/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:51:56,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:51:56,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:51:56,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:51:56,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:51:56,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:51:56,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:51:56,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:51:56,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:51:56,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:51:56,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:51:56,430 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:51:56,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:51:56,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:51:56,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:51:56,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:51:56,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:51:56,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:51:56,431 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:51:56,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:51:56,432 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:51:56,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:51:56,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:51:56,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:51:56,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:51:56,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:51:56,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:51:56,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:51:56,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:51:56,433 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:51:56,433 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:51:56,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:51:56,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:51:56,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:51:56,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:51:56,727 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:51:56,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2021-05-02 17:51:56,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061f3a865/db30d4544a954eb292bade9b25cbd332/FLAG34fd06206 [2021-05-02 17:51:57,105 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:51:57,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2021-05-02 17:51:57,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061f3a865/db30d4544a954eb292bade9b25cbd332/FLAG34fd06206 [2021-05-02 17:51:57,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/061f3a865/db30d4544a954eb292bade9b25cbd332 [2021-05-02 17:51:57,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:51:57,523 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:51:57,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:57,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:51:57,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:51:57,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:57" (1/1) ... [2021-05-02 17:51:57,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34d94ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57, skipping insertion in model container [2021-05-02 17:51:57,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:57" (1/1) ... [2021-05-02 17:51:57,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:51:57,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:51:57,640 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-acceleration/array_4.i[848,861] [2021-05-02 17:51:57,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:57,654 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:51:57,695 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-acceleration/array_4.i[848,861] [2021-05-02 17:51:57,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:57,706 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:51:57,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57 WrapperNode [2021-05-02 17:51:57,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:57,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:51:57,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:51:57,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:51:57,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57" (1/1) ... [2021-05-02 17:51:57,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57" (1/1) ... [2021-05-02 17:51:57,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57" (1/1) ... [2021-05-02 17:51:57,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57" (1/1) ... [2021-05-02 17:51:57,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57" (1/1) ... [2021-05-02 17:51:57,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57" (1/1) ... [2021-05-02 17:51:57,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57" (1/1) ... [2021-05-02 17:51:57,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:51:57,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:51:57,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:51:57,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:51:57,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57" (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 17:51:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:51:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:51:57,771 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:51:57,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:51:57,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 17:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 17:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:51:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:51:57,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:51:57,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:51:57,924 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 17:51:57,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:57 BoogieIcfgContainer [2021-05-02 17:51:57,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:51:57,925 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:51:57,925 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:51:57,926 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:51:57,927 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:57" (1/1) ... [2021-05-02 17:51:57,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:57 BasicIcfg [2021-05-02 17:51:57,951 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:51:57,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:51:57,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:51:57,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:51:57,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:51:57" (1/4) ... [2021-05-02 17:51:57,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534d212d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:57, skipping insertion in model container [2021-05-02 17:51:57,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:57" (2/4) ... [2021-05-02 17:51:57,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534d212d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:57, skipping insertion in model container [2021-05-02 17:51:57,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:57" (3/4) ... [2021-05-02 17:51:57,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534d212d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:51:57, skipping insertion in model container [2021-05-02 17:51:57,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:57" (4/4) ... [2021-05-02 17:51:57,955 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.iJordan [2021-05-02 17:51:57,958 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:51:57,961 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:51:57,971 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:51:57,983 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:51:57,983 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:51:57,983 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:51:57,983 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:51:57,984 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:51:57,984 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:51:57,984 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:51:57,984 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:51:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:51:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 17:51:58,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:58,011 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:58,011 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:58,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1408461327, now seen corresponding path program 1 times [2021-05-02 17:51:58,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:58,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677661504] [2021-05-02 17:51:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,218 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 17:51:58,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:58,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677661504] [2021-05-02 17:51:58,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677661504] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:58,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:58,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:51:58,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095126943] [2021-05-02 17:51:58,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:51:58,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:58,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:51:58,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:58,235 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 17:51:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:58,286 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-05-02 17:51:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:51:58,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 17:51:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:58,292 INFO L225 Difference]: With dead ends: 24 [2021-05-02 17:51:58,292 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 17:51:58,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 17:51:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 17:51:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 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 17:51:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 17:51:58,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-05-02 17:51:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:58,314 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 17:51:58,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 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 17:51:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 17:51:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 17:51:58,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:58,315 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:58,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:51:58,315 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:58,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:58,317 INFO L82 PathProgramCache]: Analyzing trace with hash 999614691, now seen corresponding path program 1 times [2021-05-02 17:51:58,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:58,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751152049] [2021-05-02 17:51:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,417 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 17:51:58,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:58,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751152049] [2021-05-02 17:51:58,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751152049] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:58,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:58,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:51:58,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281674065] [2021-05-02 17:51:58,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:51:58,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:51:58,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:58,423 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 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 17:51:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:58,461 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-02 17:51:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:51:58,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 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 14 [2021-05-02 17:51:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:58,464 INFO L225 Difference]: With dead ends: 23 [2021-05-02 17:51:58,464 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 17:51:58,465 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 17:51:58,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-05-02 17:51:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 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 17:51:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-02 17:51:58,473 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2021-05-02 17:51:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:58,473 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-02 17:51:58,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 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 17:51:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-02 17:51:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 17:51:58,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:58,475 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:58,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:51:58,475 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1202562811, now seen corresponding path program 1 times [2021-05-02 17:51:58,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:58,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552364131] [2021-05-02 17:51:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,562 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 17:51:58,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:58,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552364131] [2021-05-02 17:51:58,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552364131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67798769] [2021-05-02 17:51:58,563 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 17:51:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 17:51:58,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:58,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,678 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 17:51:58,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67798769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:58,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 17:51:58,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539490429] [2021-05-02 17:51:58,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:51:58,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:58,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:51:58,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:58,680 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:58,712 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 17:51:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:51:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 17:51:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:58,713 INFO L225 Difference]: With dead ends: 29 [2021-05-02 17:51:58,713 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 17:51:58,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 17:51:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-05-02 17:51:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 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 17:51:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-02 17:51:58,717 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-05-02 17:51:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:58,717 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-02 17:51:58,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-02 17:51:58,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:51:58,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:58,718 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:58,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:51:58,933 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:58,934 INFO L82 PathProgramCache]: Analyzing trace with hash -76265305, now seen corresponding path program 2 times [2021-05-02 17:51:58,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:58,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840336970] [2021-05-02 17:51:58,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:51:59,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840336970] [2021-05-02 17:51:59,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840336970] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:59,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:59,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:51:59,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574435902] [2021-05-02 17:51:59,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:51:59,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:59,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:51:59,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:59,018 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 17:51:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:59,088 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-05-02 17:51:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:51:59,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 18 [2021-05-02 17:51:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:59,091 INFO L225 Difference]: With dead ends: 26 [2021-05-02 17:51:59,091 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 17:51:59,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 17:51:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-05-02 17:51:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 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 17:51:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 17:51:59,096 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-05-02 17:51:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:59,096 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 17:51:59,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 17:51:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 17:51:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 17:51:59,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:59,097 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:59,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 17:51:59,097 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:59,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1853653679, now seen corresponding path program 1 times [2021-05-02 17:51:59,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:59,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118542761] [2021-05-02 17:51:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:51:59,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:59,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118542761] [2021-05-02 17:51:59,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118542761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839668616] [2021-05-02 17:51:59,176 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 17:51:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 17:51:59,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:59,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 17:51:59,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839668616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:59,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-05-02 17:51:59,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709357280] [2021-05-02 17:51:59,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:51:59,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:59,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:51:59,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:51:59,273 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:59,365 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-05-02 17:51:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:51:59,366 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 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 17:51:59,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:59,366 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:51:59,366 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 17:51:59,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 17:51:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-05-02 17:51:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 states have call successors, (3), 3 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 17:51:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-02 17:51:59,369 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 21 [2021-05-02 17:51:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:59,369 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-02 17:51:59,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-02 17:51:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 17:51:59,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:59,370 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:59,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:59,585 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2127426735, now seen corresponding path program 2 times [2021-05-02 17:51:59,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:59,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263871553] [2021-05-02 17:51:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:51:59,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:59,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263871553] [2021-05-02 17:51:59,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263871553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357070018] [2021-05-02 17:51:59,671 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 17:51:59,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:59,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:51:59,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:59,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:51:59,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357070018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:59,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 