/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:38:38,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:38:38,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:38:38,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:38:38,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:38:38,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:38:38,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:38:38,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:38:38,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:38:38,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:38:38,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:38:38,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:38:38,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:38:38,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:38:38,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:38:38,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:38:38,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:38:38,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:38:38,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:38:38,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:38:38,567 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 03:38:38,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:38:38,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:38:38,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:38:38,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:38:38,595 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:38:38,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:38:38,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:38:38,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:38:38,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:38:38,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:38:38,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:38:38,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:38:38,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:38:38,597 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:38:38,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:38:38,598 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:38:38,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:38:38,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:38:38,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:38:38,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:38:38,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:38:38,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:38:38,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:38:38,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:38:38,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:38:38,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:38:38,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:38:38,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:38:38,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:38:38,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:38:38,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:38:38,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:38:38,948 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:38:38,949 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:38:38,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c [2021-05-06 03:38:39,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a9b20e9/8469e33be5bc4657a792bf8b6b8ec17f/FLAG3bda22787 [2021-05-06 03:38:39,391 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:38:39,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c [2021-05-06 03:38:39,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a9b20e9/8469e33be5bc4657a792bf8b6b8ec17f/FLAG3bda22787 [2021-05-06 03:38:39,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0a9b20e9/8469e33be5bc4657a792bf8b6b8ec17f [2021-05-06 03:38:39,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:38:39,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:38:39,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:38:39,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:38:39,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:38:39,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:38:39" (1/1) ... [2021-05-06 03:38:39,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697e3bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39, skipping insertion in model container [2021-05-06 03:38:39,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:38:39" (1/1) ... [2021-05-06 03:38:39,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:38:39,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:38:39,530 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_valuebound5.c[526,539] [2021-05-06 03:38:39,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:38:39,550 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:38:39,585 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_valuebound5.c[526,539] [2021-05-06 03:38:39,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:38:39,622 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:38:39,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39 WrapperNode [2021-05-06 03:38:39,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:38:39,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:38:39,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:38:39,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:38:39,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39" (1/1) ... [2021-05-06 03:38:39,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39" (1/1) ... [2021-05-06 03:38:39,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39" (1/1) ... [2021-05-06 03:38:39,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39" (1/1) ... [2021-05-06 03:38:39,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39" (1/1) ... [2021-05-06 03:38:39,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39" (1/1) ... [2021-05-06 03:38:39,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39" (1/1) ... [2021-05-06 03:38:39,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:38:39,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:38:39,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:38:39,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:38:39,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39" (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 03:38:39,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:38:39,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:38:39,739 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:38:39,739 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:38:39,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:38:39,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:38:39,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:38:39,740 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:38:39,740 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:38:39,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:38:39,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 03:38:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:38:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:38:39,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:38:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:38:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:38:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:38:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:38:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:38:39,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:38:40,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:38:40,017 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:38:40,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:38:40 BoogieIcfgContainer [2021-05-06 03:38:40,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:38:40,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:38:40,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:38:40,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:38:40,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:38:39" (1/3) ... [2021-05-06 03:38:40,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73996e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:38:40, skipping insertion in model container [2021-05-06 03:38:40,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:38:39" (2/3) ... [2021-05-06 03:38:40,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73996e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:38:40, skipping insertion in model container [2021-05-06 03:38:40,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:38:40" (3/3) ... [2021-05-06 03:38:40,024 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2021-05-06 03:38:40,031 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:38:40,035 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:38:40,046 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:38:40,069 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:38:40,069 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:38:40,069 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:38:40,069 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:38:40,069 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:38:40,069 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:38:40,070 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:38:40,070 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:38:40,101 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 03:38:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 03:38:40,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:40,107 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 03:38:40,107 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:40,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:40,112 INFO L82 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2021-05-06 