/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/hard2_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:40:51,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:40:51,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:40:51,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:40:51,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:40:51,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:40:51,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:40:51,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:40:51,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:40:51,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:40:51,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:40:51,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:40:51,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:40:51,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:40:51,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:40:51,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:40:51,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:40:51,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:40:51,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:40:51,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:40:51,861 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 15:40:51,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:40:51,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:40:51,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:40:51,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:40:51,889 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:40:51,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:40:51,890 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:40:51,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:40:51,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:40:51,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:40:51,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:40:51,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:40:51,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:40:51,890 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:40:51,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:40:51,891 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:40:51,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:40:51,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:40:51,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:40:51,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:40:51,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:40:51,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:40:51,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:40:51,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:40:51,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:40:51,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:40:51,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:40:51,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:40:51,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:40:52,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:40:52,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:40:52,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:40:52,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:40:52,139 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:40:52,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c [2021-05-02 15:40:52,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb909dea/086212ee77114e20b126cc7ff883e8f2/FLAGb2d1e60fa [2021-05-02 15:40:52,488 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:40:52,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c [2021-05-02 15:40:52,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb909dea/086212ee77114e20b126cc7ff883e8f2/FLAGb2d1e60fa [2021-05-02 15:40:52,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb909dea/086212ee77114e20b126cc7ff883e8f2 [2021-05-02 15:40:52,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:40:52,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:40:52,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:40:52,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:40:52,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:40:52,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:40:52" (1/1) ... [2021-05-02 15:40:52,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37a1c5b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:52, skipping insertion in model container [2021-05-02 15:40:52,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:40:52" (1/1) ... [2021-05-02 15:40:52,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:40:52,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:40:53,010 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/hard2_valuebound2.c[526,539] [2021-05-02 15:40:53,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:40:53,022 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:40:53,030 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/hard2_valuebound2.c[526,539] [2021-05-02 15:40:53,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:40:53,042 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:40:53,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:53 WrapperNode [2021-05-02 15:40:53,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:40:53,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:40:53,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:40:53,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:40:53,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:53" (1/1) ... [2021-05-02 15:40:53,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:53" (1/1) ... [2021-05-02 15:40:53,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:53" (1/1) ... [2021-05-02 15:40:53,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:53" (1/1) ... [2021-05-02 15:40:53,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:53" (1/1) ... [2021-05-02 15:40:53,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:53" (1/1) ... [2021-05-02 15:40:53,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:53" (1/1) ... [2021-05-02 15:40:53,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:40:53,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:40:53,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:40:53,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:40:53,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:53" (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 15:40:53,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:40:53,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:40:53,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:40:53,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:40:53,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:40:53,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:40:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:40:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:40:53,155 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:40:53,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:40:53,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:40:53,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:40:53,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:40:53,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:40:53,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:40:53,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:40:53,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:40:53,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:40:53,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:40:53,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:40:53,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:40:53,393 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:40:53,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:40:53 BoogieIcfgContainer [2021-05-02 15:40:53,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:40:53,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:40:53,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:40:53,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:40:53,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:40:52" (1/3) ... [2021-05-02 15:40:53,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51722a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:40:53, skipping insertion in model container [2021-05-02 15:40:53,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:40:53" (2/3) ... [2021-05-02 15:40:53,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51722a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:40:53, skipping insertion in model container [2021-05-02 15:40:53,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:40:53" (3/3) ... [2021-05-02 15:40:53,399 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2021-05-02 