/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/geo2-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:21:54,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:21:54,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:21:54,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:21:54,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:21:54,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:21:54,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:21:54,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:21:54,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:21:54,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:21:54,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:21:54,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:21:54,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:21:54,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:21:54,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:21:54,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:21:54,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:21:54,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:21:54,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:21:54,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:21:54,741 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 [2021-05-02 15:21:54,757 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:21:54,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:21:54,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:21:54,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:21:54,758 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:21:54,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:21:54,759 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:21:54,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:21:54,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:21:54,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:21:54,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:21:54,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:21:54,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:21:54,759 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:21:54,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:21:54,760 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:21:54,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:21:54,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:21:54,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:21:54,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:21:54,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:21:54,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:21:54,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:21:54,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:21:54,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:21:54,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:21:54,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:21:54,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:21:54,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:21:55,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:21:55,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:21:55,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:21:55,034 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:21:55,034 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:21:55,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound2.c [2021-05-02 15:21:55,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a77f984/b3adf2c6c3ae4dd5afec7a5396a8907c/FLAG12d4ed8e3 [2021-05-02 15:21:55,448 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:21:55,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound2.c [2021-05-02 15:21:55,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a77f984/b3adf2c6c3ae4dd5afec7a5396a8907c/FLAG12d4ed8e3 [2021-05-02 15:21:55,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a77f984/b3adf2c6c3ae4dd5afec7a5396a8907c [2021-05-02 15:21:55,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:21:55,472 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:21:55,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:21:55,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:21:55,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:21:55,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:21:55" (1/1) ... [2021-05-02 15:21:55,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24649450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55, skipping insertion in model container [2021-05-02 15:21:55,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:21:55" (1/1) ... [2021-05-02 15:21:55,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:21:55,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:21:55,606 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/geo2-ll_unwindbound2.c[525,538] [2021-05-02 15:21:55,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:21:55,628 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:21:55,637 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/geo2-ll_unwindbound2.c[525,538] [2021-05-02 15:21:55,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:21:55,656 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:21:55,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55 WrapperNode [2021-05-02 15:21:55,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:21:55,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:21:55,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:21:55,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:21:55,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55" (1/1) ... [2021-05-02 15:21:55,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55" (1/1) ... [2021-05-02 15:21:55,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55" (1/1) ... [2021-05-02 15:21:55,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55" (1/1) ... [2021-05-02 15:21:55,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55" (1/1) ... [2021-05-02 15:21:55,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55" (1/1) ... [2021-05-02 15:21:55,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55" (1/1) ... [2021-05-02 15:21:55,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:21:55,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:21:55,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:21:55,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:21:55,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55" (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 [2021-05-02 15:21:55,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:21:55,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:21:55,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:21:55,805 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:21:55,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:21:55,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:21:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:21:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:21:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:21:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:21:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:21:55,807 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:21:55,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:21:55,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:21:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:21:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:21:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:21:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:21:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:21:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:21:55,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:21:55,973 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:21:55,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:21:55 BoogieIcfgContainer [2021-05-02 15:21:55,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:21:55,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:21:55,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:21:55,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:21:55,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:21:55" (1/3) ... [2021-05-02 15:21:55,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234fb524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:21:55, skipping insertion in model container [2021-05-02 15:21:55,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:55" (2/3) ... [2021-05-02 15:21:55,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234fb524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:21:55, skipping insertion in model container [2021-05-02 15:21:55,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:21:55" (3/3) ... [2021-05-02 15:21:55,979 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound2.c [2021-05-02 15:21:55,990 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:21:55,993 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:21:56,004 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:21:56,026 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:21:56,027 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:21:56,027 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:21:56,027 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:21:56,027 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:21:56,027 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:21:56,027 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:21:56,027 