03:38:40,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:40,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795439922] [2021-05-06 03:38:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:40,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:38:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:40,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:38:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:40,280 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 03:38:40,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:40,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795439922] [2021-05-06 03:38:40,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795439922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:38:40,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:38:40,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:38:40,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173438191] [2021-05-06 03:38:40,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:38:40,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:40,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:38:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:38:40,297 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 03:38:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:40,393 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2021-05-06 03:38:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:38:40,395 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 03:38:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:40,402 INFO L225 Difference]: With dead ends: 61 [2021-05-06 03:38:40,402 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 03:38:40,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:38:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 03:38:40,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 03:38:40,441 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 03:38:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 03:38:40,444 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 03:38:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:40,444 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 03:38:40,445 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 03:38:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 03:38:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 03:38:40,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:40,445 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 03:38:40,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:38:40,446 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:40,447 INFO L82 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2021-05-06 03:38:40,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:40,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512620572] [2021-05-06 03:38:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:40,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:38:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:40,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:38:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:40,561 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 03:38:40,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:40,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512620572] [2021-05-06 03:38:40,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512620572] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:38:40,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:38:40,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:38:40,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377020008] [2021-05-06 03:38:40,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:38:40,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:40,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:38:40,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:38:40,564 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 03:38:40,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:40,794 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-05-06 03:38:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:38:40,795 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 03:38:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:40,796 INFO L225 Difference]: With dead ends: 43 [2021-05-06 03:38:40,796 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 03:38:40,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:38:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 03:38:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 03:38:40,805 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 03:38:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 03:38:40,806 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 03:38:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:40,806 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 03:38:40,806 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 03:38:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 03:38:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 03:38:40,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:40,807 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 03:38:40,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:38:40,807 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:40,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2021-05-06 03:38:40,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:40,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176653792] [2021-05-06 03:38:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:40,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:38:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:40,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:38:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:40,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 03:38:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:40,907 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 03:38:40,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:40,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176653792] [2021-05-06 03:38:40,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176653792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:38:40,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:38:40,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:38:40,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019807248] [2021-05-06 03:38:40,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:38:40,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:38:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:38:40,909 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 03:38:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:41,110 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-06 03:38:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:38:41,111 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 03:38:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:41,112 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:38:41,112 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 03:38:41,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:38:41,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 03:38:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 03:38:41,118 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 03:38:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 03:38:41,119 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 03:38:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:41,119 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 03:38:41,119 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 03:38:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 03:38:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 03:38:41,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:41,120 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 03:38:41,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:38:41,120 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:41,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:41,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2021-05-06 03:38:41,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:41,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445812334] [2021-05-06 03:38:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:41,130 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:41,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571880170] [2021-05-06 03:38:41,131 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 03:38:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:41,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:38:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:41,283 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 03:38:41,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:41,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445812334] [2021-05-06 03:38:41,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:41,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571880170] [2021-05-06 03:38:41,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571880170] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:38:41,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:38:41,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:38:41,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003561737] [2021-05-06 03:38:41,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:38:41,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:41,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:38:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:38:41,286 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 03:38:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:41,333 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2021-05-06 03:38:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:38:41,333 