15:40:53,402 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:40:53,405 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:40:53,417 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:40:53,441 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:40:53,441 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:40:53,441 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:40:53,441 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:40:53,442 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:40:53,442 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:40:53,442 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:40:53,442 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:40:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:40:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 15:40:53,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:53,458 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:53,459 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2021-05-02 15:40:53,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:53,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989862599] [2021-05-02 15:40:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:53,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:40:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:53,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:40:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:40:53,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:53,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989862599] [2021-05-02 15:40:53,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989862599] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:40:53,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:40:53,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:40:53,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996104508] [2021-05-02 15:40:53,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:40:53,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:40:53,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:40:53,679 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:40:53,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:53,802 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2021-05-02 15:40:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:40:53,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 15:40:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:53,810 INFO L225 Difference]: With dead ends: 61 [2021-05-02 15:40:53,810 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 15:40:53,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:40:53,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 15:40:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 15:40:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:40:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-02 15:40:53,838 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-02 15:40:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:53,838 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-02 15:40:53,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:40:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-02 15:40:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 15:40:53,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:53,839 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:53,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:40:53,839 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2021-05-02 15:40:53,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:53,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617077981] [2021-05-02 15:40:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:53,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:40:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:53,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:40:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:53,936 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 15:40:53,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:53,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617077981] [2021-05-02 15:40:53,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617077981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:40:53,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:40:53,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:40:53,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630742514] [2021-05-02 15:40:53,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:40:53,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:53,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:40:53,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:40:53,938 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:40:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:54,165 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-05-02 15:40:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:40:54,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 15:40:54,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:54,166 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:40:54,167 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 15:40:54,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:54,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 15:40:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-02 15:40:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:40:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-02 15:40:54,175 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-02 15:40:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:54,175 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-02 15:40:54,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:40:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-02 15:40:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:40:54,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:54,176 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:54,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:40:54,176 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:54,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2021-05-02 15:40:54,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:54,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966192788] [2021-05-02 15:40:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:54,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:40:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:54,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:40:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:54,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 15:40:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:40:54,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:54,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966192788] [2021-05-02 15:40:54,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966192788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:40:54,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:40:54,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:40:54,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337311404] [2021-05-02 15:40:54,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:40:54,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:40:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:40:54,239 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:40:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:54,500 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-02 15:40:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:40:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 15:40:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:54,504 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:40:54,504 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:40:54,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:40:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-02 15:40:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:40:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-02 15:40:54,524 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-02 15:40:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:54,524 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-02 15:40:54,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:40:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-02 15:40:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 15:40:54,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:54,525 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:54,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:40:54,525 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2021-05-02 