/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/loop-invariants/linear-inequality-inv-a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:30:49,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:30:49,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:30:49,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:30:49,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:30:49,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:30:49,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:30:49,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:30:49,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:30:49,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:30:49,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:30:49,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:30:49,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:30:49,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:30:49,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:30:49,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:30:49,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:30:49,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:30:49,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:30:49,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:30:49,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:30:49,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:30:49,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:30:49,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:30:49,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:30:49,466 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:30:49,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:30:49,466 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:30:49,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:30:49,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:30:49,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:30:49,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:30:49,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:30:49,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:30:49,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:30:49,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:30:49,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:30:49,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:30:49,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:30:49,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:30:49,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:30:49,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:30:49,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:30:49,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:30:49,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:30:49,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:30:49,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:30:49,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:30:49,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:30:49,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:30:49,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:30:49,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:30:49,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:30:49,716 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:30:49,717 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:30:49,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2021-05-02 13:30:49,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f01ba8da/a1ef2a58d5de4cf9b4bba4112792886a/FLAGf27d23f2e [2021-05-02 13:30:50,147 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:30:50,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2021-05-02 13:30:50,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f01ba8da/a1ef2a58d5de4cf9b4bba4112792886a/FLAGf27d23f2e [2021-05-02 13:30:50,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f01ba8da/a1ef2a58d5de4cf9b4bba4112792886a [2021-05-02 13:30:50,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:30:50,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:30:50,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:30:50,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:30:50,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:30:50,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:30:50" (1/1) ... [2021-05-02 13:30:50,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fcb38ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50, skipping insertion in model container [2021-05-02 13:30:50,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:30:50" (1/1) ... [2021-05-02 13:30:50,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:30:50,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:30:50,289 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570] [2021-05-02 13:30:50,296 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626] [2021-05-02 13:30:50,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:30:50,305 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:30:50,316 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[557,570] [2021-05-02 13:30:50,318 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c[613,626] [2021-05-02 13:30:50,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:30:50,329 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:30:50,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50 WrapperNode [2021-05-02 13:30:50,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:30:50,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:30:50,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:30:50,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:30:50,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50" (1/1) ... [2021-05-02 13:30:50,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50" (1/1) ... [2021-05-02 13:30:50,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50" (1/1) ... [2021-05-02 13:30:50,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50" (1/1) ... [2021-05-02 13:30:50,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50" (1/1) ... [2021-05-02 13:30:50,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50" (1/1) ... [2021-05-02 13:30:50,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50" (1/1) ... [2021-05-02 13:30:50,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:30:50,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:30:50,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:30:50,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:30:50,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:30:50,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:30:50,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:30:50,465 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:30:50,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:30:50,465 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:30:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:30:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:30:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-05-02 13:30:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:30:50,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:30:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:30:50,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:30:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:30:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:30:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:30:50,686 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:30:50,686 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:30:50,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:30:50 BoogieIcfgContainer [2021-05-02 13:30:50,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:30:50,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:30:50,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:30:50,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:30:50,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:30:50" (1/3) ... [2021-05-02 13:30:50,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6750ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:30:50, skipping insertion in model container [2021-05-02 13:30:50,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:30:50" (2/3) ... [2021-05-02 13:30:50,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b6750ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:30:50, skipping insertion in model container [2021-05-02 13:30:50,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:30:50" (3/3) ... [2021-05-02 13:30:50,693 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2021-05-02 13:30:50,713 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:30:50,715 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-05-02 13:30:50,727 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-02 13:30:50,770 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:30:50,770 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:30:50,770 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:30:50,770 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:30:50,770 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:30:50,770 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:30:50,770 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:30:50,770 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:30:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:30:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-02 13:30:50,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:50,786 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:50,786 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:50,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:50,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1624254505, now seen corresponding path program 1 times [2021-05-02 13:30:50,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:50,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652763413] [2021-05-02 13:30:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:51,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:51,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:51,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652763413] [2021-05-02 13:30:51,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652763413] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:30:51,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:30:51,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:30:51,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987672333] [2021-05-02 13:30:51,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:30:51,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:51,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:30:51,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:30:51,052 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:51,124 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-05-02 13:30:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:30:51,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-05-02 13:30:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:51,130 INFO L225 Difference]: With dead ends: 29 [2021-05-02 13:30:51,131 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 13:30:51,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:30:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 13:30:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 13:30:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 13:30:51,155 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2021-05-02 13:30:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:51,155 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 13:30:51,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 13:30:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:30:51,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:51,156 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:51,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:30:51,156 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1187666007, now seen corresponding path program 1 times [2021-05-02 