/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/bresenham-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 01:23:19,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 01:23:19,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 01:23:19,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 01:23:19,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 01:23:19,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 01:23:19,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 01:23:19,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 01:23:19,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 01:23:19,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 01:23:19,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 01:23:19,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 01:23:19,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 01:23:19,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 01:23:19,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 01:23:19,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 01:23:19,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 01:23:19,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 01:23:19,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 01:23:19,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 01:23:19,569 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 01:23:19,595 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 01:23:19,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 01:23:19,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 01:23:19,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 01:23:19,598 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 01:23:19,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 01:23:19,598 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 01:23:19,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 01:23:19,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 01:23:19,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 01:23:19,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 01:23:19,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 01:23:19,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 01:23:19,600 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 01:23:19,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 01:23:19,600 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 01:23:19,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 01:23:19,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 01:23:19,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 01:23:19,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 01:23:19,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:23:19,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 01:23:19,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 01:23:19,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 01:23:19,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 01:23:19,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 01:23:19,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 01:23:19,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 01:23:19,601 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 01:23:19,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 01:23:19,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 01:23:19,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 01:23:19,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 01:23:19,849 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 01:23:19,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound1.c [2021-05-06 01:23:19,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff0d99e30/7ede7a25416d429e9a5f5c8c299fc337/FLAGe048a88f7 [2021-05-06 01:23:20,277 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 01:23:20,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound1.c [2021-05-06 01:23:20,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff0d99e30/7ede7a25416d429e9a5f5c8c299fc337/FLAGe048a88f7 [2021-05-06 01:23:20,647 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff0d99e30/7ede7a25416d429e9a5f5c8c299fc337 [2021-05-06 01:23:20,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 01:23:20,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 01:23:20,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 01:23:20,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 01:23:20,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 01:23:20,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:23:20" (1/1) ... [2021-05-06 01:23:20,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f978b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20, skipping insertion in model container [2021-05-06 01:23:20,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:23:20" (1/1) ... [2021-05-06 01:23:20,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 01:23:20,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 01:23:20,783 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/bresenham-ll_unwindbound1.c[597,610] [2021-05-06 01:23:20,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:23:20,802 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 01:23:20,849 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/bresenham-ll_unwindbound1.c[597,610] [2021-05-06 01:23:20,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:23:20,862 INFO L208 MainTranslator]: Completed translation [2021-05-06 01:23:20,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20 WrapperNode [2021-05-06 01:23:20,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 01:23:20,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 01:23:20,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 01:23:20,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 01:23:20,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20" (1/1) ... [2021-05-06 01:23:20,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20" (1/1) ... [2021-05-06 01:23:20,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20" (1/1) ... [2021-05-06 01:23:20,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20" (1/1) ... [2021-05-06 01:23:20,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20" (1/1) ... [2021-05-06 01:23:20,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20" (1/1) ... [2021-05-06 01:23:20,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20" (1/1) ... [2021-05-06 01:23:20,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 01:23:20,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 01:23:20,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 01:23:20,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 01:23:20,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20" (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 01:23:20,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 01:23:20,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 01:23:20,946 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 01:23:20,946 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 01:23:20,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 01:23:20,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 01:23:20,947 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 01:23:20,947 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 01:23:20,947 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 01:23:20,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 01:23:21,102 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 01:23:21,102 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 01:23:21,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:23:21 BoogieIcfgContainer [2021-05-06 01:23:21,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 01:23:21,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 01:23:21,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 01:23:21,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 01:23:21,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 01:23:20" (1/3) ... [2021-05-06 01:23:21,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bb21b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:23:21, skipping insertion in model container [2021-05-06 01:23:21,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:23:20" (2/3) ... [2021-05-06 01:23:21,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30bb21b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:23:21, skipping insertion in model container [2021-05-06 01:23:21,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:23:21" (3/3) ... [2021-05-06 01:23:21,108 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound1.c [2021-05-06 01:23:21,111 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 01:23:21,114 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 01:23:21,125 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 01:23:21,139 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 01:23:21,139 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 01:23:21,139 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 01:23:21,139 