/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/ps5-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:52:06,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:52:06,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:52:06,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:52:06,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:52:06,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:52:06,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:52:06,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:52:06,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:52:06,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:52:06,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:52:06,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:52:06,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:52:06,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:52:06,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:52:06,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:52:06,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:52:06,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:52:06,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:52:06,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:52:06,938 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 13:52:06,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:52:06,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:52:06,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:52:06,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:52:06,963 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:52:06,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:52:06,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:52:06,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:52:06,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:52:06,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:52:06,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:52:06,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:52:06,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:52:06,964 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:52:06,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:52:06,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:52:06,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:52:06,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:52:06,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:52:06,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:52:06,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:52:06,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:52:06,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:52:06,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:52:06,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:52:06,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:52:06,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:52:06,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:52:06,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:52:07,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:52:07,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:52:07,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:52:07,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:52:07,246 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:52:07,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps5-ll.c [2021-05-02 13:52:07,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf50f7e79/b6706445aaf245d8b0201bf2250cd434/FLAG7c3cf358e [2021-05-02 13:52:07,654 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:52:07,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps5-ll.c [2021-05-02 13:52:07,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf50f7e79/b6706445aaf245d8b0201bf2250cd434/FLAG7c3cf358e [2021-05-02 13:52:08,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf50f7e79/b6706445aaf245d8b0201bf2250cd434 [2021-05-02 13:52:08,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:52:08,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:52:08,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:52:08,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:52:08,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:52:08,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:52:08" (1/1) ... [2021-05-02 13:52:08,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18a99448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08, skipping insertion in model container [2021-05-02 13:52:08,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:52:08" (1/1) ... [2021-05-02 13:52:08,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:52:08,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:52:08,190 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/ps5-ll.c[458,471] [2021-05-02 13:52:08,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:52:08,204 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:52:08,228 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/ps5-ll.c[458,471] [2021-05-02 13:52:08,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:52:08,269 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:52:08,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08 WrapperNode [2021-05-02 13:52:08,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:52:08,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:52:08,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:52:08,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:52:08,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08" (1/1) ... [2021-05-02 13:52:08,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08" (1/1) ... [2021-05-02 13:52:08,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08" (1/1) ... [2021-05-02 13:52:08,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08" (1/1) ... [2021-05-02 13:52:08,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08" (1/1) ... [2021-05-02 13:52:08,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08" (1/1) ... [2021-05-02 13:52:08,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08" (1/1) ... [2021-05-02 13:52:08,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:52:08,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:52:08,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:52:08,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:52:08,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08" (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 13:52:08,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:52:08,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:52:08,435 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:52:08,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:52:08,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:52:08,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:52:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:52:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:52:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:52:08,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:52:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 13:52:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:52:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:52:08,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:52:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:52:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:52:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:52:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:52:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:52:08,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:52:08,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:52:08,659 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:52:08,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:52:08 BoogieIcfgContainer [2021-05-02 13:52:08,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:52:08,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:52:08,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:52:08,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:52:08,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:52:08" (1/3) ... [2021-05-02 13:52:08,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6533fe82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:52:08, skipping insertion in model container [2021-05-02 13:52:08,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:08" (2/3) ... [2021-05-02 13:52:08,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6533fe82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:52:08, skipping insertion in model container [2021-05-02 13:52:08,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:52:08" (3/3) ... [2021-05-02 13:52:08,679 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll.c [2021-05-02 13:52:08,683 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:52:08,685 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:52:08,712 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:52:08,733 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:52:08,737 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:52:08,737 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:52:08,737 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:52:08,737 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:52:08,737 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:52:08,737 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:52:08,738 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:52:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:52:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:52:08,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:08,752 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 13:52:08,752 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2021-05-02 13:52:08,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:08,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146243047] [2021-05-02 13:52:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:08,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:52:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:08,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:52:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:08,895 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 13:52:08,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:08,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146243047] [2021-05-02 13:52:08,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146243047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:52:08,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:52:08,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:52:08,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328192861] [2021-05-02 13:52:08,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:52:08,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:08,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:52:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:52:08,908 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 13:52:08,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:08,964 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2021-05-02 13:52:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:52:08,966 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 13:52:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:08,971 INFO L225 Difference]: With dead ends: 47 [2021-05-02 13:52:08,971 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 13:52:08,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:52:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 13:52:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 13:52:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:52:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-02 13:52:09,004 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-02 13:52:09,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:09,004 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-02 13:52:09,004 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 13:52:09,004 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-02 13:52:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:52:09,005 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:09,005 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 13:52:09,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:52:09,006 