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 03:38:41,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:41,334 INFO L225 Difference]: With dead ends: 66 [2021-05-06 03:38:41,334 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 03:38:41,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:38:41,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 03:38:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 03:38:41,343 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 03:38:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-06 03:38:41,344 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-06 03:38:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:41,344 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-06 03:38:41,344 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 03:38:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-06 03:38:41,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 03:38:41,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:41,345 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 03:38:41,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:38:41,567 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:41,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:41,567 INFO L82 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2021-05-06 03:38:41,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:41,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324924070] [2021-05-06 03:38:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:41,576 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:41,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678027094] [2021-05-06 03:38:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:38:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:41,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:38:41,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:41,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:41,719 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 03:38:41,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324924070] [2021-05-06 03:38:41,719 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:41,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678027094] [2021-05-06 03:38:41,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678027094] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:38:41,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:38:41,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:38:41,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064687040] [2021-05-06 03:38:41,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:38:41,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:41,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:38:41,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:38:41,721 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 03:38:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:41,784 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-05-06 03:38:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:38:41,785 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 03:38:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:41,786 INFO L225 Difference]: With dead ends: 65 [2021-05-06 03:38:41,786 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:38:41,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:38:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:38:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 03:38:41,796 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 03:38:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-05-06 03:38:41,797 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2021-05-06 03:38:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:41,797 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-05-06 03:38:41,798 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 03:38:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-05-06 03:38:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 03:38:41,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:41,799 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 03:38:42,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:38:42,025 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:42,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:42,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2021-05-06 03:38:42,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:42,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88125673] [2021-05-06 03:38:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:42,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:42,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028618711] [2021-05-06 03:38:42,034 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 03:38:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:38:42,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:42,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:42,247 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 03:38:42,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:42,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88125673] [2021-05-06 03:38:42,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:42,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028618711] [2021-05-06 03:38:42,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028618711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:42,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:42,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:38:42,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779616255] [2021-05-06 03:38:42,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:38:42,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:38:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:38:42,249 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 03:38:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:42,345 INFO L93 Difference]: Finished difference Result 105 states and 141 transitions. [2021-05-06 03:38:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:38:42,345 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 03:38:42,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:42,347 INFO L225 Difference]: With dead ends: 105 [2021-05-06 03:38:42,347 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 03:38:42,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:38:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 03:38:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 03:38:42,358 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 03:38:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-05-06 03:38:42,359 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 44 [2021-05-06 03:38:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:42,359 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-05-06 03:38:42,359 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 03:38:42,359 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-05-06 03:38:42,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 03:38:42,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:42,360 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 03:38:42,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:38:42,582 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:42,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:42,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1230656439, now seen corresponding path program 2 times [2021-05-06 03:38:42,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:42,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783370322] [2021-05-06 03:38:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:42,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:42,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934349638] [2021-05-06 03:38:42,590 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 03:38:42,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:38:42,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:38:42,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:38:42,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:42,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:42,794 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 03:38:42,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:42,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783370322] [2021-05-06 03:38:42,794 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:42,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934349638] [2021-05-06 03:38:42,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934349638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:42,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:42,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:38:42,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325328036] [2021-05-06 03:38:42,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:38:42,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:42,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:38:42,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:38:42,796 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 03:38:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:42,914 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2021-05-06 03:38:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:38:42,915 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 03:38:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:42,916 INFO L225 Difference]: With dead ends: 134 [2021-05-06 03:38:42,916 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 03:38:42,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:38:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 03:38:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 03:38:42,927 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 03:38:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2021-05-06 