15:40:54,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:54,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384323056] [2021-05-02 15:40:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:54,540 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:54,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326264093] [2021-05-02 15:40:54,541 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 15:40:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:54,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:40:54,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:40:54,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:54,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384323056] [2021-05-02 15:40:54,799 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:54,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326264093] [2021-05-02 15:40:54,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326264093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:54,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:54,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:40:54,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645166851] [2021-05-02 15:40:54,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:40:54,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:54,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:40:54,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:40:54,801 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:40:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:54,899 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-05-02 15:40:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:40:54,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 15:40:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:54,900 INFO L225 Difference]: With dead ends: 70 [2021-05-02 15:40:54,900 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:40:54,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:40:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 15:40:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:40:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-05-02 15:40:54,908 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2021-05-02 15:40:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:54,908 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-05-02 15:40:54,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:40:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-05-02 15:40:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 15:40:54,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:54,909 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:55,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:55,124 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2021-05-02 15:40:55,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:55,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070141620] [2021-05-02 15:40:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:55,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:55,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775291539] [2021-05-02 15:40:55,132 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 15:40:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:55,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:40:55,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 15:40:55,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:55,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070141620] [2021-05-02 15:40:55,291 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:55,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775291539] [2021-05-02 15:40:55,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775291539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:55,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:55,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:40:55,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453571987] [2021-05-02 15:40:55,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:40:55,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:55,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:40:55,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:40:55,293 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:40:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:55,384 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2021-05-02 15:40:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:40:55,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 15:40:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:55,390 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:40:55,390 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 15:40:55,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:40:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 15:40:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 15:40:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 15:40:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-05-02 15:40:55,405 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 34 [2021-05-02 15:40:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:55,405 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-05-02 15:40:55,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:40:55,410 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-05-02 15:40:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 15:40:55,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:55,411 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:55,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:55,625 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:55,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2021-05-02 15:40:55,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:55,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877867486] [2021-05-02 15:40:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:55,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:55,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277813400] [2021-05-02 15:40:55,632 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 15:40:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 15:40:55,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:40:55,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:55,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877867486] [2021-05-02 15:40:55,813 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:55,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277813400] [2021-05-02 15:40:55,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277813400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:55,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:55,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:40:55,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887858645] [2021-05-02 15:40:55,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:40:55,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:40:55,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:40:55,815 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:40:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:55,981 INFO L93 Difference]: Finished difference Result 108 states and 138 transitions. [2021-05-02 15:40:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:40:55,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2021-05-02 15:40:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:55,985 INFO L225 Difference]: With dead ends: 108 [2021-05-02 15:40:55,985 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 15:40:55,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:40:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 15:40:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 15:40:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:40:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2021-05-02 15:40:55,993 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 44 [2021-05-02 15:40:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:55,994 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2021-05-02 15:40:55,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:40:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2021-05-02 15:40:55,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:40:55,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:55,995 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:56,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:56,213 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1230656439, now seen corresponding path program 2 times [2021-05-02 15:40:56,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:56,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061279929] [2021-05-02 15:40:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:56,221 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:56,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333792807] [2021-05-02 15:40:56,221 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 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 15:40:56,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:40:56,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:40:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 15:40:56,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 33 proven. 