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 01:23:21,139 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 01:23:21,139 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 01:23:21,139 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 01:23:21,139 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 01:23:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 01:23:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 01:23:21,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:21,152 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:21,152 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:21,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2021-05-06 01:23:21,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:21,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938896790] [2021-05-06 01:23:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:21,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:23:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:21,367 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 01:23:21,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:21,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938896790] [2021-05-06 01:23:21,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938896790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:23:21,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:23:21,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:23:21,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059778530] [2021-05-06 01:23:21,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:23:21,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:21,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:23:21,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:23:21,388 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 01:23:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:21,462 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-05-06 01:23:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:23:21,463 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 01:23:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:21,468 INFO L225 Difference]: With dead ends: 45 [2021-05-06 01:23:21,468 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 01:23:21,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:23:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 01:23:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-06 01:23:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 01:23:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 01:23:21,501 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 01:23:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:21,501 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 01:23:21,502 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 01:23:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 01:23:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 01:23:21,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:21,503 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:21,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 01:23:21,503 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2021-05-06 01:23:21,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:21,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931196347] [2021-05-06 01:23:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:21,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:21,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141277469] [2021-05-06 01:23:21,518 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 01:23:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:21,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 01:23:21,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:23:21,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:21,666 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 01:23:21,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:21,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931196347] [2021-05-06 01:23:21,667 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:23:21,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141277469] [2021-05-06 01:23:21,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141277469] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:23:21,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:23:21,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 01:23:21,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847696140] [2021-05-06 01:23:21,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:23:21,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:23:21,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:23:21,669 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 01:23:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:21,723 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 01:23:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:23:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 01:23:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:21,725 INFO L225 Difference]: With dead ends: 34 [2021-05-06 01:23:21,725 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 01:23:21,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:23:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 01:23:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 01:23:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:23:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 01:23:21,730 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-05-06 01:23:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:21,730 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 01:23:21,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 01:23:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 01:23:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 01:23:21,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:21,731 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:21,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 01:23:21,953 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:21,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2021-05-06 01:23:21,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:21,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801505703] [2021-05-06 01:23:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:21,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:21,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420646092] [2021-05-06 01:23:21,965 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 01:23:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:23:22,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:23:22,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:22,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:22,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:22,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:22,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:22,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:22,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:22,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:23:22,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:22,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801505703] [2021-05-06 01:23:22,116 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:23:22,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420646092] [2021-05-06 01:23:22,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420646092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:23:22,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:23:22,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 01:23:22,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23428760] [2021-05-06 01:23:22,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:23:22,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:23:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:23:22,132 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (4), 4 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 01:23:22,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:22,164 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-05-06 01:23:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 01:23:22,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 01:23:22,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:22,165 INFO L225 Difference]: With dead ends: 40 [2021-05-06 01:23:22,165 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 01:23:22,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:23:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 01:23:22,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 01:23:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 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 01:23:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-06 01:23:22,168 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-05-06 01:23:22,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:22,169 