/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:34:33,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:34:33,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:34:33,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:34:33,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:34:33,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:34:33,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:34:33,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:34:33,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:34:33,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:34:33,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:34:33,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:34:33,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:34:33,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:34:33,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:34:33,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:34:33,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:34:33,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:34:33,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:34:33,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:34:33,891 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:34:33,923 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:34:33,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:34:33,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:34:33,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:34:33,926 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:34:33,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:34:33,926 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:34:33,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:34:33,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:34:33,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:34:33,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:34:33,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:34:33,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:34:33,928 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:34:33,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:34:33,928 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:34:33,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:34:33,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:34:33,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:34:33,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:34:33,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:34:33,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:34:33,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:34:33,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:34:33,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:34:33,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:34:33,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:34:33,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:34:33,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:34:34,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:34:34,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:34:34,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:34:34,236 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:34:34,236 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:34:34,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound10.c [2021-05-06 03:34:34,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/452a80f44/4fb025e1f82f480ebe220b6697088d32/FLAGab82ffd3f [2021-05-06 03:34:34,673 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:34:34,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound10.c [2021-05-06 03:34:34,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/452a80f44/4fb025e1f82f480ebe220b6697088d32/FLAGab82ffd3f [2021-05-06 03:34:34,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/452a80f44/4fb025e1f82f480ebe220b6697088d32 [2021-05-06 03:34:34,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:34:34,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:34:34,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:34:34,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:34:34,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:34:34,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:34:34" (1/1) ... [2021-05-06 03:34:34,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a96ad8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34, skipping insertion in model container [2021-05-06 03:34:34,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:34:34" (1/1) ... [2021-05-06 03:34:34,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:34:34,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:34:34,839 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_valuebound10.c[526,539] [2021-05-06 03:34:34,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:34:34,863 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:34:34,880 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_valuebound10.c[526,539] [2021-05-06 03:34:34,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:34:34,920 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:34:34,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34 WrapperNode [2021-05-06 03:34:34,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:34:34,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:34:34,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:34:34,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:34:34,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34" (1/1) ... [2021-05-06 03:34:34,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34" (1/1) ... [2021-05-06 03:34:34,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34" (1/1) ... [2021-05-06 03:34:34,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34" (1/1) ... [2021-05-06 03:34:34,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34" (1/1) ... [2021-05-06 03:34:34,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34" (1/1) ... [2021-05-06 03:34:34,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34" (1/1) ... [2021-05-06 03:34:34,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:34:34,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:34:34,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:34:34,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:34:34,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:34:35,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:34:35,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:34:35,017 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:34:35,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:34:35,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:34:35,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:34:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:34:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:34:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:34:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:34:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 03:34:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:34:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:34:35,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:34:35,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:34:35,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:34:35,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:34:35,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:34:35,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:34:35,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:34:35,263 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:34:35,263 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:34:35,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:34:35 BoogieIcfgContainer [2021-05-06 03:34:35,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:34:35,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:34:35,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:34:35,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:34:35,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:34:34" (1/3) ... [2021-05-06 03:34:35,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39287261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:34:35, skipping insertion in model container [2021-05-06 03:34:35,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:34:34" (2/3) ... [2021-05-06 03:34:35,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39287261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:34:35, skipping insertion in model container [2021-05-06 03:34:35,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:34:35" (3/3) ... [2021-05-06 03:34:35,269 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound10.c [2021-05-06 03:34:35,289 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:34:35,292 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:34:35,304 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:34:35,326 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:34:35,326 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:34:35,326 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:34:35,326 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:34:35,326 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:34:35,326 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:34:35,326 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:34:35,326 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:34:35,342 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) [2021-05-06 03:34:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 03:34:35,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:35,347 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:34:35,347 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:35,355 INFO L82 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2021-05-06 03:34:35,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:35,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709264073] [2021-05-06 03:34:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:35,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:34:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:35,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:34:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:34:35,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:35,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709264073] [2021-05-06 03:34:35,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709264073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:34:35,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:34:35,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:34:35,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663264991] [2021-05-06 03:34:35,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:34:35,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:35,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:34:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:34:35,586 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) [2021-05-06 03:34:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:35,704 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2021-05-06 