17:51:59,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887401039] [2021-05-02 17:51:59,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:51:59,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:59,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:51:59,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:59,793 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:59,835 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-02 17:51:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:51:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 17:51:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:59,836 INFO L225 Difference]: With dead ends: 38 [2021-05-02 17:51:59,836 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 17:51:59,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:59,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 17:51:59,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-05-02 17:51:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 3 states have call successors, (3), 3 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 17:51:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-02 17:51:59,838 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2021-05-02 17:51:59,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:59,839 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-02 17:51:59,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:51:59,839 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-02 17:51:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 17:51:59,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:59,839 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:00,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:00,055 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash 383908941, now seen corresponding path program 3 times [2021-05-02 17:52:00,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:00,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754317306] [2021-05-02 17:52:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:00,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:52:00,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:00,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754317306] [2021-05-02 17:52:00,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754317306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:00,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989415042] [2021-05-02 17:52:00,144 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 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 17:52:00,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:52:00,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:52:00,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:00,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:52:00,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989415042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:00,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:00,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-02 17:52:00,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650298191] [2021-05-02 17:52:00,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:52:00,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:00,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:52:00,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:52:00,287 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:00,385 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-05-02 17:52:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:52:00,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 4 states have call predecessors, (5), 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 17:52:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:00,386 INFO L225 Difference]: With dead ends: 46 [2021-05-02 17:52:00,386 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 17:52:00,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:52:00,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 17:52:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 17:52:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 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 17:52:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 17:52:00,389 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2021-05-02 17:52:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:00,389 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 17:52:00,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 17:52:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 17:52:00,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:00,390 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:00,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:00,601 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:00,601 INFO L82 PathProgramCache]: Analyzing trace with hash 683964715, now seen corresponding path program 4 times [2021-05-02 17:52:00,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:00,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54447354] [2021-05-02 17:52:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:00,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:00,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:00,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54447354] [2021-05-02 17:52:00,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54447354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:00,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514667210] [2021-05-02 17:52:00,670 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 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 17:52:00,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:00,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:00,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:52:00,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:00,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:00,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514667210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:00,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:00,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 17:52:00,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443629507] [2021-05-02 17:52:00,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:52:00,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:00,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:52:00,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:52:00,794 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:00,852 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-02 17:52:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:52:00,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 17:52:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:00,853 INFO L225 Difference]: With dead ends: 48 [2021-05-02 17:52:00,853 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:52:00,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:52:00,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:52:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-05-02 17:52:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 3 states have call successors, (3), 3 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 17:52:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-05-02 17:52:00,855 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2021-05-02 17:52:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:00,855 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-05-02 17:52:00,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-05-02 17:52:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 17:52:00,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:00,865 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:01,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:01,084 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash -572386487, now seen corresponding path program 5 times [2021-05-02 17:52:01,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:01,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145083911] [2021-05-02 17:52:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:01,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145083911] [2021-05-02 17:52:01,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145083911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233323984] [2021-05-02 17:52:01,156 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 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 17:52:01,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 17:52:01,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:01,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:52:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:01,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:01,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233323984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:01,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 17:52:01,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410372734] [2021-05-02 17:52:01,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:52:01,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:01,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:52:01,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:52:01,306 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:01,377 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-05-02 17:52:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:52:01,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 17:52:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:01,378 INFO L225 Difference]: With dead ends: 54 [2021-05-02 17:52:01,378 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 17:52:01,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:52:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 17:52:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2021-05-02 17:52:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 3 states have call successors, (3), 3 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 17:52:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-05-02 17:52:01,381 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2021-05-02 17:52:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:01,381 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-05-02 17:52:01,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-05-02 17:52:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 17:52:01,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:01,382 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:01,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:01,583 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:01,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1040081433, now seen corresponding path program 6 times [2021-05-02 17:52:01,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:01,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955975861] [2021-05-02 17:52:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:01,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:01,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955975861] [2021-05-02 17:52:01,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955975861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315139870] [2021-05-02 17:52:01,660 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 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 17:52:01,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-02 17:52:01,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:01,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 17:52:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:01,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315139870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:01,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 17:52:01,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116631110] [2021-05-02 17:52:01,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:52:01,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:01,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:52:01,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:52:01,823 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:01,880 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-05-02 17:52:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:52:01,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 17:52:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:01,881 INFO L225 Difference]: With dead ends: 60 [2021-05-02 17:52:01,882 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 17:52:01,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:52:01,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 17:52:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2021-05-02 17:52:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 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 17:52:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-05-02 17:52:01,887 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2021-05-02 17:52:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:01,888 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-05-02 17:52:01,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-05-02 17:52:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 17:52:01,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:01,890 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:02,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:52:02,097 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash 476641541, now seen corresponding path program 7 times [2021-05-02 17:52:02,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:02,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40562276] [2021-05-02 17:52:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:02,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:02,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40562276] [2021-05-02 17:52:02,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40562276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:02,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318466170] [2021-05-02 17:52:02,181 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 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 17:52:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:52:02,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:02,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:02,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318466170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:02,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:02,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 17:52:02,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713276815] [2021-05-02 17:52:02,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:52:02,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:02,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:52:02,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:52:02,310 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:02,371 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-05-02 17:52:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:52:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-02 17:52:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:02,372 INFO L225 Difference]: With dead ends: 66 [2021-05-02 17:52:02,372 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 17:52:02,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:52:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 17:52:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-05-02 17:52:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 3 states have call successors, (3), 3 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 17:52:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-02 17:52:02,375 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2021-05-02 17:52:02,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:02,375 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-02 17:52:02,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-02 17:52:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 17:52:02,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:02,375 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:02,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 17:52:02,589 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2053506211, now seen corresponding path program 8 times [2021-05-02 17:52:02,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:02,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100086918] [2021-05-02 17:52:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:02,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:02,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100086918] [2021-05-02 17:52:02,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100086918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:02,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993420385] [2021-05-02 17:52:02,670 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 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 17:52:02,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:02,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:02,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 17:52:02,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:02,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:02,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993420385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:02,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:02,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 17:52:02,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216364109] [2021-05-02 17:52:02,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 17:52:02,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:02,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 17:52:02,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:52:02,828 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:02,887 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-05-02 17:52:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 17:52:02,888 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 17:52:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:02,888 INFO L225 Difference]: With dead ends: 72 [2021-05-02 17:52:02,888 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 17:52:02,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:52:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 17:52:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-05-02 17:52:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 3 states have call successors, (3), 3 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 17:52:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-05-02 17:52:02,891 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2021-05-02 17:52:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:02,891 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-05-02 17:52:02,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-05-02 17:52:02,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 17:52:02,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:02,891 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:03,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:03,109 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:03,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1296998593, now seen corresponding path program 9 times [2021-05-02 17:52:03,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:03,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684356956] [2021-05-02 17:52:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:03,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:52:03,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:03,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684356956] [2021-05-02 17:52:03,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684356956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:03,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435738063] [2021-05-02 17:52:03,214 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 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 17:52:03,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 17:52:03,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:03,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:52:03,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:03,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 17:52:03,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435738063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:03,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:03,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 17 [2021-05-02 17:52:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268874266] [2021-05-02 17:52:03,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 17:52:03,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:03,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 17:52:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:52:03,363 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:03,501 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-05-02 17:52:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:52:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-02 17:52:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:03,502 INFO L225 Difference]: With dead ends: 80 [2021-05-02 17:52:03,502 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 17:52:03,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:52:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 17:52:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-05-02 17:52:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 3 states have call successors, (3), 3 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 17:52:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-05-02 17:52:03,505 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 49 [2021-05-02 17:52:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:03,505 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-05-02 17:52:03,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-05-02 17:52:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 17:52:03,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:03,506 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:03,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:03,721 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1474680479, now seen corresponding path program 10 times [2021-05-02 17:52:03,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:03,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830519178] [2021-05-02 