.6 MB in the beginning and 154.8 MB in the end (delta: -16.2 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:52,488 INFO L168 Benchmark]: TraceAbstraction took 1604.06 ms. Allocated memory is still 184.5 MB. Free memory was 154.3 MB in the beginning and 122.7 MB in the end (delta: 31.6 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:52,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 184.5 MB. Free memory is still 166.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 220.20 ms. Allocated memory is still 184.5 MB. Free memory was 149.9 MB in the beginning and 140.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.68 ms. Allocated memory is still 184.5 MB. Free memory was 140.2 MB in the beginning and 138.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 298.37 ms. Allocated memory is still 184.5 MB. Free memory was 138.6 MB in the beginning and 154.8 MB in the end (delta: -16.2 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1604.06 ms. Allocated memory is still 184.5 MB. Free memory was 154.3 MB in the beginning and 122.7 MB in the end (delta: 31.6 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=16, counter=0] [L24] unsigned int z, k; [L25] long long x, y, c; [L26] z = __VERIFIER_nondet_unsigned_int() [L27] k = __VERIFIER_nondet_unsigned_int() [L29] x = 1 [L30] y = z [L31] c = 1 VAL [\old(counter)=0, c=1, counter=0, x=1, y=0, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, c=1, counter=1, counter++=0, x=1, y=0, z=0] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert(x*z - x - y + 1 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(x*z - x - y + 1 == 0) VAL [\old(counter)=0, c=1, counter=1, x=1, y=0, z=0] [L36] COND TRUE !(c < k) VAL [\old(counter)=0, c=1, counter=1, k=0, x=1, y=0, z=0] [L45] x = x * (z - 1) VAL [\old(counter)=0, c=1, counter=1, k=0, x=4294967295, y=0, z=0] [L47] CALL __VERIFIER_assert(1 + x - y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=1] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1531.6ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 7.4ms, AutomataDifference: 143.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 13 SDslu, 79 SDs, 0 SdLazy, 41 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=2, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28.3ms AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.3ms SsaConstructionTime, 98.8ms SatisfiabilityAnalysisTime, 267.0ms InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 107 SizeOfPredicates, 2 NumberOfNonLiveVariables, 204 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 proved your program to be incorrect! Received shutdown request...