/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_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:51:33,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:51:33,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:51:33,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:51:33,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:51:33,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:51:33,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:51:33,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:51:33,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:51:33,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:51:33,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:51:33,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:51:33,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:51:33,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:51:33,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:51:33,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:51:33,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:51:33,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:51:33,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:51:33,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:51:33,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:51:33,346 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:51:33,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:51:33,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:51:33,351 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:51:33,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:51:33,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:51:33,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:51:33,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:51:33,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:51:33,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:51:33,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:51:33,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:51:33,353 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:51:33,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:51:33,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:51:33,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:51:33,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:51:33,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:51:33,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:51:33,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:51:33,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:51:33,356 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:51:33,356 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:51:33,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:51:33,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:51:33,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:51:33,760 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:51:33,761 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:51:33,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2021-05-02 17:51:33,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b0aacea/dea921f8f9224035ae2121afe0d2bd57/FLAGd635360ab [2021-05-02 17:51:34,346 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:51:34,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2021-05-02 17:51:34,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b0aacea/dea921f8f9224035ae2121afe0d2bd57/FLAGd635360ab [2021-05-02 17:51:34,712 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95b0aacea/dea921f8f9224035ae2121afe0d2bd57 [2021-05-02 17:51:34,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:51:34,718 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:51:34,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:34,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:51:34,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:51:34,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:34" (1/1) ... [2021-05-02 17:51:34,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6091e1ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34, skipping insertion in model container [2021-05-02 17:51:34,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:34" (1/1) ... [2021-05-02 17:51:34,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:51:34,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:51:34,864 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_1-1.c[321,334] [2021-05-02 17:51:34,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:34,879 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:51:34,889 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_1-1.c[321,334] [2021-05-02 17:51:34,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:34,904 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:51:34,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34 WrapperNode [2021-05-02 17:51:34,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:34,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:51:34,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:51:34,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:51:34,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34" (1/1) ... [2021-05-02 17:51:34,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34" (1/1) ... [2021-05-02 17:51:34,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34" (1/1) ... [2021-05-02 17:51:34,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34" (1/1) ... [2021-05-02 17:51:34,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34" (1/1) ... [2021-05-02 17:51:34,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34" (1/1) ... [2021-05-02 17:51:34,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34" (1/1) ... [2021-05-02 17:51:34,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:51:34,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:51:34,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:51:34,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:51:34,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:51:35,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:51:35,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:51:35,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:51:35,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:51:35,076 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:51:35,077 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:51:35,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:51:35,077 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:51:35,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:51:35,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:51:35,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:51:35,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:51:35,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:51:35,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:51:35,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:51:35,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:51:35,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:51:35,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:51:35,379 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:51:35,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:35 BoogieIcfgContainer [2021-05-02 17:51:35,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:51:35,381 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:51:35,381 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:51:35,382 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:51:35,385 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:35" (1/1) ... [2021-05-02 17:51:35,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:35 BasicIcfg [2021-05-02 17:51:35,402 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:51:35,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:51:35,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:51:35,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:51:35,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:51:34" (1/4) ... [2021-05-02 17:51:35,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb3d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:35, skipping insertion in model container [2021-05-02 17:51:35,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:34" (2/4) ... [2021-05-02 17:51:35,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb3d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:35, skipping insertion in model container [2021-05-02 17:51:35,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:35" (3/4) ... [2021-05-02 17:51:35,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb3d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:51:35, skipping insertion in model container [2021-05-02 17:51:35,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:35" (4/4) ... [2021-05-02 17:51:35,409 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-1.cJordan [2021-05-02 17:51:35,415 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:51:35,420 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:51:35,437 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:51:35,456 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:51:35,457 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:51:35,457 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:51:35,457 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:51:35,457 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:51:35,457 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:51:35,457 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:51:35,457 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:51:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 17:51:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:51:35,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:35,480 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:35,480 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:35,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:35,487 INFO L82 PathProgramCache]: Analyzing trace with hash -737742564, now seen corresponding path program 1 times [2021-05-02 17:51:35,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:35,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870189966] [2021-05-02 17:51:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:35,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:35,723 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 17:51:35,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:35,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870189966] [2021-05-02 17:51:35,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870189966] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:35,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:35,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:51:35,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462348488] [2021-05-02 17:51:35,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:51:35,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:51:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:35,744 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 17:51:35,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:35,797 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 17:51:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:51:35,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-02 17:51:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:35,806 INFO L225 Difference]: With dead ends: 21 [2021-05-02 17:51:35,807 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 17:51:35,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 17:51:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 17:51:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 