17 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 15:40:56,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:56,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061279929] [2021-05-02 15:40:56,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:56,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333792807] [2021-05-02 15:40:56,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333792807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:56,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:56,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:40:56,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992103640] [2021-05-02 15:40:56,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:40:56,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:56,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:40:56,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:56,428 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:40:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:56,640 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-02 15:40:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:40:56,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-02 15:40:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:56,641 INFO L225 Difference]: With dead ends: 131 [2021-05-02 15:40:56,641 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 15:40:56,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:40:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 15:40:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-05-02 15:40:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 59 states have (on average 1.152542372881356) internal successors, (68), 62 states have internal predecessors, (68), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 15:40:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2021-05-02 15:40:56,651 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 61 [2021-05-02 15:40:56,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:56,651 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2021-05-02 15:40:56,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:40:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2021-05-02 15:40:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:40:56,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:56,652 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:56,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:56,872 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:56,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2021-05-02 15:40:56,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:56,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430276473] [2021-05-02 15:40:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:56,878 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:56,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945600895] [2021-05-02 15:40:56,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:40:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:56,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 15:40:56,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 15:40:57,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:57,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430276473] [2021-05-02 15:40:57,074 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:57,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945600895] [2021-05-02 15:40:57,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945600895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:57,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:57,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:40:57,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627280619] [2021-05-02 15:40:57,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:40:57,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:57,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:40:57,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:40:57,076 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:40:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:57,219 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2021-05-02 15:40:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:40:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-02 15:40:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:57,221 INFO L225 Difference]: With dead ends: 123 [2021-05-02 15:40:57,221 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 15:40:57,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:40:57,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 15:40:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-02 15:40:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 75 states have internal predecessors, (84), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:40:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2021-05-02 15:40:57,230 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 64 [2021-05-02 15:40:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:57,231 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2021-05-02 15:40:57,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:40:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2021-05-02 15:40:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 15:40:57,232 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:57,232 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:57,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:57,445 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:57,445 INFO L82 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 2 times [2021-05-02 15:40:57,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:57,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954193998] [2021-05-02 15:40:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:57,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:57,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496626137] [2021-05-02 15:40:57,451 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 15:40:57,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:40:57,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:40:57,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 15:40:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 15:40:57,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:57,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954193998] [2021-05-02 15:40:57,650 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:57,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496626137] [2021-05-02 15:40:57,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496626137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:57,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:57,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:40:57,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180772782] [2021-05-02 15:40:57,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:40:57,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:57,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:40:57,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:57,652 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 15:40:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:57,795 INFO L93 Difference]: Finished difference Result 146 states and 176 transitions. [2021-05-02 15:40:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:40:57,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 69 [2021-05-02 15:40:57,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:57,797 INFO L225 Difference]: With dead ends: 146 [2021-05-02 15:40:57,797 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 15:40:57,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:40:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 15:40:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-02 15:40:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 75 states have (on average 1.12) internal successors, (84), 78 states have internal predecessors, (84), 31 states have call successors, (31), 17 states have call predecessors, (31), 16 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:40:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2021-05-02 15:40:57,805 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 69 [2021-05-02 15:40:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:57,805 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2021-05-02 