13:30:51,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:51,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242958764] [2021-05-02 13:30:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:51,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:51,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:51,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242958764] [2021-05-02 13:30:51,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242958764] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:51,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690212714] [2021-05-02 13:30:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:51,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:30:51,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:51,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690212714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:51,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:51,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 13:30:51,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760263989] [2021-05-02 13:30:51,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:30:51,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:51,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:30:51,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:30:51,349 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:51,452 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-02 13:30:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:30:51,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:30:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:51,453 INFO L225 Difference]: With dead ends: 27 [2021-05-02 13:30:51,453 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 13:30:51,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:30:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 13:30:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-05-02 13:30:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-02 13:30:51,457 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2021-05-02 13:30:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:51,457 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-02 13:30:51,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-02 13:30:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 13:30:51,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:51,458 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:51,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:30:51,676 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1115879670, now seen corresponding path program 1 times [2021-05-02 13:30:51,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:51,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125381551] [2021-05-02 13:30:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:51,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:51,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:51,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125381551] [2021-05-02 13:30:51,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125381551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:51,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853205851] [2021-05-02 13:30:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:51,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:30:51,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:51,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:51,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:51,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853205851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:51,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:51,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-02 13:30:51,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514692588] [2021-05-02 13:30:51,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:30:51,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:51,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:30:51,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:30:51,941 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:52,056 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 13:30:52,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:30:52,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 13:30:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:52,057 INFO L225 Difference]: With dead ends: 21 [2021-05-02 13:30:52,057 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 13:30:52,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:30:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 13:30:52,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 13:30:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 13:30:52,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2021-05-02 13:30:52,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:52,064 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 13:30:52,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 13:30:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 13:30:52,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:52,065 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:52,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:52,278 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:52,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1115928489, now seen corresponding path program 2 times [2021-05-02 13:30:52,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:52,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662528412] [2021-05-02 13:30:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:52,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:52,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662528412] [2021-05-02 13:30:52,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662528412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:52,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974448194] [2021-05-02 13:30:52,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:52,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:30:52,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:30:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 13:30:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:52,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:52,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:52,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974448194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:52,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:52,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 13:30:52,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716024296] [2021-05-02 13:30:52,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:30:52,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:52,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:30:52,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:30:52,565 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:52,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:52,805 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-05-02 13:30:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:30:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 13:30:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:52,807 INFO L225 Difference]: With dead ends: 29 [2021-05-02 13:30:52,807 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 13:30:52,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:30:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 13:30:52,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-05-02 13:30:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-02 13:30:52,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2021-05-02 13:30:52,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:52,819 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-02 13:30:52,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:52,820 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-02 13:30:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 13:30:52,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:52,820 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:53,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:53,037 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:53,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1332934410, now seen corresponding path program 2 times [2021-05-02 13:30:53,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:53,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782735062] [2021-05-02 13:30:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:53,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:53,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:53,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782735062] [2021-05-02 13:30:53,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782735062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:53,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441637351] [2021-05-02 13:30:53,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:53,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:30:53,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:30:53,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:30:53,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:53,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:53,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:53,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:53,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:53,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441637351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:53,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:53,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-02 13:30:53,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275368289] [2021-05-02 13:30:53,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:30:53,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:53,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:30:53,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:30:53,252 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:53,417 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-02 13:30:53,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:30:53,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 13:30:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:53,420 INFO L225 Difference]: With dead ends: 23 [2021-05-02 13:30:53,420 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 13:30:53,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:30:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 13:30:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 13:30:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 13:30:53,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2021-05-02 13:30:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:53,424 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 13:30:53,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 13:30:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 13:30:53,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:53,425 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:53,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:53,625 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:53,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1332885591, now seen corresponding path program 3 times [2021-05-02 13:30:53,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:53,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471838043] [2021-05-02 13:30:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:53,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:53,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:53,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471838043] [2021-05-02 13:30:53,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471838043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:53,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272841286] [2021-05-02 13:30:53,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:53,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:30:53,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:30:53,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 