17:52:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:03,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:03,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:03,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830519178] [2021-05-02 17:52:03,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830519178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:03,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752336476] [2021-05-02 17:52:03,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:03,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:03,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 17:52:03,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:03,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:04,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752336476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:04,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:04,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 17:52:04,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070773761] [2021-05-02 17:52:04,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 17:52:04,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:04,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 17:52:04,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:52:04,008 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:04,081 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2021-05-02 17:52:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 17:52:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-02 17:52:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:04,082 INFO L225 Difference]: With dead ends: 78 [2021-05-02 17:52:04,082 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 17:52:04,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:52:04,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 17:52:04,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-05-02 17:52:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 3 states have call successors, (3), 3 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 17:52:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-05-02 17:52:04,085 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2021-05-02 17:52:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:04,085 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-05-02 17:52:04,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-05-02 17:52:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 17:52:04,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:04,086 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:04,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 17:52:04,297 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2013358141, now seen corresponding path program 11 times [2021-05-02 17:52:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:04,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405082231] [2021-05-02 17:52:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:04,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:04,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:04,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405082231] [2021-05-02 17:52:04,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405082231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:04,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875948676] [2021-05-02 17:52:04,414 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 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 17:52:04,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-02 17:52:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:04,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:52:04,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:04,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:04,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875948676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:04,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:04,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 17:52:04,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92467808] [2021-05-02 17:52:04,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 17:52:04,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:04,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 17:52:04,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:52:04,631 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:04,720 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2021-05-02 17:52:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:52:04,721 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-02 17:52:04,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:04,721 INFO L225 Difference]: With dead ends: 84 [2021-05-02 17:52:04,721 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 17:52:04,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:52:04,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 17:52:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-05-02 17:52:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 3 states have call successors, (3), 3 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 17:52:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-05-02 17:52:04,724 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2021-05-02 17:52:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:04,724 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-05-02 17:52:04,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-05-02 17:52:04,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 17:52:04,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:04,725 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:04,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 17:52:04,941 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash -8451493, now seen corresponding path program 12 times [2021-05-02 17:52:04,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:04,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145960256] [2021-05-02 17:52:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:05,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:05,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145960256] [2021-05-02 17:52:05,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145960256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176170378] [2021-05-02 17:52:05,062 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 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 17:52:05,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-05-02 17:52:05,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:52:05,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:05,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:05,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176170378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:05,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 17:52:05,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122594543] [2021-05-02 17:52:05,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 17:52:05,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:05,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 17:52:05,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:52:05,445 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:05,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:05,563 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2021-05-02 17:52:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 17:52:05,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-02 17:52:05,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:05,564 INFO L225 Difference]: With dead ends: 90 [2021-05-02 17:52:05,564 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 17:52:05,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:52:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 17:52:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2021-05-02 17:52:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 3 states have call successors, (3), 3 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 17:52:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-05-02 17:52:05,581 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2021-05-02 17:52:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:05,582 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-05-02 17:52:05,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-05-02 17:52:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 17:52:05,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:05,583 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:05,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 17:52:05,789 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:05,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1642291975, now seen corresponding path program 13 times [2021-05-02 17:52:05,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:05,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150320202] [2021-05-02 17:52:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:05,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:05,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150320202] [2021-05-02 17:52:05,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150320202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276397182] [2021-05-02 17:52:05,967 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 17:52:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 17:52:06,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:06,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276397182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:06,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 17:52:06,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85865958] [2021-05-02 17:52:06,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 17:52:06,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:06,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 17:52:06,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:52:06,140 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:06,231 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-05-02 17:52:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 17:52:06,231 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-02 17:52:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:06,232 INFO L225 Difference]: With dead ends: 96 [2021-05-02 17:52:06,232 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 17:52:06,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:52:06,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 17:52:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2021-05-02 17:52:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 states have call successors, (3), 3 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 17:52:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-05-02 17:52:06,238 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2021-05-02 17:52:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:06,239 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-05-02 17:52:06,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-05-02 17:52:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 17:52:06,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:06,242 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:06,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:06,457 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:06,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:06,457 INFO L82 PathProgramCache]: Analyzing trace with hash 195035159, now seen corresponding path program 14 times [2021-05-02 17:52:06,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:06,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999821697] [2021-05-02 17:52:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:06,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:06,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999821697] [2021-05-02 17:52:06,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999821697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572353478] [2021-05-02 17:52:06,604 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 17:52:06,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:06,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:06,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:52:06,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:06,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:06,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572353478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:06,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 17:52:06,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706429108] [2021-05-02 17:52:06,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 17:52:06,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:06,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 17:52:06,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:52:06,772 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:06,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:06,863 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2021-05-02 17:52:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 17:52:06,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-02 17:52:06,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:06,864 INFO L225 Difference]: With dead ends: 102 [2021-05-02 17:52:06,864 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 17:52:06,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:52:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 17:52:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-05-02 17:52:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 3 states have call successors, (3), 3 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 17:52:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-05-02 17:52:06,866 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2021-05-02 17:52:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:06,866 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-05-02 17:52:06,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-05-02 17:52:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 17:52:06,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:06,867 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:07,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 17:52:07,083 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash 634852277, now seen corresponding path program 15 times [2021-05-02 17:52:07,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:07,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870286305] [2021-05-02 17:52:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:07,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-05-02 17:52:07,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:07,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870286305] [2021-05-02 17:52:07,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870286305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:07,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130346981] [2021-05-02 17:52:07,247 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 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 17:52:07,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-02 17:52:07,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:07,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 17:52:07,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:07,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 17:52:07,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130346981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:07,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:07,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 23 [2021-05-02 17:52:07,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427673598] [2021-05-02 17:52:07,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:52:07,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:07,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:52:07,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:52:07,516 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:07,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:07,684 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2021-05-02 17:52:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 17:52:07,684 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-02 17:52:07,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:07,685 INFO L225 Difference]: With dead ends: 110 [2021-05-02 17:52:07,685 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 17:52:07,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:52:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 17:52:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-05-02 17:52:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 3 states have call successors, (3), 3 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 17:52:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-05-02 17:52:07,687 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 79 [2021-05-02 17:52:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:07,687 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-05-02 17:52:07,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 21 states have internal predecessors, (87), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:07,688 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-05-02 17:52:07,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 17:52:07,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:07,688 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:07,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:07,897 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:07,897 INFO L82 PathProgramCache]: Analyzing trace with hash -12407789, now seen corresponding path program 16 times [2021-05-02 17:52:07,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:07,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528154474] [2021-05-02 17:52:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:08,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:08,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:08,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528154474] [2021-05-02 17:52:08,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528154474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:08,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192690372] [2021-05-02 17:52:08,061 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 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 17:52:08,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:08,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:52:08,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:08,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:08,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192690372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:08,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:08,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 17:52:08,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183954893] [2021-05-02 17:52:08,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 17:52:08,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:08,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 17:52:08,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:52:08,251 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:08,371 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-05-02 17:52:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 17:52:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 17:52:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:08,372 INFO L225 Difference]: With dead ends: 108 [2021-05-02 17:52:08,372 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 17:52:08,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:52:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 17:52:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2021-05-02 17:52:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 3 states have call successors, (3), 3 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 17:52:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-05-02 17:52:08,375 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2021-05-02 17:52:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:08,375 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-05-02 17:52:08,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-05-02 17:52:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 17:52:08,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:08,375 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:08,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:08,589 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:08,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash -13232847, now seen corresponding path program 17 times [2021-05-02 17:52:08,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:08,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8426646] [2021-05-02 17:52:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:08,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:08,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:08,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8426646] [2021-05-02 17:52:08,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8426646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:08,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158780397] [2021-05-02 17:52:08,808 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 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 17:52:08,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-05-02 17:52:08,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:08,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:52:08,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:09,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:09,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158780397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:09,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:09,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 17:52:09,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115637471] [2021-05-02 17:52:09,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:52:09,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:52:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:52:09,110 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:09,207 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2021-05-02 17:52:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 17:52:09,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-02 