17:51:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 17:51:35,838 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 17:51:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:35,838 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 17:51:35,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 17:51:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 17:51:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:51:35,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:35,840 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:35,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:51:35,840 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:35,841 INFO L82 PathProgramCache]: Analyzing trace with hash -709113413, now seen corresponding path program 1 times [2021-05-02 17:51:35,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:35,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922912721] [2021-05-02 17:51:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:35,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:35,951 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 17:51:35,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:35,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922912721] [2021-05-02 17:51:35,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922912721] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:35,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:35,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:51:35,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453118497] [2021-05-02 17:51:35,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:51:35,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:51:35,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:35,962 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 17:51:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:36,045 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-05-02 17:51:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:51:36,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-02 17:51:36,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:36,047 INFO L225 Difference]: With dead ends: 16 [2021-05-02 17:51:36,047 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 17:51:36,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 17:51:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 17:51:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 17:51:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 17:51:36,054 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 17:51:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:36,055 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 17:51:36,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 17:51:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 17:51:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 17:51:36,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:36,056 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:36,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:51:36,056 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash -341174979, now seen corresponding path program 1 times [2021-05-02 17:51:36,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:36,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503668160] [2021-05-02 17:51:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:36,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:36,214 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 17:51:36,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:36,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503668160] [2021-05-02 17:51:36,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503668160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:36,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162927319] [2021-05-02 17:51:36,215 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 17:51:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:36,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 17:51:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:36,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:36,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:36,489 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 17:51:36,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162927319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:36,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:36,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 17:51:36,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293242137] [2021-05-02 17:51:36,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:51:36,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:36,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:51:36,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:36,492 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 17:51:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:36,529 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 17:51:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:51:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-05-02 17:51:36,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:36,530 INFO L225 Difference]: With dead ends: 18 [2021-05-02 17:51:36,530 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 17:51:36,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 17:51:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 17:51:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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 17:51:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 17:51:36,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 17:51:36,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:36,535 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 17:51:36,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 17:51:36,535 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 17:51:36,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 17:51:36,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:36,536 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:36,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:51:36,753 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:36,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:36,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1060341823, now seen corresponding path program 2 times [2021-05-02 17:51:36,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:36,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977445439] [2021-05-02 17:51:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:36,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:36,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:36,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977445439] [2021-05-02 17:51:36,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977445439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:36,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426381393] [2021-05-02 17:51:36,858 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 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 17:51:36,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:36,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:36,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 17:51:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:36,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:36,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:37,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:37,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:37,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426381393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:37,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:37,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 17:51:37,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321894073] [2021-05-02 17:51:37,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:51:37,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:37,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:51:37,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:51:37,031 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:51:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:37,105 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 17:51:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:51:37,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:51:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:37,106 INFO L225 Difference]: With dead ends: 20 [2021-05-02 17:51:37,106 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 17:51:37,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:51:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 17:51:37,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 17:51:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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 17:51:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 17:51:37,109 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 17:51:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:37,110 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 17:51:37,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17:51:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 17:51:37,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:51:37,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:37,111 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:37,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:37,322 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:37,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:37,322 INFO L82 PathProgramCache]: Analyzing trace with hash -701742399, now seen corresponding path program 3 times [2021-05-02 17:51:37,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:37,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846239226] [2021-05-02 17:51:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:37,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:37,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846239226] [2021-05-02 17:51:37,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846239226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676777752] [2021-05-02 17:51:37,456 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 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 17:51:37,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:51:37,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:37,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:51:37,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:37,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:37,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:37,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:37,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:37,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:37,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:37,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676777752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:37,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:37,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 17:51:37,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884393923] [2021-05-02 17:51:37,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:51:37,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:37,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:51:37,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:37,669 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 17:51:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:37,724 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 17:51:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:51:37,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 