13:30:53,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:53,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:53,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:53,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:53,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:53,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272841286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:53,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:53,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 13:30:53,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480040987] [2021-05-02 13:30:53,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:30:53,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:53,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:30:53,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:30:53,969 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:54,293 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-05-02 13:30:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:30:54,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 13:30:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:54,294 INFO L225 Difference]: With dead ends: 31 [2021-05-02 13:30:54,294 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 13:30:54,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:30:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 13:30:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-05-02 13:30:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 13:30:54,298 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2021-05-02 13:30:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:54,298 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 13:30:54,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 13:30:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:30:54,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:54,298 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:54,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 13:30:54,509 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1001187082, now seen corresponding path program 3 times [2021-05-02 13:30:54,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:54,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411667687] [2021-05-02 13:30:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:54,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:54,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:54,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411667687] [2021-05-02 13:30:54,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411667687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:54,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819875013] [2021-05-02 13:30:54,611 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:54,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:30:54,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:30:54,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:30:54,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:54,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:54,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:54,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:54,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:54,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:54,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:54,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819875013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:54,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:54,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-02 13:30:54,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449253112] [2021-05-02 13:30:54,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:30:54,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:54,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:30:54,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:30:54,786 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:54,982 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-02 13:30:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:30:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 13:30:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:54,984 INFO L225 Difference]: With dead ends: 25 [2021-05-02 13:30:54,984 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 13:30:54,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:30:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 13:30:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-02 13:30:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 13:30:54,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2021-05-02 13:30:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:54,992 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 13:30:54,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 13:30:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:30:54,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:54,995 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:55,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:55,214 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:55,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:55,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1001138263, now seen corresponding path program 4 times [2021-05-02 13:30:55,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:55,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324691933] [2021-05-02 13:30:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:55,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:55,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:55,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324691933] [2021-05-02 13:30:55,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324691933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:55,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616421580] [2021-05-02 13:30:55,364 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:55,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:30:55,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:30:55,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:30:55,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:55,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:55,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:55,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:55,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:55,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:55,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:55,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616421580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:55,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:55,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 13:30:55,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048838119] [2021-05-02 13:30:55,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:30:55,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:55,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:30:55,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:30:55,575 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:55,994 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-05-02 13:30:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:30:55,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 13:30:55,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:55,995 INFO L225 Difference]: With dead ends: 33 [2021-05-02 13:30:55,995 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 13:30:55,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 459.4ms TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2021-05-02 13:30:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 13:30:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-05-02 13:30:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-05-02 13:30:55,998 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2021-05-02 13:30:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:55,999 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-05-02 13:30:55,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-05-02 13:30:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 13:30:55,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:55,999 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:56,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:56,202 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:56,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:56,203 INFO L82 PathProgramCache]: Analyzing trace with hash -19584778, now seen corresponding path program 4 times [2021-05-02 13:30:56,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:56,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833943455] [2021-05-02 13:30:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:56,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:56,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:56,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833943455] [2021-05-02 13:30:56,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833943455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:56,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121390562] [2021-05-02 13:30:56,317 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:56,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:30:56,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:30:56,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:30:56,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:56,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:56,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:56,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:56,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:56,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:56,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:56,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:56,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:56,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121390562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:56,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:56,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-02 13:30:56,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030036653] [2021-05-02 13:30:56,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:30:56,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:56,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:30:56,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:30:56,548 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:56,787 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-02 13:30:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:30:56,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 13:30:56,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:56,788 INFO L225 Difference]: With dead ends: 27 [2021-05-02 13:30:56,788 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 13:30:56,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-05-02 13:30:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 13:30:56,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 13:30:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 13:30:56,791 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2021-05-02 13:30:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:56,792 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 13:30:56,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 13:30:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 13:30:56,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:56,792 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:57,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 13:30:57,001 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:57,001 INFO L82 PathProgramCache]: Analyzing trace with hash -19535959, now seen corresponding path program 5 times [2021-05-02 13:30:57,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:57,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054221788] [2021-05-02 