17:52:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:09,208 INFO L225 Difference]: With dead ends: 114 [2021-05-02 17:52:09,208 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 17:52:09,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:52:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 17:52:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2021-05-02 17:52:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 3 states have call successors, (3), 3 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 17:52:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-05-02 17:52:09,211 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2021-05-02 17:52:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:09,211 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-05-02 17:52:09,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-05-02 17:52:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 17:52:09,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:09,212 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:09,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 17:52:09,425 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:09,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:09,425 INFO L82 PathProgramCache]: Analyzing trace with hash -806113585, now seen corresponding path program 18 times [2021-05-02 17:52:09,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:09,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982903135] [2021-05-02 17:52:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:09,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:09,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:09,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982903135] [2021-05-02 17:52:09,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982903135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:09,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392141714] [2021-05-02 17:52:09,632 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 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 17:52:10,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-05-02 17:52:10,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:10,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 17:52:10,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:10,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:10,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392141714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:10,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:10,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 17:52:10,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606955781] [2021-05-02 17:52:10,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 17:52:10,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:10,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 17:52:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:52:10,377 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:10,498 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2021-05-02 17:52:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 17:52:10,498 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-02 17:52:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:10,499 INFO L225 Difference]: With dead ends: 120 [2021-05-02 17:52:10,499 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 17:52:10,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:52:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 17:52:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2021-05-02 17:52:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 3 states have call successors, (3), 3 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 17:52:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-05-02 17:52:10,501 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2021-05-02 17:52:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:10,501 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-05-02 17:52:10,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-05-02 17:52:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 17:52:10,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:10,501 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:10,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:10,720 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:10,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1739675885, now seen corresponding path program 19 times [2021-05-02 17:52:10,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:10,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167790393] [2021-05-02 17:52:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:10,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:10,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:10,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167790393] [2021-05-02 17:52:10,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167790393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:10,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708428855] [2021-05-02 17:52:10,957 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 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 17:52:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:11,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:52:11,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:11,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:11,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708428855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:11,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:11,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 17:52:11,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735534601] [2021-05-02 17:52:11,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:52:11,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:11,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:52:11,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:52:11,156 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:11,282 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2021-05-02 17:52:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 17:52:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-05-02 17:52:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:11,283 INFO L225 Difference]: With dead ends: 126 [2021-05-02 17:52:11,283 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 17:52:11,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:52:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 17:52:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2021-05-02 17:52:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 3 states have call successors, (3), 3 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 17:52:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-05-02 17:52:11,286 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2021-05-02 17:52:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:11,286 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-05-02 17:52:11,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-05-02 17:52:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 17:52:11,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:11,286 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:11,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 17:52:11,493 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:11,494 INFO L82 PathProgramCache]: Analyzing trace with hash 111997835, now seen corresponding path program 20 times [2021-05-02 17:52:11,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:11,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682405465] [2021-05-02 17:52:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:11,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:11,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:11,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682405465] [2021-05-02 17:52:11,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682405465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:11,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282350052] [2021-05-02 17:52:11,753 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 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 17:52:11,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:11,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:11,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:52:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:11,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:11,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282350052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:11,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:11,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 17:52:11,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269055110] [2021-05-02 17:52:11,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 17:52:11,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 17:52:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:52:11,974 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:12,139 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2021-05-02 17:52:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 17:52:12,139 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-05-02 17:52:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:12,140 INFO L225 Difference]: With dead ends: 132 [2021-05-02 17:52:12,141 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 17:52:12,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:52:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 17:52:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 110. [2021-05-02 17:52:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 3 states have call successors, (3), 3 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 17:52:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2021-05-02 17:52:12,145 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2021-05-02 17:52:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:12,145 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2021-05-02 17:52:12,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2021-05-02 17:52:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 17:52:12,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:12,146 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:12,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 17:52:12,361 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:12,361 INFO L82 PathProgramCache]: Analyzing trace with hash -718512471, now seen corresponding path program 21 times [2021-05-02 17:52:12,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:12,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854794683] [2021-05-02 17:52:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:12,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-05-02 17:52:12,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:12,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854794683] [2021-05-02 17:52:12,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854794683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:12,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392189722] [2021-05-02 17:52:12,630 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 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 17:52:12,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-02 17:52:12,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 17:52:12,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:13,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 17:52:13,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392189722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:13,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:13,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 29 [2021-05-02 17:52:13,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94583946] [2021-05-02 17:52:13,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:52:13,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:13,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:52:13,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:52:13,174 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 27 states have internal predecessors, (117), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:13,369 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2021-05-02 17:52:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 17:52:13,370 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 27 states have internal predecessors, (117), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2021-05-02 17:52:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:13,370 INFO L225 Difference]: With dead ends: 140 [2021-05-02 17:52:13,371 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 17:52:13,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:52:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 17:52:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-05-02 17:52:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 3 states have call successors, (3), 3 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 17:52:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2021-05-02 17:52:13,373 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 109 [2021-05-02 17:52:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:13,373 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2021-05-02 17:52:13,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 27 states have internal predecessors, (117), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2021-05-02 17:52:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 17:52:13,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:13,374 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:13,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:13,581 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1305462393, now seen corresponding path program 22 times [2021-05-02 17:52:13,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:13,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678735807] [2021-05-02 17:52:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:13,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:13,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:13,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678735807] [2021-05-02 17:52:13,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678735807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:13,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638020700] [2021-05-02 17:52:13,878 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 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 17:52:13,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:13,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:13,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 17:52:13,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:13,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:14,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638020700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:14,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:14,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 17:52:14,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528688779] [2021-05-02 17:52:14,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 17:52:14,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:14,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 17:52:14,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:52:14,117 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:14,261 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2021-05-02 17:52:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 17:52:14,261 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-05-02 17:52:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:14,262 INFO L225 Difference]: With dead ends: 138 [2021-05-02 17:52:14,262 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 17:52:14,262 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:52:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 17:52:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-05-02 17:52:14,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 3 states have call successors, (3), 3 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 17:52:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2021-05-02 17:52:14,264 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2021-05-02 17:52:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:14,264 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2021-05-02 17:52:14,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2021-05-02 17:52:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 17:52:14,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:14,265 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:14,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 17:52:14,481 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1951226405, now seen corresponding path program 23 times [2021-05-02 17:52:14,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:14,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020160967] [2021-05-02 17:52:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:14,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:14,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:14,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020160967] [2021-05-02 17:52:14,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020160967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:14,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862552369] [2021-05-02 17:52:14,756 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 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 17:52:15,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-05-02 17:52:15,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 17:52:15,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:15,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:15,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862552369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:15,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:15,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 17:52:15,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928700800] [2021-05-02 17:52:15,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:52:15,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:15,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:52:15,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:52:15,242 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:15,391 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2021-05-02 17:52:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 17:52:15,392 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-05-02 17:52:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:15,392 INFO L225 Difference]: With dead ends: 144 [2021-05-02 17:52:15,392 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 17:52:15,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:52:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 17:52:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 134. [2021-05-02 17:52:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 3 states have call successors, (3), 3 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 17:52:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2021-05-02 17:52:15,399 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2021-05-02 17:52:15,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:15,399 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2021-05-02 17:52:15,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:15,400 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2021-05-02 17:52:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 17:52:15,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:15,400 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:15,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:15,619 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:15,619 INFO L82 PathProgramCache]: Analyzing trace with hash 598002499, now seen corresponding path program 24 times [2021-05-02 17:52:15,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:15,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519843933] [2021-05-02 17:52:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:15,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:15,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:15,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519843933] [2021-05-02 17:52:15,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519843933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:15,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877053116] [2021-05-02 17:52:15,986 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:16,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-05-02 17:52:16,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:16,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:52:16,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:16,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:16,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:17,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877053116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:17,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:17,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-02 17:52:17,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002877656] [2021-05-02 17:52:17,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 17:52:17,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 17:52:17,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:52:17,102 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:17,234 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2021-05-02 17:52:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 17:52:17,234 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2021-05-02 17:52:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:17,235 INFO L225 Difference]: With dead ends: 150 [2021-05-02 17:52:17,235 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 17:52:17,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:52:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 17:52:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-05-02 17:52:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 3 states have call successors, (3), 3 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 17:52:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-05-02 17:52:17,238 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 133 [2021-05-02 