18 [2021-05-02 17:51:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:37,725 INFO L225 Difference]: With dead ends: 22 [2021-05-02 17:51:37,725 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 17:51:37,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:37,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 17:51:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 17:51:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 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 17:51:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 17:51:37,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-02 17:51:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:37,729 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 17:51:37,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 17:51:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 17:51:37,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 17:51:37,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:37,730 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:37,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:37,939 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1847565117, now seen corresponding path program 4 times [2021-05-02 17:51:37,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:37,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323735143] [2021-05-02 17:51:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:38,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:38,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323735143] [2021-05-02 17:51:38,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323735143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:38,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521177354] [2021-05-02 17:51:38,033 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 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 17:51:38,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:38,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:38,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 17:51:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:38,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:38,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521177354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:38,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:38,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 17:51:38,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136045360] [2021-05-02 17:51:38,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:51:38,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:38,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:51:38,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:51:38,149 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 17:51:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:38,184 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 17:51:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:51:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 20 [2021-05-02 17:51:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:38,186 INFO L225 Difference]: With dead ends: 24 [2021-05-02 17:51:38,186 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 17:51:38,186 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:51:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 17:51:38,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-02 17:51:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 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 17:51:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 17:51:38,188 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-02 17:51:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:38,188 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 17:51:38,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 17:51:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 17:51:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:51:38,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:38,189 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:38,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:38,410 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:38,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash 823397957, now seen corresponding path program 5 times [2021-05-02 17:51:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:38,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41338297] [2021-05-02 17:51:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:38,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:38,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41338297] [2021-05-02 17:51:38,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41338297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:38,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22776345] [2021-05-02 17:51:38,485 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 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 17:51:38,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 17:51:38,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:51:38,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:38,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:38,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22776345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:38,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:38,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 17:51:38,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935773559] [2021-05-02 17:51:38,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:51:38,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:38,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:51:38,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:51:38,616 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 17:51:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:38,659 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 17:51:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:51:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 22 [2021-05-02 17:51:38,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:38,661 INFO L225 Difference]: With dead ends: 26 [2021-05-02 17:51:38,661 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:51:38,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:51:38,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:51:38,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 17:51:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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 17:51:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 17:51:38,672 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-02 17:51:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:38,673 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 17:51:38,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 17:51:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 17:51:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 17:51:38,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:38,674 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:38,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:51:38,889 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash -771530937, now seen corresponding path program 6 times [2021-05-02 17:51:38,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:38,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895375048] [2021-05-02 17:51:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:38,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:38,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895375048] [2021-05-02 17:51:38,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895375048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:38,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42850668] [2021-05-02 17:51:38,975 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 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 17:51:39,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 17:51:39,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:51:39,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:39,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:39,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42850668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:39,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:39,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 17:51:39,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227560304] [2021-05-02 17:51:39,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:51:39,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:39,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:51:39,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:39,090 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 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 17:51:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:39,120 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 17:51:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:51:39,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 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 24 [2021-05-02 17:51:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:39,121 INFO L225 Difference]: With dead ends: 28 [2021-05-02 17:51:39,121 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 17:51:39,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 17:51:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 17:51:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 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 17:51:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 17:51:39,123 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-02 17:51:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:39,123 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 17:51:39,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 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 17:51:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 17:51:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 17:51:39,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:39,124 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:39,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:39,340 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash -194873399, now seen corresponding path program 7 times [2021-05-02 17:51:39,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:39,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493436008] [2021-05-02 17:51:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:39,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:39,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:39,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493436008] [2021-05-02 17:51:39,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493436008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:39,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751056685] [2021-05-02 17:51:39,421 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 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 17:51:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:39,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 17:51:39,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:39,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:39,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751056685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:39,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:39,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 17:51:39,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460511497] [2021-05-02 