03:38:42,928 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 61 [2021-05-06 03:38:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:42,928 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2021-05-06 03:38:42,929 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 03:38:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2021-05-06 03:38:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 03:38:42,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:42,929 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 03:38:43,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:38:43,151 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:43,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:43,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2021-05-06 03:38:43,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:43,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107388814] [2021-05-06 03:38:43,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:43,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:43,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911288742] [2021-05-06 03:38:43,159 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 03:38:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:43,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 03:38:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:43,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:43,378 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 03:38:43,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:43,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107388814] [2021-05-06 03:38:43,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:43,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911288742] [2021-05-06 03:38:43,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911288742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:43,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:43,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:38:43,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855309508] [2021-05-06 03:38:43,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:38:43,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:38:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:38:43,380 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 03:38:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:43,485 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2021-05-06 03:38:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:38:43,485 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 03:38:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:43,486 INFO L225 Difference]: With dead ends: 127 [2021-05-06 03:38:43,486 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 03:38:43,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:38:43,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 03:38:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-06 03:38:43,497 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 03:38:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-05-06 03:38:43,498 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 64 [2021-05-06 03:38:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:43,499 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-05-06 03:38:43,499 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 03:38:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-05-06 03:38:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 03:38:43,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:43,500 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 03:38:43,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:38:43,719 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2021-05-06 03:38:43,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:43,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711064291] [2021-05-06 03:38:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:43,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:43,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113375228] [2021-05-06 03:38:43,740 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 03:38:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 03:38:43,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:44,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:44,027 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 03:38:44,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:44,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711064291] [2021-05-06 03:38:44,027 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:44,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113375228] [2021-05-06 03:38:44,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113375228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:44,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:44,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:38:44,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872155287] [2021-05-06 03:38:44,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:38:44,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:44,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:38:44,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:38:44,029 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 03:38:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:44,113 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2021-05-06 03:38:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:38:44,114 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 03:38:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:44,115 INFO L225 Difference]: With dead ends: 131 [2021-05-06 03:38:44,115 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 03:38:44,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:38:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 03:38:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 03:38:44,123 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 03:38:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 03:38:44,124 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 75 [2021-05-06 03:38:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:44,124 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 03:38:44,124 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 03:38:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 03:38:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 03:38:44,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:44,125 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 03:38:44,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:38:44,339 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:44,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:44,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1862740680, now seen corresponding path program 3 times [2021-05-06 03:38:44,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:44,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217575783] [2021-05-06 03:38:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:44,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:44,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632859900] [2021-05-06 03:38:44,346 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 03:38:44,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:38:44,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:38:44,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 03:38:44,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:44,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:44,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:44,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:44,558 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 03:38:44,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:44,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217575783] [2021-05-06 03:38:44,558 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:44,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632859900] [2021-05-06 03:38:44,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632859900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:44,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:44,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:38:44,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257837690] [2021-05-06 03:38:44,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:38:44,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:44,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:38:44,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:38:44,560 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 03:38:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:44,671 INFO L93 Difference]: Finished difference Result 123 states and 150 transitions. [2021-05-06 03:38:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:38:44,672 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 03:38:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:44,673 INFO L225 Difference]: With dead ends: 123 [2021-05-06 03:38:44,673 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 03:38:44,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:38:44,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 03:38:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 03:38:44,683 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 03:38:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-05-06 03:38:44,684 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 78 [2021-05-06 03:38:44,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:44,684 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-05-06 03:38:44,684 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 03:38:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-05-06 03:38:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 03:38:44,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:44,685 