17:52:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:17,238 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-05-02 17:52:17,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-05-02 17:52:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 17:52:17,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:17,238 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:17,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 17:52:17,448 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:17,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:17,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1524919521, now seen corresponding path program 25 times [2021-05-02 17:52:17,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:17,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352347980] [2021-05-02 17:52:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:17,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:17,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:17,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352347980] [2021-05-02 17:52:17,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352347980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:17,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647982086] [2021-05-02 17:52:17,773 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:17,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:52:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:17,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:17,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:18,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647982086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:18,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:18,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 17:52:18,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448821741] [2021-05-02 17:52:18,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 17:52:18,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:18,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 17:52:18,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:52:18,031 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:18,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:18,194 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2021-05-02 17:52:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 17:52:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-05-02 17:52:18,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:18,195 INFO L225 Difference]: With dead ends: 156 [2021-05-02 17:52:18,195 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 17:52:18,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:52:18,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 17:52:18,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 138. [2021-05-02 17:52:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 3 states have call successors, (3), 3 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 17:52:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2021-05-02 17:52:18,197 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2021-05-02 17:52:18,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:18,197 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2021-05-02 17:52:18,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2021-05-02 17:52:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-05-02 17:52:18,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:18,198 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:18,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 17:52:18,409 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:18,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:18,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1061019905, now seen corresponding path program 26 times [2021-05-02 17:52:18,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:18,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798054306] [2021-05-02 17:52:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:18,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1534 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:18,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:18,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798054306] [2021-05-02 17:52:18,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798054306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:18,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011769025] [2021-05-02 17:52:18,779 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:18,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:18,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:18,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 17:52:18,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:18,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:18,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1534 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:19,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011769025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:19,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:19,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 17:52:19,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928477206] [2021-05-02 17:52:19,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:52:19,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:19,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:52:19,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:52:19,025 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:19,207 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2021-05-02 17:52:19,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 17:52:19,208 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-05-02 17:52:19,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:19,208 INFO L225 Difference]: With dead ends: 162 [2021-05-02 17:52:19,208 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 17:52:19,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:52:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 17:52:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 140. [2021-05-02 17:52:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 3 states have call successors, (3), 3 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 17:52:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2021-05-02 17:52:19,217 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2021-05-02 17:52:19,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:19,218 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2021-05-02 17:52:19,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2021-05-02 17:52:19,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-02 17:52:19,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:19,218 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:19,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:19,425 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash 637256093, now seen corresponding path program 27 times [2021-05-02 17:52:19,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:19,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554550128] [2021-05-02 17:52:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:19,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-05-02 17:52:19,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:19,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554550128] [2021-05-02 17:52:19,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554550128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:19,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525166341] [2021-05-02 17:52:19,806 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:21,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-05-02 17:52:21,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:21,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 17:52:21,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:21,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-05-02 17:52:21,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525166341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:21,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:21,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 35 [2021-05-02 17:52:21,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353208112] [2021-05-02 17:52:21,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:52:21,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:21,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:52:21,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:21,778 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 35 states, 35 states have (on average 4.2) internal successors, (147), 33 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:22,024 INFO L93 Difference]: Finished difference Result 170 states and 176 transitions. [2021-05-02 17:52:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 17:52:22,025 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.2) internal successors, (147), 33 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2021-05-02 17:52:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:22,025 INFO L225 Difference]: With dead ends: 170 [2021-05-02 17:52:22,025 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 17:52:22,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 17:52:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2021-05-02 17:52:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 3 states have call successors, (3), 3 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 17:52:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2021-05-02 17:52:22,028 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 139 [2021-05-02 17:52:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:22,028 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2021-05-02 17:52:22,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 4.2) internal successors, (147), 33 states have internal predecessors, (147), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2021-05-02 17:52:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 17:52:22,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:22,029 INFO L523 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:22,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:22,236 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1812184827, now seen corresponding path program 28 times [2021-05-02 17:52:22,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:22,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613008243] [2021-05-02 17:52:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:22,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:22,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:22,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613008243] [2021-05-02 17:52:22,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613008243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:22,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618116406] [2021-05-02 17:52:22,634 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:22,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:22,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:22,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:52:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:22,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:22,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618116406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:22,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:22,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 17:52:22,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111528549] [2021-05-02 17:52:22,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 17:52:22,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:22,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 17:52:22,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:52:22,905 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:23,108 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2021-05-02 17:52:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 17:52:23,108 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-05-02 17:52:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:23,109 INFO L225 Difference]: With dead ends: 168 [2021-05-02 17:52:23,109 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 17:52:23,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:52:23,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 17:52:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 162. [2021-05-02 17:52:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 3 states have call successors, (3), 3 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 17:52:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2021-05-02 17:52:23,113 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2021-05-02 17:52:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:23,113 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2021-05-02 17:52:23,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2021-05-02 17:52:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-02 17:52:23,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:23,114 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:23,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 17:52:23,330 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:23,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:23,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1578399513, now seen corresponding path program 29 times [2021-05-02 17:52:23,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:23,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131389837] [2021-05-02 17:52:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:23,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:23,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:23,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131389837] [2021-05-02 17:52:23,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131389837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:23,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027618540] [2021-05-02 17:52:23,749 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:24,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-05-02 17:52:24,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:24,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 17:52:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:24,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:24,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027618540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:24,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:24,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 17:52:24,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234668081] [2021-05-02 17:52:24,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:52:24,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:24,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:52:24,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:24,459 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:24,668 INFO L93 Difference]: Finished difference Result 174 states and 177 transitions. [2021-05-02 17:52:24,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 17:52:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-05-02 17:52:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:24,669 INFO L225 Difference]: With dead ends: 174 [2021-05-02 17:52:24,669 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 17:52:24,670 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 17:52:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2021-05-02 17:52:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 3 states have call successors, (3), 3 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 17:52:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2021-05-02 17:52:24,674 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2021-05-02 17:52:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:24,674 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2021-05-02 17:52:24,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2021-05-02 17:52:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 17:52:24,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:24,675 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:24,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:24,889 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:24,889 INFO L82 PathProgramCache]: Analyzing trace with hash 249012151, now seen corresponding path program 30 times [2021-05-02 17:52:24,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:24,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076494746] [2021-05-02 17:52:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:25,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:25,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:25,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076494746] [2021-05-02 17:52:25,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076494746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:25,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093496448] [2021-05-02 17:52:25,325 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:40,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-05-02 17:52:40,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:40,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 17:52:40,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:40,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2237 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:40,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093496448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:40,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:40,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 17:52:40,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091167984] [2021-05-02 17:52:40,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:52:40,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:52:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:52:40,655 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:40,818 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2021-05-02 17:52:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 17:52:40,818 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-05-02 17:52:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:40,819 INFO L225 Difference]: With dead ends: 180 [2021-05-02 17:52:40,819 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 17:52:40,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:52:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 17:52:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2021-05-02 17:52:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 3 states have call successors, (3), 3 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 17:52:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2021-05-02 17:52:40,822 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2021-05-02 17:52:40,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:40,822 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2021-05-02 17:52:40,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2021-05-02 17:52:40,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 17:52:40,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:40,823 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:41,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 17:52:41,037 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1686955819, now seen corresponding path program 31 times [2021-05-02 17:52:41,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:41,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857429303] [2021-05-02 17:52:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:41,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:41,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:41,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857429303] [2021-05-02 17:52:41,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857429303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:41,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576293455] [2021-05-02 17:52:41,530 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:41,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:52:41,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:41,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:41,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576293455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:41,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:41,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 17:52:41,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359064043] [2021-05-02 17:52:41,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 17:52:41,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:41,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 17:52:41,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:41,822 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:42,064 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2021-05-02 17:52:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 17:52:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-05-02 17:52:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:42,067 INFO L225 Difference]: With dead ends: 186 [2021-05-02 17:52:42,067 INFO L226 Difference]: Without dead ends: 186 [2021-05-02 17:52:42,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-02 17:52:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 168. [2021-05-02 17:52:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 3 states have call successors, (3), 3 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 17:52:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2021-05-02 17:52:42,070 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2021-05-02 17:52:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:42,070 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2021-05-02 17:52:42,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2021-05-02 17:52:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 17:52:42,071 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:42,071 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:42,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 17:52:42,289 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1863631475, now seen corresponding path program 32 times [2021-05-02 17:52:42,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:42,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120122281] [2021-05-02 