13:30:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:57,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:57,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:57,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054221788] [2021-05-02 13:30:57,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054221788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:57,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781605990] [2021-05-02 13:30:57,119 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:57,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 13:30:57,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:30:57,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:30:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:57,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:57,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:57,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:57,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:57,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:57,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:57,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:57,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:57,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781605990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:57,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:57,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 13:30:57,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583025015] [2021-05-02 13:30:57,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:30:57,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:30:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:30:57,567 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:58,040 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-05-02 13:30:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:30:58,041 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 13:30:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:58,041 INFO L225 Difference]: With dead ends: 35 [2021-05-02 13:30:58,041 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 13:30:58,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 558.6ms TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:30:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 13:30:58,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-05-02 13:30:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-05-02 13:30:58,044 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2021-05-02 13:30:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:58,045 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-05-02 13:30:58,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-05-02 13:30:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 13:30:58,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:58,045 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:58,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:58,255 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:58,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1592575754, now seen corresponding path program 5 times [2021-05-02 13:30:58,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:58,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325831321] [2021-05-02 13:30:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:58,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:58,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:58,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325831321] [2021-05-02 13:30:58,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325831321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:58,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092679689] [2021-05-02 13:30:58,396 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:58,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 13:30:58,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:30:58,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:30:58,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:58,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:58,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:58,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:58,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:58,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:58,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:58,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:58,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:58,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:58,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:58,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092679689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:58,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:58,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-02 13:30:58,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610667215] [2021-05-02 13:30:58,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:30:58,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:58,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:30:58,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:30:58,722 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:59,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:30:59,031 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-02 13:30:59,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:30:59,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 13:30:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:30:59,032 INFO L225 Difference]: With dead ends: 29 [2021-05-02 13:30:59,032 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 13:30:59,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:30:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 13:30:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 13:30:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 13:30:59,036 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2021-05-02 13:30:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:30:59,036 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 13:30:59,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:30:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 13:30:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 13:30:59,036 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:30:59,036 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:30:59,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:59,241 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:30:59,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:30:59,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1592526935, now seen corresponding path program 6 times [2021-05-02 13:30:59,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:30:59,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557527590] [2021-05-02 13:30:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:30:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:59,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:30:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:30:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:59,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:30:59,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557527590] [2021-05-02 13:30:59,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557527590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:59,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351709195] [2021-05-02 13:30:59,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:30:59,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 13:30:59,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:30:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:30:59,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:30:59,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:59,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:59,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:59,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:59,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:59,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:59,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:59,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:59,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:59,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:30:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:30:59,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351709195] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:30:59,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:30:59,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 13:30:59,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473340804] [2021-05-02 13:30:59,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:30:59,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:30:59,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:30:59,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:30:59,741 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:00,359 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-05-02 13:31:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:31:00,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 13:31:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:00,360 INFO L225 Difference]: With dead ends: 37 [2021-05-02 13:31:00,360 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 13:31:00,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 725.1ms TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2021-05-02 13:31:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 13:31:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-05-02 13:31:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-05-02 13:31:00,364 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-05-02 13:31:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:00,364 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-05-02 13:31:00,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-05-02 13:31:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:31:00,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:00,364 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:00,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 13:31:00,582 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:00,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:00,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1408415498, now seen corresponding path program 6 times [2021-05-02 13:31:00,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:00,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626006814] [2021-05-02 13:31:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:00,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:00,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:00,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626006814] [2021-05-02 13:31:00,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626006814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:00,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321355145] [2021-05-02 13:31:00,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:00,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 13:31:00,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:00,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:31:00,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:01,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:01,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321355145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:01,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:01,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-05-02 13:31:01,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580604419] [2021-05-02 13:31:01,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 13:31:01,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:01,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 13:31:01,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:31:01,322 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:01,973 