03:34:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:34:35,705 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 [2021-05-06 03:34:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:35,710 INFO L225 Difference]: With dead ends: 61 [2021-05-06 03:34:35,710 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 03:34:35,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:34:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 03:34:35,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 03:34:35,739 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) [2021-05-06 03:34:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 03:34:35,741 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 03:34:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:35,741 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 03:34:35,741 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) [2021-05-06 03:34:35,741 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 03:34:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 03:34:35,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:35,742 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:34:35,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:34:35,742 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:35,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:35,743 INFO L82 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2021-05-06 03:34:35,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:35,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049196492] [2021-05-06 03:34:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:35,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:34:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:35,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:34:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:34:35,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:35,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049196492] [2021-05-06 03:34:35,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049196492] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:34:35,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:34:35,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:34:35,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507820163] [2021-05-06 03:34:35,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:34:35,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:34:35,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:34:35,870 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) [2021-05-06 03:34:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:36,215 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-05-06 03:34:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:34:36,216 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 [2021-05-06 03:34:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:36,217 INFO L225 Difference]: With dead ends: 43 [2021-05-06 03:34:36,217 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 03:34:36,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:34:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 03:34:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 03:34:36,225 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) [2021-05-06 03:34:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 03:34:36,226 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 03:34:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:36,226 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 03:34:36,226 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) [2021-05-06 03:34:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 03:34:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 03:34:36,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:36,227 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] [2021-05-06 03:34:36,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:34:36,227 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:36,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2021-05-06 03:34:36,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:36,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631911886] [2021-05-06 03:34:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:36,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:34:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:36,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:34:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:36,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 03:34:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:34:36,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:36,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631911886] [2021-05-06 03:34:36,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631911886] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:34:36,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:34:36,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:34:36,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563867467] [2021-05-06 03:34:36,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:34:36,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:36,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:34:36,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:34:36,339 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) [2021-05-06 03:34:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:36,594 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-06 03:34:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:34:36,595 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 [2021-05-06 03:34:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:36,598 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:34:36,598 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 03:34:36,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:34:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 03:34:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 03:34:36,616 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) [2021-05-06 03:34:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 03:34:36,618 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 03:34:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:36,618 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 03:34:36,618 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) [2021-05-06 03:34:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 03:34:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 03:34:36,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:36,619 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] [2021-05-06 03:34:36,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:34:36,619 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2021-05-06 03:34:36,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:36,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081668813] [2021-05-06 03:34:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:36,643 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:36,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232570646] [2021-05-06 03:34:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:36,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:34:36,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:36,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:34:36,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:36,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081668813] [2021-05-06 03:34:36,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:36,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232570646] [2021-05-06 03:34:36,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232570646] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:34:36,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:34:36,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:34:36,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548611186] [2021-05-06 03:34:36,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:34:36,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:36,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:34:36,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:34:36,813 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:34:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:36,861 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2021-05-06 03:34:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:34:36,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 03:34:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:36,862 INFO L225 Difference]: With dead ends: 66 [2021-05-06 03:34:36,862 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 03:34:36,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:34:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 03:34:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 03:34:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:34:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-06 03:34:36,871 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-06 03:34:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:36,871 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-06 03:34:36,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:34:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-06 03:34:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 03:34:36,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:36,872 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] [2021-05-06 03:34:37,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:37,090 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:37,091 INFO L82 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2021-05-06 03:34:37,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:37,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789823346] [2021-05-06 03:34:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:37,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:37,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371782897] [2021-05-06 03:34:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:37,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:34:37,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:37,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:34:37,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:37,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789823346] [2021-05-06 03:34:37,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:37,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371782897] [2021-05-06 03:34:37,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371782897] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:34:37,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:34:37,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:34:37,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520442730] [2021-05-06 03:34:37,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:34:37,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:37,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:34:37,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:34:37,289 