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 03:38:44,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:38:44,905 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:44,905 INFO L82 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 2 times [2021-05-06 03:38:44,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:44,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684870457] [2021-05-06 03:38:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:44,912 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:44,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453278053] [2021-05-06 03:38:44,913 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 03:38:44,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:38:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:38:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 03:38:44,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:45,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:45,123 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 03:38:45,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:45,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684870457] [2021-05-06 03:38:45,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:45,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453278053] [2021-05-06 03:38:45,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453278053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:45,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:45,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:38:45,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392833937] [2021-05-06 03:38:45,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:38:45,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:45,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:38:45,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:38:45,124 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 03:38:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:45,284 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-05-06 03:38:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:38:45,284 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 03:38:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:45,285 INFO L225 Difference]: With dead ends: 138 [2021-05-06 03:38:45,285 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 03:38:45,285 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:38:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 03:38:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 03:38:45,297 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 03:38:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2021-05-06 03:38:45,298 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 81 [2021-05-06 03:38:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:45,298 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2021-05-06 03:38:45,298 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 03:38:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2021-05-06 03:38:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 03:38:45,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:45,299 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 03:38:45,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:38:45,518 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:45,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:45,518 INFO L82 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 3 times [2021-05-06 03:38:45,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:45,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278036502] [2021-05-06 03:38:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:45,526 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:45,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4020179] [2021-05-06 03:38:45,526 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 03:38:45,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:38:45,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:38:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 03:38:45,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:45,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:45,855 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 03:38:45,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:45,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278036502] [2021-05-06 03:38:45,855 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:45,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4020179] [2021-05-06 03:38:45,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4020179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:45,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:45,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:38:45,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520528845] [2021-05-06 03:38:45,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:38:45,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:45,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:38:45,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:38:45,857 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 03:38:46,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:46,114 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2021-05-06 03:38:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:38:46,114 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 03:38:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:46,115 INFO L225 Difference]: With dead ends: 151 [2021-05-06 03:38:46,115 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 03:38:46,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:38:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 03:38:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-05-06 03:38:46,146 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 03:38:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-05-06 03:38:46,147 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 94 [2021-05-06 03:38:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:46,148 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-05-06 03:38:46,148 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 03:38:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-05-06 03:38:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 03:38:46,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:46,149 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 03:38:46,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:38:46,383 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:46,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1821891511, now seen corresponding path program 1 times [2021-05-06 03:38:46,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:46,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097298518] [2021-05-06 03:38:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:46,390 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:46,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600262661] [2021-05-06 03:38:46,390 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 03:38:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:46,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 03:38:46,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:46,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:46,684 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 03:38:46,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:46,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097298518] [2021-05-06 03:38:46,685 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:46,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600262661] [2021-05-06 03:38:46,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600262661] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:38:46,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:38:46,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:38:46,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965672360] [2021-05-06 03:38:46,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:38:46,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:46,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:38:46,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:38:46,686 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 03:38:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:46,764 INFO L93 Difference]: Finished difference Result 191 states and 220 transitions. [2021-05-06 03:38:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:38:46,764 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 03:38:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:46,765 INFO L225 Difference]: With dead ends: 191 [2021-05-06 03:38:46,765 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 03:38:46,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:38:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 03:38:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-05-06 03:38:46,774 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 03:38:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2021-05-06 03:38:46,774 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 94 [2021-05-06 03:38:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:46,774 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2021-05-06 03:38:46,774 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 03:38:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2021-05-06 03:38:46,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 03:38:46,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:46,775 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 03:38:46,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:38:46,994 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:46,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:46,994 INFO L82 PathProgramCache]: Analyzing trace with hash 799997287, now seen corresponding path program 