15:40:57,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 15:40:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2021-05-02 15:40:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:40:57,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:57,807 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:58,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:58,021 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2021-05-02 15:40:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:58,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424692890] [2021-05-02 15:40:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:58,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:58,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145557434] [2021-05-02 15:40:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:40:58,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:40:58,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 15:40:58,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424692890] [2021-05-02 15:40:58,235 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:58,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145557434] [2021-05-02 15:40:58,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145557434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:58,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:58,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:40:58,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319409077] [2021-05-02 15:40:58,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:40:58,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:58,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:40:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:58,236 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:40:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:58,377 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2021-05-02 15:40:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:40:58,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-02 15:40:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:58,379 INFO L225 Difference]: With dead ends: 129 [2021-05-02 15:40:58,379 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 15:40:58,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:40:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 15:40:58,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 15:40:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 states have internal predecessors, (69), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 15:40:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2021-05-02 15:40:58,387 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 75 [2021-05-02 15:40:58,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:58,387 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2021-05-02 15:40:58,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:40:58,388 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2021-05-02 15:40:58,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 15:40:58,388 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:58,388 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:58,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 15:40:58,605 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1862740680, now seen corresponding path program 3 times [2021-05-02 15:40:58,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:58,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77950835] [2021-05-02 15:40:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:58,614 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:58,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238731427] [2021-05-02 15:40:58,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:58,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:40:58,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:40:58,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:40:58,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:58,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:40:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-05-02 15:40:58,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:58,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77950835] [2021-05-02 15:40:58,975 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:58,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238731427] [2021-05-02 15:40:58,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238731427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:58,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:58,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:40:58,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753623477] [2021-05-02 15:40:58,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:40:58,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:58,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:40:58,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:40:58,976 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:40:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:59,202 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2021-05-02 15:40:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:40:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 78 [2021-05-02 15:40:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:59,203 INFO L225 Difference]: With dead ends: 127 [2021-05-02 15:40:59,203 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 15:40:59,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:40:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 15:40:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-02 15:40:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 71 states have internal predecessors, (78), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:40:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2021-05-02 15:40:59,213 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 78 [2021-05-02 15:40:59,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:59,214 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2021-05-02 15:40:59,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:40:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2021-05-02 15:40:59,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 15:40:59,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:59,215 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:40:59,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:40:59,427 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:40:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:40:59,428 INFO L82 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 3 times [2021-05-02 15:40:59,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:40:59,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471624842] [2021-05-02 15:40:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:40:59,433 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:40:59,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189426335] [2021-05-02 15:40:59,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:40:59,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:40:59,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:40:59,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 15:40:59,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:40:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 15:40:59,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:40:59,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471624842] [2021-05-02 15:40:59,647 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:40:59,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189426335] [2021-05-02 15:40:59,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189426335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:40:59,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:40:59,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:40:59,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873955953] [2021-05-02 15:40:59,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:40:59,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:40:59,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:40:59,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:40:59,649 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 15:40:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:40:59,834 INFO L93 Difference]: Finished difference Result 135 states and 159 transitions. [2021-05-02 15:40:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:40:59,834 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-05-02 15:40:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:40:59,835 INFO L225 Difference]: With dead ends: 135 [2021-05-02 15:40:59,835 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 