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:34:37,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:37,338 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-05-06 03:34:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:34:37,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 03:34:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:37,339 INFO L225 Difference]: With dead ends: 65 [2021-05-06 03:34:37,339 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:34:37,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:34:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:34:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 03:34:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 03:34:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-05-06 03:34:37,348 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2021-05-06 03:34:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:37,348 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-05-06 03:34:37,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:34:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-05-06 03:34:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 03:34:37,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:37,349 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] [2021-05-06 03:34:37,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:37,550 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:37,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:37,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2021-05-06 03:34:37,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:37,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908675915] [2021-05-06 03:34:37,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:37,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:37,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762232559] [2021-05-06 03:34:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:37,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:34:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:37,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:34:37,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:37,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908675915] [2021-05-06 03:34:37,704 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:37,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762232559] [2021-05-06 03:34:37,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762232559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:37,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:37,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:34:37,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907857639] [2021-05-06 03:34:37,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:34:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:37,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:34:37,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:34:37,706 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:34:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:37,789 INFO L93 Difference]: Finished difference Result 105 states and 141 transitions. [2021-05-06 03:34:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:34:37,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 03:34:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:37,792 INFO L225 Difference]: With dead ends: 105 [2021-05-06 03:34:37,792 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 03:34:37,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:34:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 03:34:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 03:34:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:34:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-05-06 03:34:37,802 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 44 [2021-05-06 03:34:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:37,802 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-05-06 03:34:37,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:34:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-05-06 03:34:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 03:34:37,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:37,803 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] [2021-05-06 03:34:38,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:38,021 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:38,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1230656439, now seen corresponding path program 2 times [2021-05-06 03:34:38,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:38,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736772524] [2021-05-06 03:34:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:38,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:38,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439408881] [2021-05-06 03:34:38,029 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 [2021-05-06 03:34:38,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:34:38,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:34:38,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:34:38,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:38,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 03:34:38,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:38,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736772524] [2021-05-06 03:34:38,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:38,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439408881] [2021-05-06 03:34:38,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439408881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:38,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:38,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:34:38,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732272515] [2021-05-06 03:34:38,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:34:38,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:38,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:34:38,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:34:38,217 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:34:38,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:38,338 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2021-05-06 03:34:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:34:38,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 03:34:38,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:38,340 INFO L225 Difference]: With dead ends: 134 [2021-05-06 03:34:38,340 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 03:34:38,341 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:34:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 03:34:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 03:34:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 62 states have internal predecessors, (68), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:34:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2021-05-06 03:34:38,353 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 61 [2021-05-06 03:34:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:38,353 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2021-05-06 03:34:38,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:34:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2021-05-06 03:34:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 03:34:38,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:38,354 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] [2021-05-06 03:34:38,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:38,569 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2021-05-06 03:34:38,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:38,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311043228] [2021-05-06 03:34:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:38,576 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:38,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967689429] [2021-05-06 03:34:38,576 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 [2021-05-06 03:34:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:38,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 03:34:38,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:38,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 03:34:38,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:38,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311043228] [2021-05-06 03:34:38,789 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:38,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967689429] [2021-05-06 03:34:38,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967689429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:38,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:38,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:34:38,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602573683] [2021-05-06 03:34:38,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:34:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:38,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:34:38,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:34:38,796 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 03:34:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:38,891 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2021-05-06 03:34:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:34:38,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-06 03:34:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:38,897 INFO L225 Difference]: With dead ends: 127 [2021-05-06 03:34:38,897 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 03:34:38,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:34:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 03:34:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-06 03:34:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:34:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-05-06 03:34:38,917 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 64 [2021-05-06 03:34:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:38,918 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-05-06 03:34:38,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 03:34:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-05-06 03:34:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 03:34:38,922 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:38,923 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] [2021-05-06 03:34:39,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:39,137 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2021-05-06 03:34:39,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:39,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101317915] [2021-05-06 03:34:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:39,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:39,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801585514] [2021-05-06 03:34:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 03:34:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:39,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 