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-02 13:31:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:31:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 13:31:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:01,975 INFO L225 Difference]: With dead ends: 31 [2021-05-02 13:31:01,976 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 13:31:01,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 871.8ms TimeCoverageRelationStatistics Valid=331, Invalid=599, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:31:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 13:31:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 13:31:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 13:31:01,981 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2021-05-02 13:31:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:01,981 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 13:31:01,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 13:31:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:31:01,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:01,983 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:02,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 13:31:02,187 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:02,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1408366679, now seen corresponding path program 7 times [2021-05-02 13:31:02,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:02,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186616525] [2021-05-02 13:31:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:02,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:02,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:02,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186616525] [2021-05-02 13:31:02,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186616525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:02,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172888614] [2021-05-02 13:31:02,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:02,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:31:02,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:02,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:02,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172888614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:02,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:02,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 13:31:02,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956690768] [2021-05-02 13:31:02,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 13:31:02,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:02,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 13:31:02,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:31:02,665 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:03,430 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-05-02 13:31:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:31:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 13:31:03,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:03,431 INFO L225 Difference]: With dead ends: 39 [2021-05-02 13:31:03,431 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 13:31:03,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 882.9ms TimeCoverageRelationStatistics Valid=382, Invalid=674, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 13:31:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 13:31:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-05-02 13:31:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-02 13:31:03,435 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2021-05-02 13:31:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:03,435 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-02 13:31:03,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-02 13:31:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:31:03,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:03,435 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:03,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 13:31:03,645 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash -524068618, now seen corresponding path program 7 times [2021-05-02 13:31:03,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:03,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400150598] [2021-05-02 13:31:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:03,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:03,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:03,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400150598] [2021-05-02 13:31:03,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400150598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:03,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768451460] [2021-05-02 13:31:03,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-05-02 13:31:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:03,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:31:03,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:03,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:03,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:03,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:03,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:03,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:04,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:04,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:04,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:04,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:04,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:04,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:04,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:04,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:04,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:04,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768451460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:04,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:04,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-05-02 13:31:04,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550981169] [2021-05-02 13:31:04,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 13:31:04,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:04,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 13:31:04,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:31:04,165 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:04,632 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-02 13:31:04,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:31:04,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 13:31:04,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:04,633 INFO L225 Difference]: With dead ends: 33 [2021-05-02 13:31:04,633 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 13:31:04,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 632.8ms TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 13:31:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 13:31:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 13:31:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 13:31:04,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2021-05-02 13:31:04,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:04,642 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 13:31:04,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 17 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:04,642 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 13:31:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:31:04,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:04,643 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:04,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:04,861 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:04,861 INFO L82 PathProgramCache]: Analyzing trace with hash -524019799, now seen corresponding path program 8 times [2021-05-02 13:31:04,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:04,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496166760] [2021-05-02 13:31:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:05,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:05,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:05,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496166760] [2021-05-02 13:31:05,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496166760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:05,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963661800] [2021-05-02 13:31:05,074 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 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 [2021-05-02 13:31:05,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:31:05,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:05,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:31:05,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:05,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:05,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963661800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:05,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:05,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 13:31:05,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516815477] [2021-05-02 13:31:05,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:31:05,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:05,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:31:05,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:31:05,417 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:06,332 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-05-02 13:31:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 13:31:06,333 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 13:31:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:06,333 INFO L225 Difference]: With dead ends: 41 [2021-05-02 13:31:06,333 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 13:31:06,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1110.7ms TimeCoverageRelationStatistics Valid=483, Invalid=849, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 13:31:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 13:31:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 13:31:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-02 13:31:06,337 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2021-05-02 13:31:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:06,337 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-02 13:31:06,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-02 13:31:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:31:06,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:06,337 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:06,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 13:31:06,538 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1070241546, now seen corresponding path program 8 times [2021-05-02 13:31:06,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:06,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516919695] [2021-05-02 13:31:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:06,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:06,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:06,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516919695] [2021-05-02 13:31:06,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516919695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:06,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230759376] [2021-05-02 13:31:06,786 