17:51:39,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:51:39,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:39,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:51:39,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:51:39,538 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 17:51:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:39,588 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 17:51:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:51:39,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 26 [2021-05-02 17:51:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:39,592 INFO L225 Difference]: With dead ends: 30 [2021-05-02 17:51:39,592 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 17:51:39,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:51:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 17:51:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 17:51:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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 17:51:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 17:51:39,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-02 17:51:39,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:39,597 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 17:51:39,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 17:51:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 17:51:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 17:51:39,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:39,598 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:39,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:39,816 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:39,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:39,816 INFO L82 PathProgramCache]: Analyzing trace with hash -77760565, now seen corresponding path program 8 times [2021-05-02 17:51:39,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:39,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684463267] [2021-05-02 17:51:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:39,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:39,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:39,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684463267] [2021-05-02 17:51:39,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684463267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:39,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603440364] [2021-05-02 17:51:39,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:39,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:39,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:39,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:51:39,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:39,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:39,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:40,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603440364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:40,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:40,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 17:51:40,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082413010] [2021-05-02 17:51:40,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:51:40,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:40,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:51:40,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:51:40,040 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 17:51:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:40,074 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 17:51:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:51:40,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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 28 [2021-05-02 17:51:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:40,075 INFO L225 Difference]: With dead ends: 32 [2021-05-02 17:51:40,075 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 17:51:40,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:51:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 17:51:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 17:51:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 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 17:51:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 17:51:40,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-02 17:51:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:40,077 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 17:51:40,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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 17:51:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 17:51:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 17:51:40,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:40,078 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:40,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:51:40,293 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:40,293 INFO L82 PathProgramCache]: Analyzing trace with hash 798523213, now seen corresponding path program 9 times [2021-05-02 17:51:40,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:40,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450053478] [2021-05-02 17:51:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:40,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:40,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:40,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450053478] [2021-05-02 17:51:40,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450053478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:40,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683007326] [2021-05-02 17:51:40,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:40,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 17:51:40,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:40,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 17:51:40,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:40,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:40,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683007326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:40,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:40,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 17:51:40,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631530375] [2021-05-02 17:51:40,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 17:51:40,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:40,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 17:51:40,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:51:40,551 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 17:51:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:40,587 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 17:51:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 17:51:40,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 30 [2021-05-02 17:51:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:40,587 INFO L225 Difference]: With dead ends: 34 [2021-05-02 17:51:40,588 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 17:51:40,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:51:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 17:51:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 17:51:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 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 17:51:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 17:51:40,590 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-02 17:51:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:40,590 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 17:51:40,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 17:51:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 17:51:40,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 17:51:40,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:40,591 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:40,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:40,799 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:40,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:40,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1093643855, now seen corresponding path program 10 times [2021-05-02 17:51:40,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:40,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380707503] [2021-05-02 17:51:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:40,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:40,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:40,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380707503] [2021-05-02 17:51:40,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380707503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:40,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143066702] [2021-05-02 17:51:40,926 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 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 17:51:40,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:40,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:40,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:51:40,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:40,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:40,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:41,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143066702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:41,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:41,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-02 17:51:41,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644746674] [2021-05-02 17:51:41,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 17:51:41,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:41,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 17:51:41,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:51:41,053 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 17:51:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:41,109 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 17:51:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 17:51:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 32 [2021-05-02 17:51:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:41,110 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:51:41,110 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 17:51:41,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:51:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 17:51:41,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 17:51:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 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 17:51:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 17:51:41,112 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-02 17:51:41,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:41,112 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 17:51:41,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 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 17:51:41,113 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 17:51:41,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 17:51:41,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:41,113 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:41,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:41,333 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:41,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1236739281, now seen corresponding path program 11 times [2021-05-02 17:51:41,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:41,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361351520] [2021-05-02 