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:21:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-05-02 15:21:56,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 15:21:56,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:56,044 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:56,044 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:56,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-02 15:21:56,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:56,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424160666] [2021-05-02 15:21:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:56,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:21:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:21:56,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:56,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424160666] [2021-05-02 15:21:56,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424160666] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:21:56,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:21:56,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:21:56,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945680267] [2021-05-02 15:21:56,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:21:56,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:56,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:21:56,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:21:56,292 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:21:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:56,359 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-02 15:21:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:21:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 15:21:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:56,366 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:21:56,367 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 15:21:56,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:21:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 15:21:56,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 15:21:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-05-02 15:21:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 15:21:56,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 15:21:56,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:56,398 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 15:21:56,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:21:56,398 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 15:21:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:21:56,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:56,399 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:56,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:21:56,400 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:56,400 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-02 15:21:56,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:56,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57120002] [2021-05-02 15:21:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:56,432 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:56,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818152579] [2021-05-02 15:21:56,433 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 [2021-05-02 15:21:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:56,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:21:56,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:56,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:56,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:56,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:56,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:56,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:21:56,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:56,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57120002] [2021-05-02 15:21:56,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:56,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818152579] [2021-05-02 15:21:56,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818152579] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:21:56,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:21:56,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:21:56,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33678852] [2021-05-02 15:21:56,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:21:56,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:56,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:21:56,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:21:56,588 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:21:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:56,601 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 15:21:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:21:56,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:21:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:56,603 INFO L225 Difference]: With dead ends: 26 [2021-05-02 15:21:56,604 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 15:21:56,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:21:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 15:21:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 15:21:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-05-02 15:21:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 15:21:56,617 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 15:21:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:56,619 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 15:21:56,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:21:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 15:21:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:21:56,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:56,621 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:56,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:21:56,822 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:56,823 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-02 15:21:56,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:56,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578466507] [2021-05-02 15:21:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:56,831 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:56,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924589506] [2021-05-02 15:21:56,831 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 [2021-05-02 15:21:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:56,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 15:21:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:21:56,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:56,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578466507] [2021-05-02 15:21:56,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:56,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924589506] [2021-05-02 15:21:56,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924589506] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:21:56,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:21:56,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:21:56,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339990661] [2021-05-02 15:21:56,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:21:56,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:56,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:21:56,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:21:56,902 INFO L87 Difference]: Start difference. First operand 19 states and 21 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) [2021-05-02 15:21:56,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:56,922 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 15:21:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:21:56,922 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 [2021-05-02 15:21:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:56,923 INFO L225 Difference]: With dead ends: 28 [2021-05-02 15:21:56,923 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 15:21:56,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:21:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 15:21:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 15:21:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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) [2021-05-02 15:21:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 15:21:56,927 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 15:21:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:56,927 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 15:21:56,927 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) [2021-05-02 15:21:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 15:21:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:21:56,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:56,928 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:57,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:57,147 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-02 15:21:57,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:57,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70409052] [2021-05-02 15:21:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:57,155 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:57,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552490968] [2021-05-02 15:21:57,155 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 [2021-05-02 15:21:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:57,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:21:57,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:57,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:57,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:57,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:57,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:57,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:57,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:57,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:57,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:21:57,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:57,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70409052] [2021-05-02 15:21:57,272 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:57,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552490968] [2021-05-02 15:21:57,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552490968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:57,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:57,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:21:57,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096623231] [2021-05-02 15:21:57,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:21:57,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:57,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:21:57,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:21:57,273 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-05-02 15:21:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:57,295 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-02 15:21:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:21:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 20 [2021-05-02 15:21:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:57,296 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:21:57,297 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:21:57,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:21:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:21:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:21:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-05-02 15:21:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 15:21:57,301 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 15:21:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:57,301 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 15:21:57,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-05-02 15:21:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 15:21:57,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:21:57,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:57,301 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:57,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:57,519 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:57,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-02 15:21:57,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:57,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430537169] [2021-05-02 15:21:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:57,526 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:57,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534381203] [2021-05-02 15:21:57,526 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 [2021-05-02 15:21:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:57,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:21:57,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:57,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:57,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:21:57,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430537169] [2021-05-02 15:21:57,661 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534381203] [2021-05-02 15:21:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534381203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:57,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:57,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:21:57,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180542880] [2021-05-02 15:21:57,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:21:57,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:21:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:21:57,662 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:21:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:57,778 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 15:21:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:21:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 20 [2021-05-02 15:21:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:57,794 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:21:57,794 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:21:57,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:21:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:21:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:21:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:21:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 15:21:57,800 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 15:21:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:57,800 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 15:21:57,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:21:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 15:21:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:21:57,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:57,801 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:58,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:58,013 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:58,013 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-02 15:21:58,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:58,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833226287] [2021-05-02 15:21:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:58,020 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:58,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047693175] [2021-05-02 15:21:58,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:58,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:21:58,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:21:58,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:21:58,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:22:06,231 WARN L205 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 13 [2021-05-02 15:22:06,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:06,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:22:06,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:22:06,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833226287] [2021-05-02 15:22:06,282 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:22:06,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047693175] [2021-05-02 15:22:06,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047693175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:22:06,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:22:06,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:22:06,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139600608] [2021-05-02 15:22:06,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:22:06,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:22:06,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:22:06,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-05-02 15:22:06,283 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:22:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:22:24,573 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-02 15:22:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:22:24,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:22:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:22:24,575 INFO L225 Difference]: With dead ends: 44 [2021-05-02 15:22:24,575 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 15:22:24,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 8164.4ms TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2021-05-02 15:22:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 15:22:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 15:22:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:22:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-05-02 15:22:24,580 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 28 [2021-05-02 15:22:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:22:24,580 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-05-02 15:22:24,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:22:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-05-02 15:22:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:22:24,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:22:24,581 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:22:24,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:22:24,791 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:22:24,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:22:24,791 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-02 15:22:24,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:22:24,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076549923] [2021-05-02 15:22:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:22:24,800 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:22:24,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154111035] [2021-05-02 