4 times [2021-05-06 03:38:46,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:46,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564998731] [2021-05-06 03:38:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:47,000 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:47,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790060760] [2021-05-06 03:38:47,000 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 03:38:47,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:38:47,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:38:47,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 03:38:47,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:47,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:47,459 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 03:38:47,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:47,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564998731] [2021-05-06 03:38:47,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:47,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790060760] [2021-05-06 03:38:47,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790060760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:47,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:47,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:38:47,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892890795] [2021-05-06 03:38:47,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:38:47,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:38:47,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:38:47,465 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 03:38:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:47,744 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2021-05-06 03:38:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:38:47,744 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 03:38:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:47,746 INFO L225 Difference]: With dead ends: 168 [2021-05-06 03:38:47,746 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 03:38:47,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:38:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 03:38:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2021-05-06 03:38:47,773 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 03:38:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2021-05-06 03:38:47,774 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 98 [2021-05-06 03:38:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:47,774 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2021-05-06 03:38:47,775 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 03:38:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2021-05-06 03:38:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 03:38:47,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:47,776 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 03:38:47,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 03:38:47,998 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 2 times [2021-05-06 03:38:47,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:47,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394371284] [2021-05-06 03:38:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:48,006 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:48,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718530313] [2021-05-06 03:38:48,006 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 03:38:48,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:38:48,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:38:48,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 03:38:48,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:48,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:48,273 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 03:38:48,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:48,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394371284] [2021-05-06 03:38:48,273 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:48,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718530313] [2021-05-06 03:38:48,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718530313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:48,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:48,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:38:48,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094599550] [2021-05-06 03:38:48,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:38:48,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:48,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:38:48,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:38:48,275 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 03:38:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:48,425 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2021-05-06 03:38:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:38:48,426 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 03:38:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:48,427 INFO L225 Difference]: With dead ends: 170 [2021-05-06 03:38:48,427 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 03:38:48,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:38:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 03:38:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 03:38:48,435 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 03:38:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2021-05-06 03:38:48,436 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 105 [2021-05-06 03:38:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:48,436 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2021-05-06 03:38:48,456 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 03:38:48,456 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2021-05-06 03:38:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 03:38:48,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:48,457 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 03:38:48,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 03:38:48,677 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:48,678 INFO L82 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 3 times [2021-05-06 03:38:48,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:48,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487690297] [2021-05-06 03:38:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:48,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:48,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533650940] [2021-05-06 03:38:48,683 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 03:38:48,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:38:48,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:38:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 03:38:48,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:48,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:48,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:48,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:48,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:48,883 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 03:38:48,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:48,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487690297] [2021-05-06 03:38:48,883 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:48,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533650940] [2021-05-06 03:38:48,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533650940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:48,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:48,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-06 03:38:48,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089646882] [2021-05-06 03:38:48,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:38:48,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:48,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:38:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:38:48,884 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 03:38:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:48,911 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2021-05-06 03:38:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:38:48,911 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 03:38:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:48,912 INFO L225 Difference]: With dead ends: 145 [2021-05-06 03:38:48,912 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 03:38:48,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:38:48,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 03:38:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 03:38:48,920 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 03:38:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2021-05-06 03:38:48,921 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 109 [2021-05-06 03:38:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:48,921 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2021-05-06 03:38:48,921 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 03:38:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2021-05-06 03:38:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 03:38:48,922 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:48,922 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 03:38:49,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 03:38:49,141 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 5 times [2021-05-06 03:38:49,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:49,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879157967] [2021-05-06 03:38:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:49,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:49,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341227649] [2021-05-06 03:38:49,154 