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2021-05-02 13:52:09,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:09,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519818213] [2021-05-02 13:52:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:09,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:09,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749174318] [2021-05-02 13:52:09,029 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 13:52:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:09,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:52:09,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:09,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:09,172 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 13:52:09,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:09,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519818213] [2021-05-02 13:52:09,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:09,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749174318] [2021-05-02 13:52:09,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749174318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:52:09,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:52:09,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 13:52:09,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909777481] [2021-05-02 13:52:09,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:52:09,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:52:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:52:09,175 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:52:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:09,231 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 13:52:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:52:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:52:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:09,232 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:52:09,232 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:52:09,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:52:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:52:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 13:52:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:52:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 13:52:09,240 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-02 13:52:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:09,240 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 13:52:09,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:52:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 13:52:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 13:52:09,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:09,241 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:09,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:52:09,453 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2021-05-02 13:52:09,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:09,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613259446] [2021-05-02 13:52:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:09,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:09,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897442847] [2021-05-02 13:52:09,478 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 13:52:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:09,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:52:09,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:09,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:52:09,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:09,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613259446] [2021-05-02 13:52:09,683 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:09,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897442847] [2021-05-02 13:52:09,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897442847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:09,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:09,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:52:09,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433437247] [2021-05-02 13:52:09,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:52:09,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:52:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:52:09,685 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:52:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:09,802 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-02 13:52:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:52:09,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 13:52:09,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:09,803 INFO L225 Difference]: With dead ends: 41 [2021-05-02 13:52:09,803 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 13:52:09,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:52:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 13:52:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 13:52:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:52:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 13:52:09,831 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2021-05-02 13:52:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:09,831 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 13:52:09,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:52:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 13:52:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 13:52:09,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:09,832 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:10,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:10,033 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash -965543213, now seen corresponding path program 2 times [2021-05-02 13:52:10,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:10,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656487266] [2021-05-02 13:52:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:10,043 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:10,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897962791] [2021-05-02 13:52:10,043 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 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 13:52:10,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:52:10,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:52:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:52:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:52:12,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:12,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656487266] [2021-05-02 13:52:12,384 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:12,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897962791] [2021-05-02 13:52:12,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897962791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:12,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:12,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:52:12,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465261953] [2021-05-02 13:52:12,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:52:12,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:52:12,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:52:12,386 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:52:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:12,501 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-05-02 13:52:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:52:12,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 13:52:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:12,505 INFO L225 Difference]: With dead ends: 50 [2021-05-02 13:52:12,505 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 13:52:12,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2098.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:52:12,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 13:52:12,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 13:52:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:52:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-05-02 13:52:12,512 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2021-05-02 13:52:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:12,513 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-05-02 13:52:12,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:52:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-05-02 13:52:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 13:52:12,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:12,513 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 13:52:12,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:12,720 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:12,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1106328449, now seen corresponding path program 1 times [2021-05-02 13:52:12,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:12,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012503139] [2021-05-02 13:52:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:12,730 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:12,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98524766] [2021-05-02 13:52:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:12,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:52:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:12,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:52:12,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:12,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012503139] [2021-05-02 13:52:12,948 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:12,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98524766] [2021-05-02 13:52:12,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98524766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:12,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:12,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:52:12,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638984140] [2021-05-02 13:52:12,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:52:12,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:12,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:52:12,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:52:12,949 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:52:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:13,061 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 13:52:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:52:13,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2021-05-02 13:52:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:13,063 INFO L225 Difference]: With dead ends: 53 [2021-05-02 13:52:13,063 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 13:52:13,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:52:13,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 13:52:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 13:52:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:52:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-02 13:52:13,069 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 35 [2021-05-02 13:52:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:13,069 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-02 13:52:13,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:52:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-02 13:52:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 13:52:13,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:13,070 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:13,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:13,289 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:13,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1045939826, now seen corresponding path program 3 times [2021-05-02 13:52:13,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:13,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506535936] [2021-05-02 13:52:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:13,300 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:13,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132259476] [2021-05-02 13:52:13,301 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 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