03:34:39,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:39,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 03:34:39,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:39,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101317915] [2021-05-06 03:34:39,402 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:39,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801585514] [2021-05-06 03:34:39,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801585514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:39,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:39,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:34:39,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014514521] [2021-05-06 03:34:39,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:34:39,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:34:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:34:39,403 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:34:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:39,497 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2021-05-06 03:34:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:34:39,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 03:34:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:39,498 INFO L225 Difference]: With dead ends: 131 [2021-05-06 03:34:39,498 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 03:34:39,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:34:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 03:34:39,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 03:34:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 03:34:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 03:34:39,507 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 75 [2021-05-06 03:34:39,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:39,507 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 03:34:39,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:34:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 03:34:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 03:34:39,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:39,508 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] [2021-05-06 03:34:39,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:39,721 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1862740680, now seen corresponding path program 3 times [2021-05-06 03:34:39,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:39,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12717784] [2021-05-06 03:34:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:39,728 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:39,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291464998] [2021-05-06 03:34:39,729 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 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 [2021-05-06 03:34:39,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:34:39,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:34:39,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 03:34:39,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:39,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:39,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:39,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-05-06 03:34:39,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:39,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12717784] [2021-05-06 03:34:39,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:39,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291464998] [2021-05-06 03:34:39,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291464998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:39,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:39,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:34:39,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688842526] [2021-05-06 03:34:39,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:34:39,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:39,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:34:39,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:34:39,958 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:34:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:40,083 INFO L93 Difference]: Finished difference Result 123 states and 150 transitions. [2021-05-06 03:34:40,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:34:40,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-06 03:34:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:40,087 INFO L225 Difference]: With dead ends: 123 [2021-05-06 03:34:40,087 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 03:34:40,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:34:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 03:34:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 03:34:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 68 states have internal predecessors, (74), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 03:34:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-05-06 03:34:40,099 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 78 [2021-05-06 03:34:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:40,099 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-05-06 03:34:40,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:34:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-05-06 03:34:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 03:34:40,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:40,100 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] [2021-05-06 03:34:40,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:34:40,317 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:40,318 INFO L82 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 2 times [2021-05-06 03:34:40,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:40,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998523214] [2021-05-06 03:34:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:40,324 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:40,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191458861] [2021-05-06 03:34:40,324 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 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 [2021-05-06 03:34:40,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:34:40,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:34:40,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 03:34:40,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:40,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 03:34:40,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:40,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998523214] [2021-05-06 03:34:40,571 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:40,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191458861] [2021-05-06 03:34:40,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191458861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:40,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:40,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:34:40,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572406707] [2021-05-06 03:34:40,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:34:40,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:34:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:34:40,574 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 03:34:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:40,714 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-05-06 03:34:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:34:40,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-05-06 03:34:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:40,715 INFO L225 Difference]: With dead ends: 138 [2021-05-06 03:34:40,715 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 03:34:40,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:34:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 03:34:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 03:34:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:34:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2021-05-06 03:34:40,731 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 81 [2021-05-06 03:34:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:40,731 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2021-05-06 03:34:40,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 03:34:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2021-05-06 03:34:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 03:34:40,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:40,735 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] [2021-05-06 03:34:40,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:34:40,949 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:40,949 INFO L82 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 3 times [2021-05-06 03:34:40,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:40,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005112753] [2021-05-06 03:34:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:40,955 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:40,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024395142] [2021-05-06 03:34:40,955 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 [2021-05-06 03:34:41,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:34:41,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:34:41,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 03:34:41,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:41,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 03:34:41,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:41,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005112753] [2021-05-06 03:34:41,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:41,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024395142] [2021-05-06 03:34:41,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024395142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:41,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:41,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:34:41,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166248827] [2021-05-06 03:34:41,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:34:41,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:41,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:34:41,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:34:41,296 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:34:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:41,486 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2021-05-06 03:34:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:34:41,487 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), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 03:34:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:41,488 INFO L225 Difference]: With dead ends: 151 [2021-05-06 03:34:41,488 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 03:34:41,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:34:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 03:34:41,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-05-06 