15:22:24,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:22:24,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:22:24,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:22:24,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:22:24,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:22:24,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:22:24,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:22:24,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076549923] [2021-05-02 15:22:24,941 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:22:24,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154111035] [2021-05-02 15:22:24,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154111035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:22:24,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:22:24,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:22:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302088697] [2021-05-02 15:22:24,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:22:24,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:22:24,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:22:24,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:22:24,944 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:22:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:22:24,969 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-05-02 15:22:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:22:24,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:22:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:22:24,970 INFO L225 Difference]: With dead ends: 37 [2021-05-02 15:22:24,971 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:22:24,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:22:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:22:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:22:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 15:22:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:22:24,972 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-05-02 15:22:24,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:22:24,972 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:22:24,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:22:24,972 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:22:24,972 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:22:25,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:22:25,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:22:25,340 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:22:25,340 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:22:25,340 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:22:25,340 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:22:25,342 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:22:25,342 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:22:25,342 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:22:25,342 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~counter~0 0) (<= 0 ~counter~0)) [2021-05-02 15:22:25,342 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:22:25,343 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:22:25,343 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:22:25,343 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:22:25,343 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:22:25,343 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:22:25,343 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:22:25,343 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 43) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (let ((.cse0 (* main_~z~0 main_~z~0))) (and (= main_~x~0 (+ .cse0 main_~z~0 1)) (<= 2 ~counter~0) (= main_~y~0 .cse0))) (and (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~x~0 (+ main_~z~0 1)) (= main_~z~0 main_~y~0)) (not (<= 0 |old(~counter~0)|)) (and (= main_~y~0 1) (<= ~counter~0 0) (<= 0 ~counter~0) (= main_~x~0 1))) [2021-05-02 15:22:25,343 INFO L194 CegarLoopUtils]: At program point L34-4(lines 34 43) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~y~0 1) (= main_~x~0 1)) (let ((.cse0 (* main_~z~0 main_~z~0))) (and (= main_~x~0 (+ .cse0 main_~z~0 1)) (= main_~y~0 .cse0))) (not (<= 0 |old(~counter~0)|)) (and (= main_~x~0 (+ main_~z~0 1)) (= main_~z~0 main_~y~0))) [2021-05-02 15:22:25,343 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 24 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:22:25,343 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 46) no Hoare annotation was computed. [2021-05-02 15:22:25,343 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 46) no Hoare annotation was computed. [2021-05-02 15:22:25,343 INFO L198 CegarLoopUtils]: For program point L44(line 44) no Hoare annotation was computed. [2021-05-02 15:22:25,343 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (or (and (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~y~0 1) (= main_~x~0 1)) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (and (= main_~x~0 (+ main_~z~0 1)) (<= 2 ~counter~0) (= main_~z~0 main_~y~0))) [2021-05-02 15:22:25,343 INFO L198 CegarLoopUtils]: For program point L35-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:22:25,344 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:22:25,344 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:22:25,344 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:22:25,344 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:22:25,344 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:22:25,344 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:22:25,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:22:25 BoogieIcfgContainer [2021-05-02 15:22:25,354 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:22:25,355 INFO L168 Benchmark]: Toolchain (without parser) took 29883.00 ms. Allocated memory was 205.5 MB in the beginning and 284.2 MB in the end (delta: 78.6 MB). Free memory was 169.5 MB in the beginning and 227.4 MB in the end (delta: -57.8 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:22:25,355 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 205.5 MB. Free memory was 186.6 MB in the beginning and 186.5 MB in the end (delta: 101.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:22:25,355 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.75 ms. Allocated memory is still 205.5 MB. Free memory was 169.4 MB in the beginning and 159.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:22:25,355 INFO L168 Benchmark]: Boogie Preprocessor took 33.22 ms. Allocated memory is still 205.5 MB. Free memory was 159.6 MB in the beginning and 158.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:22:25,355 INFO L168 Benchmark]: RCFGBuilder took 281.68 ms. Allocated memory is still 205.5 MB. Free memory was 158.2 MB in the beginning and 175.3 MB in the end (delta: -17.1 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:22:25,355 INFO L168 Benchmark]: TraceAbstraction took 29379.07 ms. Allocated memory was 205.5 MB in the beginning and 284.2 MB in the end (delta: 78.6 MB). Free memory was 174.8 MB in the beginning and 227.4 MB in the end (delta: -52.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:22:25,355 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 205.5 MB. Free memory was 186.6 MB in the beginning and 186.5 MB in the end (delta: 101.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 182.75 ms. Allocated memory is still 205.5 MB. Free memory was 169.4 MB in the beginning and 159.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.22 ms. Allocated memory is still 205.5 MB. Free memory was 159.6 MB in the beginning and 158.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 281.68 ms. Allocated memory is still 205.5 MB. Free memory was 158.2 MB in the beginning and 175.3 MB in the end (delta: -17.1 MB). Peak memory consumption was 2.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 29379.07 ms. Allocated memory was 205.5 MB in the beginning and 284.2 MB in the end (delta: 78.6 MB). Free memory was 174.8 MB in the beginning and 227.4 MB in the end (delta: -52.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29152.4ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 8.4ms, AutomataDifference: 18603.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 162.6ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 45 SDslu, 333 SDs, 0 SdLazy, 185 SolverSat, 17 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 18258.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 8335.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=6, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.1ms AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 27 NumberOfFragments, 182 HoareAnnotationTreeSize, 19 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 40.3ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 184 FormulaSimplificationTreeSizeReductionInter, 113.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 52.4ms SsaConstructionTime, 134.7ms SatisfiabilityAnalysisTime, 8705.8ms InterpolantComputationTime, 131 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 449 SizeOfPredicates, 12 NumberOfNonLiveVariables, 780 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 25/43 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((!(\old(counter) <= 0) || ((x == z * z + z + 1 && 2 <= counter) && y == z * z)) || (((1 <= counter && counter <= 1) && x == z + 1) && z == y)) || !(0 <= \old(counter))) || (((y == 1 && counter <= 0) && 0 <= counter) && x == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...