15:40:59,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:40:59,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 15:40:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2021-05-02 15:40:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 83 states have internal predecessors, (92), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 15:40:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2021-05-02 15:40:59,844 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 81 [2021-05-02 15:40:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:40:59,844 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2021-05-02 15:40:59,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 15:40:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2021-05-02 15:40:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 15:40:59,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:40:59,845 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:41:00,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:41:00,060 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:41:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:41:00,061 INFO L82 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 4 times [2021-05-02 15:41:00,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:41:00,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114595355] [2021-05-02 15:41:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:41:00,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:41:00,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637742552] [2021-05-02 15:41:00,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:41:00,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:41:00,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:41:00,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 15:41:00,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:41:00,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 15:41:00,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:41:00,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114595355] [2021-05-02 15:41:00,327 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:41:00,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637742552] [2021-05-02 15:41:00,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637742552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:41:00,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:41:00,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:41:00,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684429400] [2021-05-02 15:41:00,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:41:00,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:41:00,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:41:00,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:41:00,328 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 15:41:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:41:00,618 INFO L93 Difference]: Finished difference Result 147 states and 173 transitions. [2021-05-02 15:41:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:41:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2021-05-02 15:41:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:41:00,619 INFO L225 Difference]: With dead ends: 147 [2021-05-02 15:41:00,619 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 15:41:00,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-02 15:41:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 15:41:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-05-02 15:41:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.127906976744186) internal successors, (97), 88 states have internal predecessors, (97), 34 states have call successors, (34), 19 states have call predecessors, (34), 18 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:41:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2021-05-02 15:41:00,629 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 86 [2021-05-02 15:41:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:41:00,629 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2021-05-02 15:41:00,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 15:41:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2021-05-02 15:41:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 15:41:00,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:41:00,630 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:41:00,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:41:00,848 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:41:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:41:00,848 INFO L82 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 5 times [2021-05-02 15:41:00,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:41:00,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526170913] [2021-05-02 15:41:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:41:00,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:41:00,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598938913] [2021-05-02 15:41:00,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:41:00,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 15:41:00,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:41:00,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 15:41:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:41:00,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:00,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 54 proven. 32 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-02 15:41:01,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:41:01,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526170913] [2021-05-02 15:41:01,151 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:41:01,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598938913] [2021-05-02 15:41:01,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598938913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:41:01,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:41:01,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:41:01,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182166377] [2021-05-02 15:41:01,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:41:01,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:41:01,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:41:01,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:41:01,152 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 15:41:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:41:01,453 INFO L93 Difference]: Finished difference Result 167 states and 205 transitions. [2021-05-02 15:41:01,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:41:01,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 94 [2021-05-02 15:41:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:41:01,455 INFO L225 Difference]: With dead ends: 167 [2021-05-02 15:41:01,455 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 15:41:01,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-02 15:41:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 15:41:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 15:41:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 71 states have internal predecessors, (77), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 15:41:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2021-05-02 15:41:01,462 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 94 [2021-05-02 15:41:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:41:01,462 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2021-05-02 15:41:01,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 15:41:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2021-05-02 15:41:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 15:41:01,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:41:01,463 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:41:01,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:41:01,677 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:41:01,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:41:01,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1821891511, now seen corresponding path program 1 times [2021-05-02 15:41:01,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:41:01,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709398481] [2021-05-02 15:41:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:41:01,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:41:01,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867503466] [2021-05-02 15:41:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:41:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:41:01,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 15:41:01,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:41:01,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-05-02 