03:34:41,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 91 states have internal predecessors, (95), 34 states have call successors, (34), 20 states have call predecessors, (34), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:34:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-05-06 03:34:41,509 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 94 [2021-05-06 03:34:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:41,509 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-05-06 03:34:41,510 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), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:34:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-05-06 03:34:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 03:34:41,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:41,510 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] [2021-05-06 03:34:41,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:41,727 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:41,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:41,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1821891511, now seen corresponding path program 1 times [2021-05-06 03:34:41,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:41,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799015697] [2021-05-06 03:34:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:41,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:41,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354561797] [2021-05-06 03:34:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 03:34:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:34:41,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 03:34:41,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:41,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:41,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-05-06 03:34:42,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:42,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799015697] [2021-05-06 03:34:42,026 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:42,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354561797] [2021-05-06 03:34:42,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354561797] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:34:42,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:34:42,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:34:42,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892407307] [2021-05-06 03:34:42,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:34:42,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:34:42,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:34:42,028 INFO L87 Difference]: Start difference. First operand 141 states and 160 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) [2021-05-06 03:34:42,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:42,106 INFO L93 Difference]: Finished difference Result 191 states and 220 transitions. [2021-05-06 03:34:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:34:42,107 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 [2021-05-06 03:34:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:42,108 INFO L225 Difference]: With dead ends: 191 [2021-05-06 03:34:42,108 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 03:34:42,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:34:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 03:34:42,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-05-06 03:34:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 03:34:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2021-05-06 03:34:42,116 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 94 [2021-05-06 03:34:42,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:42,116 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2021-05-06 03:34:42,116 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) [2021-05-06 03:34:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2021-05-06 03:34:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 03:34:42,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:42,117 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:34:42,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:42,334 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash 799997287, now seen corresponding path program 4 times [2021-05-06 03:34:42,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:42,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589923205] [2021-05-06 03:34:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:42,341 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:42,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869478205] [2021-05-06 03:34:42,341 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 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 [2021-05-06 03:34:42,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:34:42,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:34:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 03:34:42,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:42,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 03:34:42,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:42,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589923205] [2021-05-06 03:34:42,579 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:42,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869478205] [2021-05-06 03:34:42,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869478205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:42,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:42,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:34:42,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803554090] [2021-05-06 03:34:42,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:34:42,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:42,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:34:42,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:34:42,581 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 03:34:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:42,760 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2021-05-06 03:34:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:34:42,760 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 98 [2021-05-06 03:34:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:42,762 INFO L225 Difference]: With dead ends: 168 [2021-05-06 03:34:42,762 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 03:34:42,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:34:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 03:34:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2021-05-06 03:34:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 106 states have internal predecessors, (112), 35 states have call successors, (35), 25 states have call predecessors, (35), 24 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:34:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2021-05-06 03:34:42,772 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 98 [2021-05-06 03:34:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:42,772 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2021-05-06 03:34:42,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 03:34:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2021-05-06 03:34:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 03:34:42,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:42,773 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 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] [2021-05-06 03:34:42,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 03:34:42,989 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 2 times [2021-05-06 03:34:42,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:42,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133230988] [2021-05-06 03:34:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:42,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:42,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576563983] [2021-05-06 03:34:42,998 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 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 [2021-05-06 03:34:43,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:34:43,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:34:43,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 03:34:43,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:43,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 03:34:43,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:43,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133230988] [2021-05-06 03:34:43,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:43,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576563983] [2021-05-06 03:34:43,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576563983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:43,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:43,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:34:43,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358262736] [2021-05-06 03:34:43,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:34:43,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:34:43,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:34:43,248 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 03:34:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:43,401 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2021-05-06 03:34:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:34:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-06 03:34:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:43,402 INFO L225 Difference]: With dead ends: 170 [2021-05-06 03:34:43,402 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 03:34:43,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:34:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 03:34:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 03:34:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 82 states have internal predecessors, (88), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 03:34:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2021-05-06 03:34:43,410 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 105 [2021-05-06 03:34:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:43,410 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2021-05-06 03:34:43,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 03:34:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2021-05-06 03:34:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 03:34:43,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:43,411 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:34:43,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 03:34:43,621 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:43,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:43,621 INFO L82 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 3 times [2021-05-06 03:34:43,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:43,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080620545] [2021-05-06 