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 03:38:49,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 03:38:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:38:49,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 03:38:49,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:49,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:49,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 03:38:50,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:38:50,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879157967] [2021-05-06 03:38:50,031 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:38:50,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341227649] [2021-05-06 03:38:50,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341227649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:38:50,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:38:50,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 03:38:50,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979466274] [2021-05-06 03:38:50,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 03:38:50,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:38:50,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 03:38:50,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:38:50,032 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 03:38:50,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:38:50,508 INFO L93 Difference]: Finished difference Result 172 states and 205 transitions. [2021-05-06 03:38:50,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 03:38:50,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 111 [2021-05-06 03:38:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:38:50,510 INFO L225 Difference]: With dead ends: 172 [2021-05-06 03:38:50,510 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 03:38:50,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-05-06 03:38:50,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 03:38:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2021-05-06 03:38:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 03:38:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2021-05-06 03:38:50,522 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 111 [2021-05-06 03:38:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:38:50,523 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2021-05-06 03:38:50,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 03:38:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2021-05-06 03:38:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 03:38:50,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:38:50,524 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:38:50,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:38:50,749 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:38:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:38:50,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1400683725, now seen corresponding path program 1 times [2021-05-06 03:38:50,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:38:50,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612947743] [2021-05-06 03:38:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:38:50,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:38:50,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81644261] [2021-05-06 03:38:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 03:38:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:38:50,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:38:50,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:38:50,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:50,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:38:51,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:52:09,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:52:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612947743] [2021-05-06 03:52:09,139 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:52:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81644261] [2021-05-06 03:52:09,139 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Size of result too large: 5661211248 xjuncts [2021-05-06 03:52:09,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:52:09,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-06 03:52:09,139 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-06 03:52:09,139 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 03:52:09,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 03:52:09,377 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 03:52:09,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 03:52:09 BoogieIcfgContainer [2021-05-06 03:52:09,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 03:52:09,390 INFO L168 Benchmark]: Toolchain (without parser) took 809976.16 ms. Allocated memory was 210.8 MB in the beginning and 6.2 GB in the end (delta: 6.0 GB). Free memory was 174.9 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 4.3 GB. Max. memory is 8.0 GB. [2021-05-06 03:52:09,390 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 210.8 MB. Free memory was 191.7 MB in the beginning and 191.5 MB in the end (delta: 139.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 03:52:09,390 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.38 ms. Allocated memory is still 210.8 MB. Free memory was 174.7 MB in the beginning and 192.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-06 03:52:09,390 INFO L168 Benchmark]: Boogie Preprocessor took 34.16 ms. Allocated memory is still 210.8 MB. Free memory was 192.5 MB in the beginning and 191.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 03:52:09,390 INFO L168 Benchmark]: RCFGBuilder took 360.09 ms. Allocated memory is still 210.8 MB. Free memory was 191.0 MB in the beginning and 174.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 03:52:09,390 INFO L168 Benchmark]: TraceAbstraction took 809357.95 ms. Allocated memory was 210.8 MB in the beginning and 6.2 GB in the end (delta: 6.0 GB). Free memory was 174.7 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 4.3 GB. Max. memory is 8.0 GB. [2021-05-06 03:52:09,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 210.8 MB. Free memory was 191.7 MB in the beginning and 191.5 MB in the end (delta: 139.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 207.38 ms. Allocated memory is still 210.8 MB. Free memory was 174.7 MB in the beginning and 192.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.16 ms. Allocated memory is still 210.8 MB. Free memory was 192.5 MB in the beginning and 191.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 360.09 ms. Allocated memory is still 210.8 MB. Free memory was 191.0 MB in the beginning and 174.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 809357.95 ms. Allocated memory was 210.8 MB in the beginning and 6.2 GB in the end (delta: 6.0 GB). Free memory was 174.7 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 4.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] int A, B; [L24] int r, d, p, q; [L25] A = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(A>=0 && A<=5) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=5) [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(q == 0) [L36] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(r == A) [L37] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(d == B * p) [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(q == 0) [L36] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(r == A) [L37] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(d == B * p) [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(q == 0) [L36] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(r == A) [L37] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(d == B * p) [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(q == 0) [L36] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(r == A) [L37] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(d == B * p) [L38] COND TRUE !(r >= d) [L44] COND TRUE 1 [L45] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L45] RET __VERIFIER_assert(A == q*B + r) [L46] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(d == B*p) [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p [L44] COND TRUE 1 [L45] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L45] RET __VERIFIER_assert(A == q*B + r) [L46] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(d == B*p) [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND FALSE !(r >= d) [L44] COND TRUE 1 [L45] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L45] RET __VERIFIER_assert(A == q*B + r) [L46] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(d == B*p) [L48] COND TRUE !(p != 1) [L58] CALL __VERIFIER_assert(A == d*q + r) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 809291.1ms, OverallIterations: 18, TraceHistogramMax: 19, EmptinessCheckTime: 34.2ms, AutomataDifference: 2647.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 763 SDtfs, 247 SDslu, 2807 SDs, 0 SdLazy, 2091 SolverSat, 245 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1397.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1117 GetRequests, 998 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1234.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=14, InterpolantAutomatonStates: 121, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 219.0ms AutomataMinimizationTime, 17 MinimizatonAttempts, 57 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 113.7ms SsaConstructionTime, 460.3ms SatisfiabilityAnalysisTime, 3255.7ms InterpolantComputationTime, 1131 NumberOfCodeBlocks, 1026 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1114 ConstructedInterpolants, 0 QuantifiedInterpolants, 5195 SizeOfPredicates, 30 NumberOfNonLiveVariables, 2884 ConjunctsInSsa, 296 ConjunctsInUnsatCore, 17 InterpolantComputations, 6 PerfectInterpolantSequences, 3663/3818 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...