15:41:01,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:41:01,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709398481] [2021-05-02 15:41:01,953 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:41:01,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867503466] [2021-05-02 15:41:01,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867503466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:41:01,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:41:01,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:41:01,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307828414] [2021-05-02 15:41:01,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:41:01,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:41:01,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:41:01,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:41:01,954 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 15:41:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:41:02,015 INFO L93 Difference]: Finished difference Result 135 states and 156 transitions. [2021-05-02 15:41:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:41:02,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-02 15:41:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:41:02,016 INFO L225 Difference]: With dead ends: 135 [2021-05-02 15:41:02,016 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 15:41:02,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:41:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 15:41:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-05-02 15:41:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 64 states have (on average 1.09375) internal successors, (70), 66 states have internal predecessors, (70), 25 states have call successors, (25), 15 states have call predecessors, (25), 14 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 15:41:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-05-02 15:41:02,023 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 94 [2021-05-02 15:41:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:41:02,023 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-05-02 15:41:02,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 15:41:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-05-02 15:41:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 15:41:02,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:41:02,024 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:41:02,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 15:41:02,239 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:41:02,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:41:02,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2142093698, now seen corresponding path program 2 times [2021-05-02 15:41:02,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:41:02,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292333613] [2021-05-02 15:41:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:41:02,245 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:41:02,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102460319] [2021-05-02 15:41:02,245 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:41:02,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:41:02,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:41:02,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 15:41:02,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:41:02,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:41:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 109 proven. 44 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-05-02 15:41:02,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:41:02,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292333613] [2021-05-02 15:41:02,615 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:41:02,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102460319] [2021-05-02 15:41:02,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102460319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:41:02,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:41:02,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:41:02,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249130755] [2021-05-02 15:41:02,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:41:02,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:41:02,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:41:02,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:41:02,616 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 15:41:02,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:41:02,785 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2021-05-02 15:41:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:41:02,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 99 [2021-05-02 15:41:02,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:41:02,786 INFO L225 Difference]: With dead ends: 112 [2021-05-02 15:41:02,786 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:41:02,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:41:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:41:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:41:02,787 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 15:41:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:41:02,787 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2021-05-02 15:41:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:41:02,787 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:41:02,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 15:41:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:41:02,787 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:41:03,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:41:03,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:41:03,527 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 43 [2021-05-02 15:41:03,702 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2021-05-02 15:41:03,940 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 43 [2021-05-02 15:41:04,102 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2021-05-02 15:41:04,247 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2021-05-02 15:41:04,483 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 34 [2021-05-02 15:41:04,487 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:41:04,491 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:41:04,491 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:41:04,491 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:41:04,491 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)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:41:04,491 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:41:04,491 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:41:04,491 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:41:04,491 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:41:04,492 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:41:04,492 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 15:41:04,492 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:41:04,492 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:41:04,492 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:41:04,492 INFO L194 CegarLoopUtils]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= main_~B~0 main_~d~0)) (.cse1 (= main_~B~0 1))) (or (and .cse0 (= main_~p~0 1) .cse1) (and .cse0 (<= 0 main_~A~0) (<= main_~A~0 2) (<= main_~r~0 2) .cse1))) [2021-05-02 15:41:04,492 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 61) no Hoare annotation was computed. [2021-05-02 15:41:04,492 INFO L198 CegarLoopUtils]: For program point L52(lines 52 55) no Hoare annotation was computed. [2021-05-02 15:41:04,492 INFO L198 CegarLoopUtils]: For program point L52-2(lines 22 61) no Hoare annotation was computed. [2021-05-02 15:41:04,492 INFO L198 CegarLoopUtils]: For program point L46(lines 44 56) no Hoare annotation was computed. [2021-05-02 15:41:04,492 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 61) no Hoare annotation was computed. [2021-05-02 15:41:04,492 INFO L194 CegarLoopUtils]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (= main_~B~0 main_~d~0)) (.cse1 (= main_~p~0 1)) (.cse2 (= main_~B~0 1))) (or (and (= main_~A~0 (+ main_~r~0 (* main_~B~0 2))) (<= (* 2 main_~B~0) main_~A~0) .cse0 .cse1 (< main_~r~0 main_~d~0) .cse2 (= main_~q~0 2)) (and (= main_~A~0 (+ main_~r~0 main_~d~0)) (= main_~d~0 1) (= main_~q~0 main_~p~0) .cse1 .cse2) (and .cse0 (= main_~q~0 0) (= main_~A~0 main_~r~0) .cse1 .cse2))) [2021-05-02 15:41:04,493 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (<= 0 main_~A~0)) (.cse2 (= main_~A~0 main_~r~0)) (.cse3 (<= main_~r~0 2)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 (= main_~d~0 2) (= main_~p~0 2) .cse2 .cse3 .cse4) (and .cse0 (= main_~d~0 (* main_~B~0 4)) (= (mod main_~p~0 2) 0) .cse2 (<= main_~A~0 2) (<= (* 2 main_~B~0) main_~r~0) .cse4 (= main_~d~0 (* (* (div main_~p~0 2) main_~B~0) 2))) (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4))) [2021-05-02 15:41:04,493 INFO L194 CegarLoopUtils]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (<= 0 main_~A~0)) (.cse2 (= main_~A~0 main_~r~0)) (.cse3 (<= main_~r~0 2)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 (= main_~d~0 2) (= main_~p~0 2) .cse2 .cse3 .cse4) (and .cse0 (= main_~d~0 (* main_~B~0 4)) (= (mod main_~p~0 2) 0) .cse2 (<= main_~A~0 2) (<= (* 2 main_~B~0) main_~r~0) .cse4 (= main_~d~0 (* (* (div main_~p~0 2) main_~B~0) 2))) (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4))) [2021-05-02 15:41:04,493 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 61) the Hoare annotation is: true [2021-05-02 15:41:04,493 INFO L198 CegarLoopUtils]: For program point L59(line 59) no Hoare annotation was computed. [2021-05-02 15:41:04,493 INFO L201 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-05-02 15:41:04,493 INFO L198 CegarLoopUtils]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-05-02 15:41:04,493 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (* main_~B~0 2)) (.cse8 (* 2 main_~B~0))) (let ((.cse1 (<= .cse8 main_~A~0)) (.cse5 (= main_~q~0 2)) (.cse2 (= main_~B~0 main_~d~0)) (.cse11 (= main_~q~0 main_~p~0)) (.cse3 (= main_~p~0 1)) (.cse9 (= main_~d~0 .cse0)) (.cse6 (= main_~q~0 0)) (.cse7 (= main_~A~0 main_~r~0)) (.cse4 (= main_~B~0 1))) (or (and (= main_~A~0 (+ main_~r~0 .cse0)) .cse1 .cse2 .cse3 (< main_~r~0 main_~d~0) .cse4 .cse5) (and .cse6 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) .cse7 (<= main_~A~0 2) (<= .cse8 main_~r~0) .cse4) (let ((.cse10 (+ main_~r~0 main_~d~0))) (and .cse1 .cse9 (= main_~A~0 .cse10) .cse11 (<= .cse10 2) .cse4 .cse5)) (and .cse2 .cse6 .cse7 .cse3 .cse4) (and (= main_~A~0 (+ main_~r~0 main_~B~0)) (= main_~d~0 1) .cse11 .cse3 .cse4) (and .cse9 .cse6 (= main_~p~0 2) .cse7 .cse4)))) [2021-05-02 15:41:04,493 INFO L194 CegarLoopUtils]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse0 (* main_~B~0 2)) (.cse8 (* 2 main_~B~0))) (let ((.cse1 (<= .cse8 main_~A~0)) (.cse5 (= main_~q~0 2)) (.cse2 (= main_~B~0 main_~d~0)) (.cse11 (= main_~q~0 main_~p~0)) (.cse3 (= main_~p~0 1)) (.cse9 (= main_~d~0 .cse0)) (.cse6 (= main_~q~0 0)) (.cse7 (= main_~A~0 main_~r~0)) (.cse4 (= main_~B~0 1))) (or (and (= main_~A~0 (+ main_~r~0 .cse0)) .cse1 .cse2 .cse3 (< main_~r~0 main_~d~0) .cse4 .cse5) (and .cse6 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) .cse7 (<= main_~A~0 2) (<= .cse8 main_~r~0) .cse4) (let ((.cse10 (+ main_~r~0 main_~d~0))) (and .cse1 .cse9 (= main_~A~0 .cse10) .cse11 (<= .cse10 2) .cse4 .cse5)) (and .cse2 .cse6 .cse7 .cse3 .cse4) (and (= main_~A~0 (+ main_~r~0 main_~B~0)) (= main_~d~0 1) .cse11 .cse3 .cse4) (and .cse9 .cse6 (= main_~p~0 2) .cse7 .cse4)))) [2021-05-02 15:41:04,493 INFO L198 CegarLoopUtils]: For program point L37(lines 34 42) no Hoare annotation was computed. [2021-05-02 15:41:04,493 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (<= 0 main_~A~0)) (.cse2 (= main_~A~0 main_~r~0)) (.cse3 (<= main_~r~0 2)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 (= main_~d~0 2) (= main_~p~0 2) .cse2 .cse3 .cse4) (and .cse0 (= main_~d~0 (* main_~B~0 4)) (= (mod main_~p~0 2) 0) .cse2 (<= main_~A~0 2) (<= (* 2 main_~B~0) main_~r~0) .cse4 (= main_~d~0 (* (* (div main_~p~0 2) main_~B~0) 2))) (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4))) [2021-05-02 15:41:04,493 INFO L194 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (<= 0 main_~A~0)) (.cse2 (= main_~A~0 main_~r~0)) (.cse3 (<= main_~r~0 2)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 (= main_~d~0 2) (= main_~p~0 2) .cse2 .cse3 .cse4) (and .cse0 (= main_~d~0 (* main_~B~0 4)) (= (mod main_~p~0 2) 0) .cse2 (<= main_~A~0 2) (<= (* 2 main_~B~0) main_~r~0) .cse4 (= main_~d~0 (* (* (div main_~p~0 2) main_~B~0) 2))) (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4))) [2021-05-02 15:41:04,493 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:41:04,493 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:41:04,493 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:41:04,493 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:41:04,493 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:41:04,494 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:41:04,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:41:04 BoogieIcfgContainer [2021-05-02 15:41:04,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:41:04,507 INFO L168 Benchmark]: Toolchain (without parser) took 11593.15 ms. Allocated memory was 198.2 MB in the beginning and 354.4 MB in the end (delta: 156.2 MB). Free memory was 164.5 MB in the beginning and 298.8 MB in the end (delta: -134.3 MB). Peak memory consumption was 193.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:41:04,507 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 198.2 MB. Free memory is still 180.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:41:04,507 INFO L168 Benchmark]: CACSL2BoogieTranslator took 126.44 ms. Allocated memory is still 198.2 MB. Free memory was 164.2 MB in the beginning and 154.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:41:04,507 INFO L168 Benchmark]: Boogie Preprocessor took 18.11 ms. Allocated memory is still 198.2 MB. Free memory was 154.4 MB in the beginning and 153.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:41:04,507 INFO L168 Benchmark]: RCFGBuilder took 332.52 ms. Allocated memory is still 198.2 MB. Free memory was 152.9 MB in the beginning and 167.3 MB in the end (delta: -14.4 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:41:04,507 INFO L168 Benchmark]: TraceAbstraction took 11111.17 ms. Allocated memory was 198.2 MB in the beginning and 354.4 MB in the end (delta: 156.2 MB). Free memory was 166.7 MB in the beginning and 298.8 MB in the end (delta: -132.1 MB). Peak memory consumption was 195.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:41:04,507 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 198.2 MB. Free memory is still 180.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 126.44 ms. Allocated memory is still 198.2 MB. Free memory was 164.2 MB in the beginning and 154.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.11 ms. Allocated memory is still 198.2 MB. Free memory was 154.4 MB in the beginning and 153.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 332.52 ms. Allocated memory is still 198.2 MB. Free memory was 152.9 MB in the beginning and 167.3 MB in the end (delta: -14.4 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11111.17 ms. Allocated memory was 198.2 MB in the beginning and 354.4 MB in the end (delta: 156.2 MB). Free memory was 166.7 MB in the beginning and 298.8 MB in the end (delta: -132.1 MB). Peak memory consumption was 195.1 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9561.6ms, OverallIterations: 16, TraceHistogramMax: 15, EmptinessCheckTime: 16.1ms, AutomataDifference: 2902.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1485.1ms, InitialAbstractionConstructionTime: 10.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 539 SDtfs, 355 SDslu, 2534 SDs, 0 SdLazy, 3328 SolverSat, 374 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1636.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 964 GetRequests, 801 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1356.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=13, InterpolantAutomatonStates: 142, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 144.0ms AutomataMinimizationTime, 16 MinimizatonAttempts, 23 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 15 LocationsWithAnnotation, 114 PreInvPairs, 146 NumberOfFragments, 729 HoareAnnotationTreeSize, 114 FomulaSimplifications, 10470 FormulaSimplificationTreeSizeReduction, 147.4ms HoareSimplificationTime, 15 FomulaSimplificationsInter, 3517 FormulaSimplificationTreeSizeReductionInter, 1323.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 117.0ms SsaConstructionTime, 344.5ms SatisfiabilityAnalysisTime, 2780.7ms InterpolantComputationTime, 962 NumberOfCodeBlocks, 896 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 946 ConstructedInterpolants, 0 QuantifiedInterpolants, 4417 SizeOfPredicates, 52 NumberOfNonLiveVariables, 2547 ConjunctsInSsa, 393 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 2448/2713 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: (((((((q == 0 && 0 <= A) && d == 2) && p == 2) && A == r) && r <= 2) && B == 1) || (((((((q == 0 && d == B * 4) && p % 2 == 0) && A == r) && A <= 2) && 2 * B <= r) && B == 1) && d == p / 2 * B * 2)) || ((((((q == 0 && 0 <= A) && A == r) && r <= 2) && d == 1) && p == 1) && B == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...