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:06,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:31:06,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:06,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:31:06,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:06,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:06,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:06,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:06,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:06,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:06,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:06,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:06,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:07,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:07,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:07,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:07,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:07,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:07,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:07,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230759376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:07,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:07,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 20 [2021-05-02 13:31:07,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690776154] [2021-05-02 13:31:07,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:31:07,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:07,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:31:07,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:31:07,149 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:07,644 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-02 13:31:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 13:31:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 13:31:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:07,645 INFO L225 Difference]: With dead ends: 35 [2021-05-02 13:31:07,645 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 13:31:07,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 772.3ms TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 13:31:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 13:31:07,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 13:31:07,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 13:31:07,649 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2021-05-02 13:31:07,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:07,649 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 13:31:07,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 19 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 13:31:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:31:07,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:07,649 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:07,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 13:31:07,863 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1070192727, now seen corresponding path program 9 times [2021-05-02 13:31:07,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:07,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34542887] [2021-05-02 13:31:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:08,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:08,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:08,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34542887] [2021-05-02 13:31:08,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34542887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:08,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86718327] [2021-05-02 13:31:08,101 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:08,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 13:31:08,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:08,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:31:08,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:08,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:08,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86718327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:08,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:08,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 13:31:08,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215170589] [2021-05-02 13:31:08,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:31:08,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:08,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:31:08,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:31:08,795 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:09,710 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-05-02 13:31:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:31:09,711 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 13:31:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:09,711 INFO L225 Difference]: With dead ends: 43 [2021-05-02 13:31:09,711 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 13:31:09,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 16 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1164.9ms TimeCoverageRelationStatistics Valid=596, Invalid=1044, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:31:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 13:31:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-05-02 13:31:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-05-02 13:31:09,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2021-05-02 13:31:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:09,715 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-05-02 13:31:09,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-05-02 13:31:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:31:09,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:09,715 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:09,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 13:31:09,919 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1956415242, now seen corresponding path program 9 times [2021-05-02 13:31:09,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:09,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034813654] [2021-05-02 13:31:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:10,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:10,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034813654] [2021-05-02 13:31:10,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034813654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361044348] [2021-05-02 13:31:10,199 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:10,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 13:31:10,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:10,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 13:31:10,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:10,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:10,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:11,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:11,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361044348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:11,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:11,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-05-02 13:31:11,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137315760] [2021-05-02 13:31:11,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:31:11,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:11,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:31:11,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:31:11,020 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:11,617 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-02 13:31:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 13:31:11,624 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 13:31:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:11,624 INFO L225 Difference]: With dead ends: 37 [2021-05-02 13:31:11,624 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 13:31:11,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 925.2ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:31:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 13:31:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 13:31:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 13:31:11,627 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2021-05-02 13:31:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:11,628 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 13:31:11,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 21 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 13:31:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:31:11,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:11,628 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:11,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:11,831 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:11,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1956366423, now seen corresponding path program 10 times [2021-05-02 13:31:11,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:11,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969655492] [2021-05-02 13:31:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:12,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:12,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:12,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969655492] [2021-05-02 13:31:12,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969655492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:12,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352399272] [2021-05-02 13:31:12,121 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:12,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:31:12,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 13:31:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:12,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:12,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352399272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:12,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:12,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 13:31:12,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842334303] [2021-05-02 13:31:12,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 13:31:12,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:12,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 13:31:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:31:12,567 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:13,634 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-05-02 13:31:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 13:31:13,634 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 13:31:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:13,635 INFO L225 Difference]: With dead ends: 45 [2021-05-02 13:31:13,635 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 13:31:13,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1429.3ms TimeCoverageRelationStatistics Valid=721, Invalid=1259, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 13:31:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 13:31:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-05-02 13:31:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 13:31:13,639 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2021-05-02 13:31:13,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:13,639 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 13:31:13,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 13:31:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 13:31:13,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:13,639 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:13,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:13,841 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:13,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1129154806, now seen corresponding path program 10 times [2021-05-02 13:31:13,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:13,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882576950] [2021-05-02 13:31:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:14,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:14,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:14,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882576950] [2021-05-02 13:31:14,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882576950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:14,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534886281] [2021-05-02 13:31:14,123 