17:52:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:42,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:42,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:42,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120122281] [2021-05-02 17:52:42,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120122281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:42,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053994180] [2021-05-02 17:52:42,748 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:42,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:42,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:42,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 17:52:42,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:42,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:42,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:43,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053994180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:43,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:43,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 17:52:43,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150715427] [2021-05-02 17:52:43,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 17:52:43,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:43,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 17:52:43,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:52:43,025 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:43,240 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2021-05-02 17:52:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 17:52:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2021-05-02 17:52:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:43,241 INFO L225 Difference]: With dead ends: 192 [2021-05-02 17:52:43,241 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 17:52:43,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:52:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 17:52:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 170. [2021-05-02 17:52:43,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 3 states have call successors, (3), 3 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 17:52:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2021-05-02 17:52:43,244 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 167 [2021-05-02 17:52:43,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:43,244 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2021-05-02 17:52:43,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2021-05-02 17:52:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-05-02 17:52:43,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:43,245 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:43,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 17:52:43,465 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:43,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:43,465 INFO L82 PathProgramCache]: Analyzing trace with hash -520979311, now seen corresponding path program 33 times [2021-05-02 17:52:43,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:43,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149225593] [2021-05-02 17:52:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:43,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-05-02 17:52:43,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:43,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149225593] [2021-05-02 17:52:43,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149225593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:43,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893643613] [2021-05-02 17:52:43,967 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:53,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-05-02 17:52:53,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:53,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 17:52:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:53,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-05-02 17:52:53,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893643613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:53,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:53,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 41 [2021-05-02 17:52:53,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120327016] [2021-05-02 17:52:53,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 17:52:53,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:53,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 17:52:53,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:52:53,552 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 39 states have internal predecessors, (177), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:53,853 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2021-05-02 17:52:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:52:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 39 states have internal predecessors, (177), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2021-05-02 17:52:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:53,854 INFO L225 Difference]: With dead ends: 200 [2021-05-02 17:52:53,854 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 17:52:53,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=719, Invalid=1087, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:52:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 17:52:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-05-02 17:52:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 3 states have call successors, (3), 3 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 17:52:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2021-05-02 17:52:53,856 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 169 [2021-05-02 17:52:53,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:53,857 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2021-05-02 17:52:53,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 39 states have internal predecessors, (177), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2021-05-02 17:52:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 17:52:53,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:53,857 INFO L523 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:54,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 17:52:54,067 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:54,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1005421457, now seen corresponding path program 34 times [2021-05-02 17:52:54,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:54,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401760207] [2021-05-02 17:52:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:54,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-05-02 17:52:54,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:54,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401760207] [2021-05-02 17:52:54,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401760207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:54,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672239193] [2021-05-02 17:52:54,599 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:54,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:54,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:54,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 17:52:54,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:54,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-05-02 17:52:54,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672239193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:54,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:54,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 17:52:54,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033179177] [2021-05-02 17:52:54,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 17:52:54,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 17:52:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:52:54,900 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:55,142 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2021-05-02 17:52:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 17:52:55,143 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2021-05-02 17:52:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:55,144 INFO L225 Difference]: With dead ends: 198 [2021-05-02 17:52:55,144 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 17:52:55,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 492.8ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:52:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 17:52:55,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2021-05-02 17:52:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 3 states have call successors, (3), 3 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 17:52:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2021-05-02 17:52:55,150 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2021-05-02 17:52:55,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:55,150 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2021-05-02 17:52:55,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:55,151 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2021-05-02 17:52:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 17:52:55,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:55,151 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:55,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 17:52:55,365 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:55,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:55,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2102963213, now seen corresponding path program 35 times [2021-05-02 17:52:55,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:55,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767387306] [2021-05-02 17:52:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:56,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-05-02 17:52:56,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:56,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767387306] [2021-05-02 17:52:56,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767387306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:56,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502845549] [2021-05-02 17:52:56,009 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:57,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-05-02 17:52:57,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:57,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 17:52:57,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:57,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-05-02 17:52:57,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502845549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:57,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:57,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 17:52:57,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12240544] [2021-05-02 17:52:57,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 17:52:57,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:57,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 17:52:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:52:57,658 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:57,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:57,865 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2021-05-02 17:52:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:52:57,865 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-05-02 17:52:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:57,866 INFO L225 Difference]: With dead ends: 204 [2021-05-02 17:52:57,866 INFO L226 Difference]: Without dead ends: 204 [2021-05-02 17:52:57,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:52:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-02 17:52:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2021-05-02 17:52:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 3 states have call successors, (3), 3 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 17:52:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2021-05-02 17:52:57,869 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2021-05-02 17:52:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:57,869 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2021-05-02 17:52:57,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:52:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2021-05-02 17:52:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-05-02 17:52:57,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:57,870 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:58,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 17:52:58,085 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:58,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:58,085 INFO L82 PathProgramCache]: Analyzing trace with hash -36606933, now seen corresponding path program 36 times [2021-05-02 17:52:58,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:58,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539204966] [2021-05-02 17:52:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:58,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-05-02 17:52:58,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:58,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539204966] [2021-05-02 17:52:58,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539204966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:58,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346725270] [2021-05-02 17:52:58,686 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:40,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-05-02 17:53:40,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 17:53:40,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:40,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3224 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2021-05-02 17:53:40,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346725270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:40,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:40,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 44 [2021-05-02 17:53:40,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945228028] [2021-05-02 17:53:40,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 17:53:40,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:40,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 17:53:40,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:53:40,661 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 44 states, 44 states have (on average 4.568181818181818) internal successors, (201), 42 states have internal predecessors, (201), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:40,956 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2021-05-02 17:53:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 17:53:40,956 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.568181818181818) internal successors, (201), 42 states have internal predecessors, (201), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2021-05-02 17:53:40,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:40,957 INFO L225 Difference]: With dead ends: 212 [2021-05-02 17:53:40,957 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 17:53:40,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 646.5ms TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:53:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 17:53:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2021-05-02 17:53:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 3 states have call successors, (3), 3 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 17:53:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-05-02 17:53:40,959 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 193 [2021-05-02 17:53:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:40,960 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-05-02 17:53:40,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 4.568181818181818) internal successors, (201), 42 states have internal predecessors, (201), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-05-02 17:53:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-02 17:53:40,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:40,960 INFO L523 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:41,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 17:53:41,177 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:41,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:41,177 INFO L82 PathProgramCache]: Analyzing trace with hash 381276079, now seen corresponding path program 37 times [2021-05-02 17:53:41,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:41,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272572708] [2021-05-02 17:53:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:41,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-05-02 17:53:41,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272572708] [2021-05-02 17:53:41,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272572708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573710153] [2021-05-02 17:53:41,793 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:41,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 17:53:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:41,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:41,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-05-02 17:53:42,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573710153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:42,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:42,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 17:53:42,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325376723] [2021-05-02 17:53:42,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 17:53:42,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:42,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 17:53:42,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:53:42,126 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:42,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:42,338 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2021-05-02 17:53:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 17:53:42,338 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2021-05-02 17:53:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:42,339 INFO L225 Difference]: With dead ends: 213 [2021-05-02 17:53:42,339 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 17:53:42,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:53:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 17:53:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 207. [2021-05-02 17:53:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 3 states have call successors, (3), 3 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 17:53:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2021-05-02 17:53:42,342 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2021-05-02 17:53:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:42,342 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2021-05-02 17:53:42,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2021-05-02 17:53:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-02 17:53:42,343 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:42,343 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:42,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:42,557 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:42,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:42,557 INFO L82 PathProgramCache]: Analyzing trace with hash -394874799, now seen corresponding path program 38 times [2021-05-02 17:53:42,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:42,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093722158] [2021-05-02 17:53:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:43,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3706 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-05-02 17:53:43,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093722158] [2021-05-02 17:53:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093722158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315325827] [2021-05-02 17:53:43,278 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:43,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:53:43,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 17:53:43,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:43,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3706 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-05-02 17:53:43,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315325827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:43,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:43,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 17:53:43,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268379712] [2021-05-02 17:53:43,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 17:53:43,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:43,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 17:53:43,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:53:43,614 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:43,824 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2021-05-02 17:53:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 17:53:43,824 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2021-05-02 17:53:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:43,825 INFO L225 Difference]: With dead ends: 219 [2021-05-02 17:53:43,825 INFO L226 Difference]: Without dead ends: 219 [2021-05-02 17:53:43,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 680.1ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:53:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-02 17:53:43,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 209. [2021-05-02 17:53:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 3 states have call successors, (3), 3 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 17:53:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2021-05-02 17:53:43,828 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2021-05-02 17:53:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:43,828 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2021-05-02 17:53:43,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:53:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2021-05-02 17:53:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-05-02 17:53:43,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:43,829 