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-06 01:23:22,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (4), 4 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 01:23:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-06 01:23:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 01:23:22,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:22,169 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:22,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:22,385 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:22,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1893873077, now seen corresponding path program 1 times [2021-05-06 01:23:22,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:22,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286078635] [2021-05-06 01:23:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:22,412 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:22,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356869239] [2021-05-06 01:23:22,413 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 01:23:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:23:22,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 01:23:22,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:23:22,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:23:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:23:22,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:23:22,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286078635] [2021-05-06 01:23:22,604 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:23:22,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356869239] [2021-05-06 01:23:22,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356869239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:23:22,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:23:22,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:23:22,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456667575] [2021-05-06 01:23:22,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:23:22,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:23:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:23:22,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:23:22,605 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:23:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:23:22,659 INFO L93 Difference]: Finished difference Result 33 states and 32 transitions. [2021-05-06 01:23:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:23:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-05-06 01:23:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:23:22,660 INFO L225 Difference]: With dead ends: 33 [2021-05-06 01:23:22,660 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 01:23:22,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:23:22,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 01:23:22,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 01:23:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 4 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 01:23:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2021-05-06 01:23:22,663 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 23 [2021-05-06 01:23:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:23:22,663 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2021-05-06 01:23:22,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:23:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2021-05-06 01:23:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 01:23:22,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:23:22,664 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:23:22,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:22,883 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:23:22,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:23:22,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2021-05-06 01:23:22,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:23:22,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317030185] [2021-05-06 01:23:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:23:22,892 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:23:22,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341250643] [2021-05-06 01:23:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 01:23:22,966 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 01:23:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 01:23:22,980 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 01:23:23,006 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 01:23:23,007 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 01:23:23,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:23:23,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 01:23:23 BoogieIcfgContainer [2021-05-06 01:23:23,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 01:23:23,237 INFO L168 Benchmark]: Toolchain (without parser) took 2587.56 ms. Allocated memory is still 185.6 MB. Free memory was 149.3 MB in the beginning and 99.9 MB in the end (delta: 49.4 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. [2021-05-06 01:23:23,237 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 185.6 MB. Free memory is still 165.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 01:23:23,238 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.75 ms. Allocated memory is still 185.6 MB. Free memory was 149.0 MB in the beginning and 168.5 MB in the end (delta: -19.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-06 01:23:23,238 INFO L168 Benchmark]: Boogie Preprocessor took 20.69 ms. Allocated memory is still 185.6 MB. Free memory was 168.5 MB in the beginning and 166.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 01:23:23,238 INFO L168 Benchmark]: RCFGBuilder took 216.96 ms. Allocated memory is still 185.6 MB. Free memory was 166.9 MB in the beginning and 150.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 01:23:23,238 INFO L168 Benchmark]: TraceAbstraction took 2132.79 ms. Allocated memory is still 185.6 MB. Free memory was 150.1 MB in the beginning and 99.9 MB in the end (delta: 50.2 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. [2021-05-06 01:23:23,238 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 185.6 MB. Free memory is still 165.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 210.75 ms. Allocated memory is still 185.6 MB. Free memory was 149.0 MB in the beginning and 168.5 MB in the end (delta: -19.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.69 ms. Allocated memory is still 185.6 MB. Free memory was 168.5 MB in the beginning and 166.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 216.96 ms. Allocated memory is still 185.6 MB. Free memory was 166.9 MB in the beginning and 150.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2132.79 ms. Allocated memory is still 185.6 MB. Free memory was 150.1 MB in the beginning and 99.9 MB in the end (delta: 50.2 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [\old(counter)=16, counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [\old(counter)=0, counter=0, v=0, X=4, x=0, Y=2, y=0] [L31] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, v=0, x=0, X=4, y=0, Y=2] [L31] COND TRUE counter++<1 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [\old(counter)=0, counter=1, v=0, x=0, x=0, x=0, X=4, Y=2, y=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(counter)=0, counter=1, v=0, x=0, x=0, x=0, X=4, y=0, Y=2] [L35] COND FALSE !(!(x <= X)) VAL [\old(counter)=0, counter=1, v=0, X=4, x=0, x=0, x=0, Y=2, y=0] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [\old(counter)=0, counter=1, v=-4, X=4, x=0, x=0, x=0, y=1, Y=2] [L45] x++ VAL [\old(counter)=0, counter=1, v=-4, X=4, x=0, x=1, x=0, y=1, Y=2] [L31] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, v=-4, X=4, x=0, x=0, x=1, Y=2, y=1] [L31] COND FALSE !(counter++<1) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x VAL [\old(counter)=0, counter=2, v=-4, x=1, X=4, x=1, x=2, Y=2, y=1] [L49] CALL __VERIFIER_assert(2*yx - 2*xy - X + (long long) 2*Y - v + 2*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L14] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L16] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2079.9ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 6.9ms, AutomataDifference: 245.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 78 SDtfs, 36 SDslu, 167 SDs, 0 SdLazy, 131 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 102.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 159.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 29.8ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 34.9ms SsaConstructionTime, 86.5ms SatisfiabilityAnalysisTime, 451.7ms InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 65 ConstructedInterpolants, 0 QuantifiedInterpolants, 310 SizeOfPredicates, 7 NumberOfNonLiveVariables, 387 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 6/9 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...