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:14,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:31:14,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:14,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 13:31:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:14,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534886281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:14,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:14,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2021-05-02 13:31:14,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970823590] [2021-05-02 13:31:14,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 13:31:14,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 13:31:14,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:31:14,564 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:15,256 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-02 13:31:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 13:31:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 13:31:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:15,256 INFO L225 Difference]: With dead ends: 39 [2021-05-02 13:31:15,256 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 13:31:15,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1059.1ms TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 13:31:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 13:31:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 13:31:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 13:31:15,261 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2021-05-02 13:31:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:15,261 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 13:31:15,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 13:31:15,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 13:31:15,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:15,261 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:15,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 13:31:15,465 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:15,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1129203625, now seen corresponding path program 11 times [2021-05-02 13:31:15,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:15,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013142179] [2021-05-02 13:31:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:15,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:15,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:15,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013142179] [2021-05-02 13:31:15,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013142179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:15,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204400117] [2021-05-02 13:31:15,768 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:24,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 13:31:24,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:24,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 13:31:24,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:24,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:24,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204400117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:24,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:24,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 13:31:24,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772163949] [2021-05-02 13:31:24,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 13:31:24,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:24,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 13:31:24,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2021-05-02 13:31:24,982 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:26,201 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-05-02 13:31:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 13:31:26,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 13:31:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:26,203 INFO L225 Difference]: With dead ends: 47 [2021-05-02 13:31:26,203 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 13:31:26,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 12 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1602.7ms TimeCoverageRelationStatistics Valid=858, Invalid=1494, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:31:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 13:31:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-05-02 13:31:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-05-02 13:31:26,207 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2021-05-02 13:31:26,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:26,207 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-05-02 13:31:26,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-05-02 13:31:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:31:26,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:26,208 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:26,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 13:31:26,412 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1460430602, now seen corresponding path program 11 times [2021-05-02 13:31:26,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:26,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849206583] [2021-05-02 13:31:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:26,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:26,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:26,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:26,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849206583] [2021-05-02 13:31:26,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849206583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:26,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225191779] [2021-05-02 13:31:26,751 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:34,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 13:31:34,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:34,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 13:31:34,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:34,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:34,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225191779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:34,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:34,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-05-02 13:31:34,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926719833] [2021-05-02 13:31:34,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 13:31:34,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:34,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 13:31:34,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 13:31:34,698 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:35,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:35,415 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-02 13:31:35,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 13:31:35,415 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 13:31:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:35,415 INFO L225 Difference]: With dead ends: 41 [2021-05-02 13:31:35,415 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 13:31:35,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1216.9ms TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:31:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 13:31:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 13:31:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 13:31:35,419 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 33 [2021-05-02 13:31:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:35,419 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 13:31:35,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 25 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 13:31:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 13:31:35,420 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:35,420 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:35,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:35,624 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:35,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:35,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1460381783, now seen corresponding path program 12 times [2021-05-02 13:31:35,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:35,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056407036] [2021-05-02 13:31:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:35,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:35,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:35,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056407036] [2021-05-02 13:31:35,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056407036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:35,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790138905] [2021-05-02 13:31:35,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:37,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 13:31:37,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:37,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 13:31:37,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:37,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:37,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:38,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:38,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:38,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:38,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:38,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:38,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:38,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:38,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:38,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:38,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790138905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:38,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:31:38,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 13:31:38,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354226795] [2021-05-02 13:31:38,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:31:38,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:31:38,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:31:38,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:31:38,249 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:31:39,578 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-05-02 13:31:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 13:31:39,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 13:31:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:31:39,579 INFO L225 Difference]: With dead ends: 49 [2021-05-02 13:31:39,579 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 13:31:39,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 12 SyntacticMatches, 22 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1780.0ms TimeCoverageRelationStatistics Valid=1007, Invalid=1749, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 13:31:39,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 13:31:39,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 13:31:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 13:31:39,583 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 33 [2021-05-02 13:31:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:31:39,583 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 13:31:39,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:31:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 13:31:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 13:31:39,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:31:39,584 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:31:39,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 13:31:39,787 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:31:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:31:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1029023990, now seen corresponding path program 