03:34:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:43,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:43,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323785615] [2021-05-06 03:34:43,627 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 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 [2021-05-06 03:34:43,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:34:43,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:34:43,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 03:34:43,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:43,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:43,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:43,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:43,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-05-06 03:34:43,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:43,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080620545] [2021-05-06 03:34:43,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:43,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323785615] [2021-05-06 03:34:43,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323785615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:43,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:43,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-06 03:34:43,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173525231] [2021-05-06 03:34:43,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:34:43,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:34:43,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:34:43,828 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 03:34:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:43,857 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2021-05-06 03:34:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:34:43,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 109 [2021-05-06 03:34:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:43,858 INFO L225 Difference]: With dead ends: 145 [2021-05-06 03:34:43,858 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 03:34:43,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:34:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 03:34:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 03:34:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 86 states have internal predecessors, (92), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 03:34:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2021-05-06 03:34:43,866 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 109 [2021-05-06 03:34:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:43,867 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2021-05-06 03:34:43,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 03:34:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2021-05-06 03:34:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 03:34:43,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:43,868 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:34:44,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 03:34:44,081 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:44,081 INFO L82 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 5 times [2021-05-06 03:34:44,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:44,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199225995] [2021-05-06 03:34:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:44,086 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:44,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284499010] [2021-05-06 03:34:44,087 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:44,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 03:34:44,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:34:44,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 03:34:44,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:44,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 03:34:44,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:44,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199225995] [2021-05-06 03:34:44,530 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:44,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284499010] [2021-05-06 03:34:44,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284499010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:44,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:44,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 03:34:44,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773439674] [2021-05-06 03:34:44,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 03:34:44,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:44,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 03:34:44,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:34:44,531 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 03:34:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:44,796 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2021-05-06 03:34:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:34:44,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 111 [2021-05-06 03:34:44,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:44,798 INFO L225 Difference]: With dead ends: 169 [2021-05-06 03:34:44,798 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 03:34:44,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:34:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 03:34:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2021-05-06 03:34:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 95 states have internal predecessors, (102), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:34:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2021-05-06 03:34:44,806 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 111 [2021-05-06 03:34:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:44,807 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2021-05-06 03:34:44,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 03:34:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2021-05-06 03:34:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 03:34:44,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:44,808 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:34:45,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:45,021 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash 567610840, now seen corresponding path program 6 times [2021-05-06 03:34:45,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:45,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614529021] [2021-05-06 03:34:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:45,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:45,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362535122] [2021-05-06 03:34:45,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:45,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 03:34:45,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:34:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 03:34:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:45,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 133 proven. 16 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-05-06 03:34:45,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:34:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614529021] [2021-05-06 03:34:45,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:34:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362535122] [2021-05-06 03:34:45,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362535122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:34:45,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:34:45,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:34:45,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044178783] [2021-05-06 03:34:45,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:34:45,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:34:45,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:34:45,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:34:45,312 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:34:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:34:45,447 INFO L93 Difference]: Finished difference Result 176 states and 200 transitions. [2021-05-06 03:34:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:34:45,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-05-06 03:34:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:34:45,449 INFO L225 Difference]: With dead ends: 176 [2021-05-06 03:34:45,449 INFO L226 Difference]: Without dead ends: 174 [2021-05-06 03:34:45,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:34:45,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-06 03:34:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 163. [2021-05-06 03:34:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 104 states have internal predecessors, (113), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 03:34:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2021-05-06 03:34:45,458 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 115 [2021-05-06 03:34:45,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:34:45,458 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2021-05-06 03:34:45,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:34:45,459 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2021-05-06 03:34:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 03:34:45,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:34:45,459 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:34:45,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 03:34:45,660 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:34:45,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:34:45,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1305935669, now seen corresponding path program 4 times [2021-05-06 03:34:45,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:34:45,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648897022] [2021-05-06 03:34:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:34:45,666 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:34:45,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403508141] [2021-05-06 03:34:45,666 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:34:45,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:34:45,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:34:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:34:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:34:45,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:45,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:46,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:34:47,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:36:38,362 WARN L205 SmtUtils]: Spent 1.83 m on a formula simplification. DAG size of input: 25308 DAG size of output: 24817 [2021-05-06 03:36:41,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:36:43,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:36:46,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:36,488 WARN L205 SmtUtils]: Spent 1.84 m on a formula simplification. DAG size of input: 25362 DAG size of output: 24864