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:44,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:44,041 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:44,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1048440947, now seen corresponding path program 39 times [2021-05-02 17:53:44,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:44,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717601618] [2021-05-02 17:53:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:44,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2021-05-02 17:53:44,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:44,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717601618] [2021-05-02 17:53:44,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717601618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:44,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335726421] [2021-05-02 17:53:44,695 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:11,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-05-02 17:54:11,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 17:54:11,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:11,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-05-02 17:54:11,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335726421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:11,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:11,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 47 [2021-05-02 17:54:11,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109272349] [2021-05-02 17:54:11,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 17:54:11,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:11,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 17:54:11,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:54:11,670 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 47 states, 47 states have (on average 4.595744680851064) internal successors, (216), 45 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:11,928 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2021-05-02 17:54:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 17:54:11,929 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.595744680851064) internal successors, (216), 45 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2021-05-02 17:54:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:11,930 INFO L225 Difference]: With dead ends: 227 [2021-05-02 17:54:11,930 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 17:54:11,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 704.3ms TimeCoverageRelationStatistics Valid=962, Invalid=1390, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:54:11,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 17:54:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2021-05-02 17:54:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 3 states have call successors, (3), 3 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 17:54:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2021-05-02 17:54:11,932 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 208 [2021-05-02 17:54:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:11,932 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2021-05-02 17:54:11,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 4.595744680851064) internal successors, (216), 45 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2021-05-02 17:54:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-05-02 17:54:11,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:11,933 INFO L523 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:12,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:12,141 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:12,141 INFO L82 PathProgramCache]: Analyzing trace with hash 565293539, now seen corresponding path program 40 times [2021-05-02 17:54:12,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:12,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470548282] [2021-05-02 17:54:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:12,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:54:12,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:12,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470548282] [2021-05-02 17:54:12,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470548282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:12,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80705440] [2021-05-02 17:54:12,846 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:12,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:54:12,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:12,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 17:54:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:12,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:12,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:54:13,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80705440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:13,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:13,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 17:54:13,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048119003] [2021-05-02 17:54:13,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 17:54:13,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:13,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 17:54:13,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:54:13,201 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:13,488 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2021-05-02 17:54:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 17:54:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2021-05-02 17:54:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:13,489 INFO L225 Difference]: With dead ends: 228 [2021-05-02 17:54:13,489 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 17:54:13,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 658.3ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:54:13,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 17:54:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 222. [2021-05-02 17:54:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 3 states have call successors, (3), 3 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 17:54:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2021-05-02 17:54:13,492 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2021-05-02 17:54:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:13,492 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2021-05-02 17:54:13,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2021-05-02 17:54:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-05-02 17:54:13,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:13,493 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:13,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 17:54:13,703 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2132330239, now seen corresponding path program 41 times [2021-05-02 17:54:13,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:13,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736858265] [2021-05-02 17:54:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:14,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:54:14,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:14,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736858265] [2021-05-02 17:54:14,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736858265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:14,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767565101] [2021-05-02 17:54:14,421 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:15,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-05-02 17:54:15,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:15,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 17:54:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:15,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:15,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4306 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:54:16,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767565101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:16,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:16,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 17:54:16,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270379195] [2021-05-02 17:54:16,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 17:54:16,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:16,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 17:54:16,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:54:16,209 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:16,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:16,497 INFO L93 Difference]: Finished difference Result 234 states and 237 transitions. [2021-05-02 17:54:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 17:54:16,497 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2021-05-02 17:54:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:16,498 INFO L225 Difference]: With dead ends: 234 [2021-05-02 17:54:16,498 INFO L226 Difference]: Without dead ends: 234 [2021-05-02 17:54:16,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 666.8ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:54:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-02 17:54:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 224. [2021-05-02 17:54:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0091324200913243) internal successors, (221), 219 states have internal predecessors, (221), 3 states have call successors, (3), 3 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 17:54:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2021-05-02 17:54:16,500 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 221 [2021-05-02 17:54:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:16,500 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2021-05-02 17:54:16,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:54:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2021-05-02 17:54:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-05-02 17:54:16,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:16,501 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:16,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:16,708 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:16,708 INFO L82 PathProgramCache]: Analyzing trace with hash -388534113, now seen corresponding path program 42 times [2021-05-02 17:54:16,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:16,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634244941] [2021-05-02 17:54:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:17,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:54:17,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:17,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634244941] [2021-05-02 17:54:17,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634244941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:17,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306463491] [2021-05-02 17:54:17,523 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:57:00,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2021-05-02 17:57:00,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:57:00,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 17:57:00,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:57:00,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:00,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:57:01,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306463491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:01,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:57:01,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-02 17:57:01,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097569150] [2021-05-02 17:57:01,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 17:57:01,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:57:01,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 17:57:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 17:57:01,157 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:57:01,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:57:01,439 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2021-05-02 17:57:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 17:57:01,440 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2021-05-02 17:57:01,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:57:01,440 INFO L225 Difference]: With dead ends: 240 [2021-05-02 17:57:01,440 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 17:57:01,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 752.8ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 17:57:01,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 17:57:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 226. [2021-05-02 17:57:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 3 states have call successors, (3), 3 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 17:57:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2021-05-02 17:57:01,443 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 223 [2021-05-02 17:57:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:57:01,443 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2021-05-02 17:57:01,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:57:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2021-05-02 17:57:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-02 17:57:01,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:57:01,444 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:57:01,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:57:01,657 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:57:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:57:01,657 INFO L82 PathProgramCache]: Analyzing trace with hash 362297533, now seen corresponding path program 43 times [2021-05-02 17:57:01,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:57:01,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826035805] [2021-05-02 17:57:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:57:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:02,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:57:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:57:02,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:57:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826035805] [2021-05-02 17:57:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826035805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202066414] [2021-05-02 17:57:02,468 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:57:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 17:57:02,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:57:02,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:57:02,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202066414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:02,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:57:02,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 17:57:02,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557672742] [2021-05-02 17:57:02,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 17:57:02,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:57:02,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 17:57:02,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:57:02,820 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:57:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:57:03,098 INFO L93 Difference]: Finished difference Result 246 states and 251 transitions. [2021-05-02 17:57:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 17:57:03,099 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2021-05-02 17:57:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:57:03,099 INFO L225 Difference]: With dead ends: 246 [2021-05-02 17:57:03,099 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 17:57:03,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 757.0ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:57:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 17:57:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 228. [2021-05-02 17:57:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 3 states have call successors, (3), 3 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 17:57:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2021-05-02 17:57:03,102 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2021-05-02 17:57:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:57:03,102 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2021-05-02 17:57:03,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:57:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2021-05-02 17:57:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-02 17:57:03,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:57:03,103 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:57:03,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 17:57:03,309 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:57:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:57:03,309 INFO L82 PathProgramCache]: Analyzing trace with hash 357003611, now seen corresponding path program 44 times [2021-05-02 17:57:03,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:57:03,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440808036] [2021-05-02 17:57:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:57:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:04,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:57:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4567 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:57:04,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:57:04,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440808036] [2021-05-02 17:57:04,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440808036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:04,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445053395] [2021-05-02 17:57:04,205 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:57:04,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:57:04,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:57:04,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 17:57:04,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:57:04,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4567 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:57:04,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445053395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:04,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:57:04,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 17:57:04,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620783458] [2021-05-02 17:57:04,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 17:57:04,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:57:04,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 17:57:04,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:57:04,565 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:57:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:57:04,808 INFO L93 Difference]: Finished difference Result 252 states and 258 transitions. [2021-05-02 17:57:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 17:57:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2021-05-02 17:57:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:57:04,809 INFO L225 Difference]: With dead ends: 252 [2021-05-02 17:57:04,809 INFO L226 Difference]: Without dead ends: 252 [2021-05-02 17:57:04,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:57:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-02 17:57:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 230. [2021-05-02 17:57:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.008888888888889) internal successors, (227), 225 states have internal predecessors, (227), 3 states have call successors, (3), 3 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 17:57:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2021-05-02 17:57:04,812 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 227 [2021-05-02 17:57:04,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:57:04,812 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2021-05-02 17:57:04,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:57:04,813 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2021-05-02 17:57:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-05-02 17:57:04,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:57:04,813 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:57:05,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 17:57:05,021 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:57:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:57:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash -435488135, now seen corresponding path program 45 times [2021-05-02 17:57:05,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:57:05,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294253860] [2021-05-02 17:57:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:57:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:05,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:57:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4658 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-05-02 17:57:05,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:57:05,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294253860] [2021-05-02 17:57:05,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294253860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:05,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261077354] [2021-05-02 17:57:05,907 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:57:59,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-05-02 17:57:59,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:57:59,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 17:57:59,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:57:59,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:59,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4658 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-05-02 17:58:00,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261077354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:00,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:58:00,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 46] total 53 [2021-05-02 17:58:00,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74866744] [2021-05-02 17:58:00,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 