12 times [2021-05-02 13:31:39,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:31:39,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963252725] [2021-05-02 13:31:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:31:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:40,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:31:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:31:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:31:40,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:31:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963252725] [2021-05-02 13:31:40,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963252725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:31:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735404316] [2021-05-02 13:31:40,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:31:50,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 13:31:50,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:31:50,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 13:31:50,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:31:50,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:50,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:50,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:50,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:50,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:50,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:50,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:50,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:50,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:50,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:50,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:51,070 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 21 [2021-05-02 13:31:51,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:51,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:52,379 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 3321 DAG size of output: 1693 [2021-05-02 13:31:53,448 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 3321 DAG size of output: 1693 [2021-05-02 13:31:53,655 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 1693 [2021-05-02 13:31:55,693 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse247 (* c_main_~s~0 (- 1)))) (let ((.cse17 (div c_main_~s~0 (- 256))) (.cse7 (div (+ .cse247 3058) (- 256)))) (let ((.cse14 (div (+ c_main_~s~0 (- 2548)) 256)) (.cse21 (div (+ .cse247 1022) 256)) (.cse10 (div (+ .cse247 3570) (- 256))) (.cse18 (div (+ c_main_~s~0 257) 256)) (.cse246 (* .cse7 (- 1))) (.cse20 (div (+ .cse247 510) 256)) (.cse248 (* .cse17 (- 1)))) (let ((.cse8 (div (+ .cse248 23) (- 2))) (.cse40 (div (+ .cse20 .cse248 23) (- 2))) (.cse56 (div (+ .cse246 .cse248 14) (- 2))) (.cse81 (div (+ .cse18 21) (- 2))) (.cse42 (div (+ .cse247 765) 256)) (.cse57 (* 2 .cse10)) (.cse24 (* 2 .cse7)) (.cse90 (div (+ .cse20 .cse18 21) (- 2))) (.cse54 (* 2 .cse21)) (.cse11 (div (+ .cse246 .cse14 23) (- 2))) (.cse64 (div (+ .cse20 .cse14 32) (- 2))) (.cse104 (div (+ .cse246 .cse14 24) (- 2))) (.cse22 (div (+ c_main_~s~0 (- 3060)) 256)) (.cse30 (* 2 .cse17)) (.cse36 (div (+ c_main_~s~0 (- 255)) (- 256))) (.cse38 (div (+ .cse14 33) (- 2))) (.cse53 (* 2 .cse14)) (.cse84 (div (+ .cse14 32) (- 2))) (.cse120 (div (+ .cse20 .cse14 33) (- 2))) (.cse16 (div (+ c_main_~s~0 (- 512)) (- 256))) (.cse92 (div (+ .cse246 .cse248 13) (- 2))) (.cse15 (div (+ .cse246 .cse18 12) (- 2))) (.cse103 (div (+ .cse246 .cse14 22) (- 2))) (.cse1 (div (+ .cse247 253) (- 256))) (.cse35 (div (+ .cse246 .cse18 11) (- 2)))) (let ((.cse31 (+ .cse1 .cse35)) (.cse80 (+ .cse103 .cse10 .cse17 9)) (.cse95 (+ .cse10 .cse15 .cse17 9)) (.cse107 (+ .cse92 .cse17)) (.cse119 (+ .cse20 .cse21 13)) (.cse99 (+ .cse20 .cse14 2)) (.cse60 (+ .cse16 .cse10 .cse17 8)) (.cse88 (+ .cse120 .cse10 .cse17 9)) (.cse13 (+ .cse10 .cse84)) (.cse123 (+ .cse53 .cse21 12)) (.cse26 (+ .cse38 .cse17)) (.cse100 (+ .cse16 .cse10 .cse7 .cse17 18)) (.cse67 (+ .cse21 11)) (.cse159 (+ .cse10 .cse36 .cse17 9)) (.cse79 (+ .cse16 .cse7 .cse30 7)) (.cse87 (+ .cse20 .cse18 .cse22 2)) (.cse150 (+ .cse104 .cse17)) (.cse164 (+ .cse1 .cse64)) (.cse110 (+ .cse10 .cse11 .cse17 9)) (.cse137 (+ .cse16 .cse10 .cse7 9)) (.cse140 (+ .cse53 11)) (.cse55 (+ .cse14 .cse21 .cse22 21)) (.cse122 (+ .cse20 .cse14 .cse54 31)) (.cse111 (+ .cse10 .cse35 .cse17 9)) (.cse147 (+ .cse10 .cse90)) (.cse180 (+ .cse14 .cse21 21)) (.cse112 (+ .cse10 .cse24)) (.cse77 (+ .cse64 .cse17)) (.cse51 (+ .cse14 .cse22 12)) (.cse157 (+ .cse22 14)) (.cse131 (+ .cse57 .cse7 .cse17)) (.cse105 (+ .cse10 .cse11)) (.cse185 (+ .cse42 .cse18)) (.cse172 (+ .cse10 .cse81 .cse17 9)) (.cse138 (+ .cse42 .cse21 22)) (.cse43 (+ .cse1 .cse57 .cse17)) (.cse59 (+ .cse15 .cse17)) (.cse148 (+ .cse14 .cse54 21)) (.cse68 (+ .cse21 .cse22 11)) (.cse4 (+ .cse14 .cse54 32)) (.cse190 (+ .cse1 .cse15)) (.cse101 (+ .cse1 .cse10 .cse30)) (.cse62 (+ .cse20 .cse22 4)) (.cse128 (+ .cse10 .cse7 .cse17 9)) (.cse173 (+ .cse14 .cse21 .cse22 22)) (.cse160 (+ .cse81 .cse17)) (.cse85 (+ .cse1 .cse90)) (.cse124 (+ .cse1 .cse7 .cse17)) (.cse130 (+ .cse42 .cse14 12)) (.cse141 (+ .cse1 .cse56)) (.cse142 (+ .cse16 .cse10 .cse30 7)) (.cse162 (+ .cse57 .cse7 .cse30 7)) (.cse219 (+ .cse1 .cse84)) (.cse144 (+ .cse1 .cse104)) (.cse212 (+ .cse14 .cse21 .cse18)) (.cse208 (+ .cse1 .cse57)) (.cse97 (+ .cse1 .cse38)) (.cse114 (+ .cse16 .cse10 .cse7)) (.cse195 (+ .cse53 2)) (.cse183 (+ .cse64 .cse10)) (.cse145 (+ .cse1 .cse16 .cse17)) (.cse48 (+ .cse10 .cse40)) (.cse134 (+ .cse16 .cse10 .cse7 .cse30 16)) (.cse223 (+ .cse36 .cse17)) (.cse217 (+ .cse20 .cse21 2)) (.cse184 (+ .cse20 .cse18 .cse22 1)) (.cse118 (+ .cse20 .cse14 11)) (.cse209 (+ .cse10 .cse92)) (.cse143 (+ .cse56 .cse10)) (.cse129 (+ .cse10 .cse38)) (.cse179 (+ .cse20 .cse53 .cse21 21)) (.cse203 (+ .cse1 .cse81)) (.cse117 (+ .cse56 .cse17)) (.cse132 (+ .cse10 2)) (.cse187 (+ .cse21 13)) (.cse69 (+ .cse10 .cse38 .cse17 9)) (.cse91 (+ .cse1 .cse16 .cse7)) (.cse199 (+ .cse10 .cse84 .cse17 9)) (.cse215 (+ .cse16 .cse7 .cse17 9)) (.cse155 (+ .cse84 .cse17)) (.cse72 (+ .cse53 12)) (.cse193 (+ .cse103 .cse17)) (.cse206 (+ .cse1 .cse40)) (.cse135 (+ .cse7 .cse30)) (.cse161 (+ .cse54 11)) (.cse169 (+ .cse14 14)) (.cse213 (+ .cse11 .cse17)) (.cse116 (+ .cse10 .cse8)) (.cse186 (+ .cse16 .cse10 9)) (.cse126 (+ .cse1 .cse10 .cse7 .cse17)) (.cse178 (+ .cse14 .cse21)) (.cse106 (+ .cse54 21)) (.cse211 (+ .cse120 .cse17)) (.cse229 (+ .cse16 .cse7 .cse17)) (.cse232 (+ .cse10 .cse35)) (.cse66 (+ .cse10 .cse17 11)) (.cse220 (+ .cse17 2)) (.cse23 (+ .cse21 .cse18)) (.cse2 (+ .cse14 .cse21 22)) (.cse174 (+ .cse16 .cse30)) (.cse115 (+ .cse20 .cse21 11)) (.cse78 (+ .cse20 .cse14 .cse21 11)) (.cse89 (+ .cse42 3)) (.cse235 (+ .cse20 .cse21 .cse18 .cse22 10)) (.cse44 (+ .cse14 13)) (.cse136 (+ .cse1 .cse92)) (.cse204 (+ .cse40 .cse17)) (.cse214 (+ .cse20 .cse14 .cse22 13)) (.cse98 (+ .cse16 .cse10 .cse17)) (.cse196 (+ .cse1 .cse10 .cse7)) (.cse163 (+ .cse54 22)) (.cse189 (+ .cse20 .cse54 21)) (.cse58 (+ .cse14 3)) (.cse226 (+ .cse42 12)) (.cse167 (+ .cse1 .cse30)) (.cse198 (+ .cse35 .cse17)) (.cse93 (+ .cse103 .cse10)) (.cse153 (+ .cse8 .cse17)) (.cse231 (+ .cse53 .cse21 21)) (.cse222 (+ .cse14 .cse18 .cse22)) (.cse239 (+ .cse1 .cse16 .cse10 .cse17)) (.cse233 (+ .cse14 11)) (.cse65 (+ .cse21 .cse18 .cse22)) (.cse200 (+ .cse90 .cse17)) (.cse27 (+ .cse20 .cse21)) (.cse197 (+ .cse21 .cse18 .cse22 10)) (.cse238 (+ .cse10 .cse40 .cse17 9)) (.cse76 (+ .cse21 12)) (.cse205 (+ .cse1 .cse36)) (.cse182 (+ .cse1 .cse16 .cse10 .cse30 6)) (.cse125 (+ .cse10 .cse92 .cse17 9)) (.cse241 (+ .cse10 .cse15)) (.cse171 (+ .cse1 .cse16 .cse10 .cse17 8)) (.cse210 (+ .cse20 15)) (.cse139 (+ .cse57 .cse7)) (.cse230 (+ .cse1 .cse7 .cse30)) (.cse181 (+ .cse10 .cse81)) (.cse168 (+ .cse10 .cse7 .cse17)) (.cse152 (+ .cse20 4)) (.cse71 (+ .cse1 .cse16 .cse10)) (.cse221 (+ .cse20 .cse21 .cse18)) (.cse234 (+ .cse14 .cse21 9)) (.cse236 (+ .cse10 .cse90 .cse17 9)) (.cse201 (+ .cse56 .cse10 .cse17 9)) (.cse224 (+ .cse120 .cse10)) (.cse108 (+ .cse18 .cse22)) (.cse61 (+ .cse10 .cse7)) (.cse166 (+ .cse14 2)) (.cse46 (+ .cse14 .cse22 13)) (.cse176 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.cse30)) (.cse0 (+ .cse57 .cse17)) (.cse63 (+ .cse16 .cse10)) (.cse133 (+ .cse20 .cse14 .cse18)) (.cse9 (+ .cse14 .cse21 1)) (.cse243 (+ .cse1 .cse16 .cse30)) (.cse146 (+ .cse21 3)) (.cse33 (+ .cse18 .cse22 1)) (.cse12 (+ .cse14 1)) (.cse216 (+ .cse16 .cse10 .cse7 .cse17 7)) (.cse25 (+ .cse16 .cse7 7)) (.cse6 (+ .cse20 .cse18)) (.cse94 (+ .cse21 1)) (.cse39 (+ .cse20 .cse14 .cse21 10)) (.cse158 (+ .cse14 .cse18)) (.cse207 (+ .cse10 .cse104 .cse17 9)) (.cse5 (+ .cse16 .cse10 .cse17 9)) (.cse73 (+ .cse42 1)) (.cse50 (+ .cse1 .cse10)) (.cse177 (+ .cse14 12)) (.cse28 (+ .cse16 .cse17)) (.cse29 (* 2 .cse20)) (.cse34 (+ .cse14 .cse21 10)) (.cse242 (+ .cse1 .cse8)) (.cse45 (+ .cse1 .cse10 .cse17)) (.cse121 (+ .cse22 3)) (.cse32 (+ .cse10 .cse17)) (.cse82 (+ .cse10 .cse36)) (.cse74 (+ .cse1 .cse103)) (.cse86 (+ .cse14 .cse21 11)) (.cse19 (+ .cse7 .cse17)) (.cse102 (+ .cse22 4))) (and (< .cse0 2) (< .cse1 .cse2) (< .cse3 .cse4) (< .cse5 .cse6) (< (+ .cse7 .cse8) .cse9) (< (+ .cse1 .cse10 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.cse9) (< (+ .cse10 11) .cse18) (< .cse186 .cse18) (< (+ .cse57 .cse24 .cse17 7) .cse14) (< .cse126 5) (< .cse19 .cse178) (< (+ .cse16 .cse7 9) .cse23) (< .cse30 .cse106) (< .cse24 (+ .cse14 .cse21 14)) (< .cse19 (+ .cse21 .cse22 1)) (< .cse16 .cse78) (< .cse211 .cse27) (< .cse229 (+ .cse20 .cse14 .cse21 2)) (< .cse81 .cse34) (< (+ .cse10 .cse7 .cse30 18) 0) (< (+ .cse10 .cse15 .cse7 .cse17 18) 0) (< .cse41 (+ .cse20 .cse14 .cse21 .cse18 1)) (< .cse232 .cse14) (< .cse49 (+ .cse20 .cse14 14)) (< .cse66 .cse18) (< 0 .cse233) (< .cse220 .cse23) (< .cse17 .cse234) (< .cse45 .cse2) (< .cse16 (+ .cse42 .cse18 1)) (< .cse17 .cse235) (< (+ .cse1 .cse10 .cse92) .cse12) (< (+ .cse10 .cse84 9) 0) (< (+ .cse64 .cse7) .cse9) (< .cse1 (+ .cse14 .cse21 .cse18 .cse22 21)) (< .cse174 (+ .cse29 .cse21 2)) (< .cse32 .cse115) (< .cse35 .cse21) (< .cse168 .cse78) (< .cse168 .cse89) (< 0 .cse235) (< .cse16 .cse44) (< .cse136 3) (< (+ .cse7 .cse90 .cse17 9) .cse21) (< .cse236 0) (< .cse204 .cse21) (< .cse7 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.cse35) .cse9) (< .cse36 .cse21) (< .cse50 (+ .cse20 .cse14 .cse18 .cse22 11)) (< 0 (+ .cse42 .cse14 .cse22 22)) (< .cse38 .cse73) (< (+ .cse1 .cse103 .cse10 .cse17 8) 0) (< .cse7 .cse47) (< .cse1 (+ .cse20 .cse14 .cse21 .cse18 .cse22 21)) (< (+ .cse7 .cse84 7) 0) (< .cse225 .cse154) (< 0 (+ .cse29 .cse14 .cse21 .cse18 .cse22 20)) (< .cse7 .cse202) (< (+ .cse40 .cse7 .cse17 9) .cse21) (< .cse191 .cse22) (< .cse52 .cse83) (< .cse75 (+ .cse29 .cse21 12)) (< .cse7 .cse127) (< 0 .cse194) (< (+ .cse40 .cse7) .cse9) (< .cse3 3) (< 0 .cse188) (< .cse151 3) (< .cse165 4) (< .cse0 (+ .cse20 .cse14 12)) (< .cse64 .cse39) (< .cse120 .cse34) (< .cse63 .cse133) (< (+ .cse103 .cse7) .cse9) (< .cse243 .cse146) (< .cse10 .cse33) (< (+ .cse1 .cse10 .cse8) .cse12) (< (+ .cse1 .cse56 .cse17) .cse94) (< 0 (+ .cse53 .cse21 19)) (< .cse10 (+ .cse20 .cse53 .cse21 31)) (< .cse216 .cse14) (< .cse11 .cse73) (< .cse25 .cse6) (< (+ .cse7 .cse92 .cse17 9) .cse21) (< (+ .cse1 .cse36 .cse17) .cse94) (< (+ .cse1 .cse81 .cse17) .cse94) (< .cse84 .cse39) (< .cse103 .cse21) (< (+ .cse10 .cse7 11) .cse158) (< .cse207 0) (< .cse64 .cse73) (< .cse5 (+ .cse29 .cse18)) (< (+ .cse120 .cse10 9) 0) (< .cse35 .cse73) (< .cse50 .cse177) (< .cse28 (+ .cse29 .cse14 .cse21 11)) (< .cse84 .cse34) (< .cse242 3) (< .cse45 .cse121) (< .cse32 .cse14) (< .cse1 (+ .cse21 24)) (< (+ .cse40 .cse7 7) 0) (< .cse82 .cse14) (< .cse74 .cse86) (< (+ .cse1 .cse16 .cse7 6) .cse18) (< .cse19 .cse102) (< .cse64 .cse21))))))) is different from false [2021-05-02 13:31:56,168 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1701 DAG size of output: 1701 [2021-05-02 13:31:56,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:31:56,486 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 1706 DAG size of output: 1706 [2021-05-02 13:31:56,712 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 1707 DAG size of output: 1707