17:58:00,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:58:00,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 17:58:00,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:58:00,108 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand has 53 states, 53 states have (on average 4.471698113207547) internal successors, (237), 51 states have internal predecessors, (237), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:58:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:58:00,420 INFO L93 Difference]: Finished difference Result 260 states and 266 transitions. [2021-05-02 17:58:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 17:58:00,421 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.471698113207547) internal successors, (237), 51 states have internal predecessors, (237), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2021-05-02 17:58:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:58:00,421 INFO L225 Difference]: With dead ends: 260 [2021-05-02 17:58:00,421 INFO L226 Difference]: Without dead ends: 252 [2021-05-02 17:58:00,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 937.6ms TimeCoverageRelationStatistics Valid=1241, Invalid=1729, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 17:58:00,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-02 17:58:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2021-05-02 17:58:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0081632653061225) internal successors, (247), 245 states have internal predecessors, (247), 3 states have call successors, (3), 3 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 17:58:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2021-05-02 17:58:00,424 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 229 [2021-05-02 17:58:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:58:00,424 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2021-05-02 17:58:00,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 4.471698113207547) internal successors, (237), 51 states have internal predecessors, (237), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:58:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2021-05-02 17:58:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-05-02 17:58:00,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:58:00,425 INFO L523 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:58:00,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 17:58:00,629 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:58:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:58:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash -264855721, now seen corresponding path program 46 times [2021-05-02 17:58:00,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:58:00,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483282482] [2021-05-02 17:58:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:58:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:01,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:58:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5546 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-05-02 17:58:01,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:58:01,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483282482] [2021-05-02 17:58:01,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483282482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:01,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370566176] [2021-05-02 17:58:01,519 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:01,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:58:01,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:58:01,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 17:58:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:58:01,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5546 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-05-02 17:58:01,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370566176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:01,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:58:01,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 17:58:01,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905619549] [2021-05-02 17:58:01,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 17:58:01,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:58:01,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 17:58:01,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:58:01,954 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:58:02,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:58:02,298 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2021-05-02 17:58:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 17:58:02,298 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2021-05-02 17:58:02,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:58:02,299 INFO L225 Difference]: With dead ends: 258 [2021-05-02 17:58:02,299 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 17:58:02,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 837.9ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:58:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 17:58:02,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2021-05-02 17:58:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.008097165991903) internal successors, (249), 247 states have internal predecessors, (249), 3 states have call successors, (3), 3 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 17:58:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2021-05-02 17:58:02,301 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 249 [2021-05-02 17:58:02,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:58:02,302 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2021-05-02 17:58:02,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:58:02,302 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2021-05-02 17:58:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-05-02 17:58:02,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:58:02,303 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:58:02,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:02,515 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:58:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:58:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1181917707, now seen corresponding path program 47 times [2021-05-02 17:58:02,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:58:02,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109382924] [2021-05-02 17:58:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:58:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:03,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:58:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5641 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-05-02 17:58:03,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:58:03,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109382924] [2021-05-02 17:58:03,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109382924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:03,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487175157] [2021-05-02 17:58:03,497 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:18,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-05-02 17:58:18,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:58:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 17:58:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:58:18,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:18,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5641 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-05-02 17:58:19,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487175157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:19,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:58:19,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 17:58:19,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237652485] [2021-05-02 17:58:19,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 17:58:19,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:58:19,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 17:58:19,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:58:19,175 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:58:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:58:19,447 INFO L93 Difference]: Finished difference Result 264 states and 267 transitions. [2021-05-02 17:58:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 17:58:19,447 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2021-05-02 17:58:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:58:19,448 INFO L225 Difference]: With dead ends: 264 [2021-05-02 17:58:19,448 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 17:58:19,448 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 918.6ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:58:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 17:58:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 254. [2021-05-02 17:58:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.0080321285140563) internal successors, (251), 249 states have internal predecessors, (251), 3 states have call successors, (3), 3 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 17:58:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2021-05-02 17:58:19,458 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 251 [2021-05-02 17:58:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:58:19,458 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2021-05-02 17:58:19,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:58:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2021-05-02 17:58:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-05-02 17:58:19,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:58:19,459 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:58:19,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:58:19,665 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:58:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:58:19,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2010190573, now seen corresponding path program 48 times [2021-05-02 17:58:19,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:58:19,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360474935] [2021-05-02 17:58:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:58:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:20,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:58:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-05-02 17:58:20,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:58:20,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360474935] [2021-05-02 17:58:20,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360474935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:20,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139834956] [2021-05-02 17:58:20,618 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:04:40,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2021-05-02 18:04:40,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:04:41,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 18:04:41,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:04:41,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2021-05-02 18:04:41,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139834956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:04:41,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:04:41,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 56 [2021-05-02 18:04:41,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173937079] [2021-05-02 18:04:41,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 18:04:41,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:04:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 18:04:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:04:41,540 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand has 56 states, 56 states have (on average 4.660714285714286) internal successors, (261), 54 states have internal predecessors, (261), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:04:41,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:04:41,924 INFO L93 Difference]: Finished difference Result 272 states and 275 transitions. [2021-05-02 18:04:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 18:04:41,924 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.660714285714286) internal successors, (261), 54 states have internal predecessors, (261), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2021-05-02 18:04:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:04:41,925 INFO L225 Difference]: With dead ends: 272 [2021-05-02 18:04:41,925 INFO L226 Difference]: Without dead ends: 267 [2021-05-02 18:04:41,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1010.7ms TimeCoverageRelationStatistics Valid=1394, Invalid=1912, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 18:04:41,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-02 18:04:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-05-02 18:04:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 states have internal predecessors, (262), 3 states have call successors, (3), 3 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 18:04:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2021-05-02 18:04:41,928 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 253 [2021-05-02 18:04:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:04:41,928 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2021-05-02 18:04:41,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 4.660714285714286) internal successors, (261), 54 states have internal predecessors, (261), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:04:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2021-05-02 18:04:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-05-02 18:04:41,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:04:41,929 INFO L523 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:04:42,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:04:42,157 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:04:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:04:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1839899847, now seen corresponding path program 49 times [2021-05-02 18:04:42,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:04:42,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286553373] [2021-05-02 18:04:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:04:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:04:43,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:04:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:04:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6275 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-05-02 18:04:43,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:04:43,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286553373] [2021-05-02 18:04:43,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286553373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:04:43,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7207252] [2021-05-02 18:04:43,186 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:04:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:04:43,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 18:04:43,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:04:43,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6275 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-05-02 18:04:43,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7207252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:04:43,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:04:43,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 18:04:43,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569187313] [2021-05-02 18:04:43,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 18:04:43,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:04:43,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 18:04:43,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 18:04:43,590 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:04:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:04:43,878 INFO L93 Difference]: Finished difference Result 273 states and 275 transitions. [2021-05-02 18:04:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 18:04:43,878 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2021-05-02 18:04:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:04:43,879 INFO L225 Difference]: With dead ends: 273 [2021-05-02 18:04:43,879 INFO L226 Difference]: Without dead ends: 273 [2021-05-02 18:04:43,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 973.3ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 18:04:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-05-02 18:04:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 267. [2021-05-02 18:04:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0076335877862594) internal successors, (264), 262 states have internal predecessors, (264), 3 states have call successors, (3), 3 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 18:04:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2021-05-02 18:04:43,882 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 264 [2021-05-02 18:04:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:04:43,882 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2021-05-02 18:04:43,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:04:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2021-05-02 18:04:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 18:04:43,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:04:43,884 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:04:44,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:04:44,084 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:04:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:04:44,084 INFO L82 PathProgramCache]: Analyzing trace with hash -2008607127, now seen corresponding path program 50 times [2021-05-02 18:04:44,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:04:44,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166414047] [2021-05-02 18:04:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:04:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:04:45,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:04:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:04:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6376 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-05-02 18:04:45,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:04:45,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166414047] [2021-05-02 18:04:45,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166414047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:04:45,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895274091] [2021-05-02 18:04:45,158 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:04:45,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:04:45,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:04:45,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 18:04:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:04:45,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:04:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6376 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-05-02 18:04:45,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895274091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:04:45,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:04:45,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 18:04:45,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655960589] [2021-05-02 18:04:45,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 18:04:45,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:04:45,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 18:04:45,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:04:45,608 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:04:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:04:46,091 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2021-05-02 18:04:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 18:04:46,092 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2021-05-02 18:04:46,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:04:46,093 INFO L225 Difference]: With dead ends: 279 [2021-05-02 18:04:46,093 INFO L226 Difference]: Without dead ends: 279 [2021-05-02 18:04:46,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1020.8ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:04:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-02 18:04:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 269. [2021-05-02 18:04:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 3 states have call successors, (3), 3 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 18:04:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2021-05-02 18:04:46,096 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 266 [2021-05-02 18:04:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:04:46,097 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2021-05-02 18:04:46,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:04:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2021-05-02 18:04:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-02 18:04:46,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:04:46,098 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:04:46,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-02 18:04:46,313 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:04:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:04:46,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1838000011, now seen corresponding path program 51 times [2021-05-02 18:04:46,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:04:46,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191164526] [2021-05-02 18:04:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:04:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:04:47,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:04:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:04:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6479 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2021-05-02 18:04:47,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:04:47,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191164526] [2021-05-02 18:04:47,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191164526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:04:47,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666751094] [2021-05-02 18:04:47,512 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true