17:51:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:41,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:41,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:41,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361351520] [2021-05-02 17:51:41,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361351520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:41,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569158233] [2021-05-02 17:51:41,439 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 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 17:51:41,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 17:51:41,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:41,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 17:51:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:41,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:41,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569158233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:41,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:41,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 17:51:41,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459419539] [2021-05-02 17:51:41,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 17:51:41,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 17:51:41,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:51:41,592 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 17:51:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:41,642 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 17:51:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 17:51:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 34 [2021-05-02 17:51:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:41,643 INFO L225 Difference]: With dead ends: 38 [2021-05-02 17:51:41,643 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 17:51:41,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:51:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 17:51:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 17:51:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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 17:51:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 17:51:41,647 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-02 17:51:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:41,647 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 17:51:41,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 17:51:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 17:51:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:51:41,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:41,648 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:41,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 17:51:41,865 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:41,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:41,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1312490195, now seen corresponding path program 12 times [2021-05-02 17:51:41,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:41,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182763656] [2021-05-02 17:51:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:41,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:41,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:41,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182763656] [2021-05-02 17:51:41,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182763656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:41,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837044504] [2021-05-02 17:51:41,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:42,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 17:51:42,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:42,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:51:42,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:42,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:42,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837044504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:42,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:42,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 17:51:42,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031272291] [2021-05-02 17:51:42,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 17:51:42,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:42,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 17:51:42,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:51:42,199 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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 17:51:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:42,259 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 17:51:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:51:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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 36 [2021-05-02 17:51:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:42,260 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:51:42,260 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 17:51:42,260 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:51:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 17:51:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 17:51:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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 17:51:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 17:51:42,262 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 17:51:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:42,262 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 17:51:42,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 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 17:51:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 17:51:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 17:51:42,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:42,262 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:42,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 17:51:42,479 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:42,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1094674517, now seen corresponding path program 13 times [2021-05-02 17:51:42,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:42,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271206198] [2021-05-02 17:51:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:42,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:42,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:42,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271206198] [2021-05-02 17:51:42,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271206198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:42,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166027576] [2021-05-02 17:51:42,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:42,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:51:42,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:42,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:42,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166027576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:42,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:42,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 17:51:42,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431232863] [2021-05-02 17:51:42,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 17:51:42,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:42,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 17:51:42,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:51:42,752 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 17:51:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:42,811 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 17:51:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 17:51:42,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 38 [2021-05-02 17:51:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:42,812 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:51:42,812 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 17:51:42,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:51:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 17:51:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 17:51:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 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 17:51:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 17:51:42,827 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-02 17:51:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:42,827 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 17:51:42,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 17:51:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 17:51:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:51:42,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:42,829 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:43,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 17:51:43,030 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2067761833, now seen corresponding path program 14 times [2021-05-02 17:51:43,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:43,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616597965] [2021-05-02 17:51:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:43,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:43,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:43,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616597965] [2021-05-02 17:51:43,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616597965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:43,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658898419] [2021-05-02 17:51:43,233 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 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 17:51:43,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:43,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:43,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 17:51:43,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:43,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:43,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658898419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:43,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:43,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 17:51:43,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635673081] [2021-05-02 17:51:43,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 17:51:43,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:43,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 17:51:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:51:43,364 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 17:51:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:43,425 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 17:51:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 17:51:43,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 40 [2021-05-02 17:51:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:43,426 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:51:43,426 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 17:51:43,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:51:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 17:51:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 17:51:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 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 17:51:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 17:51:43,428 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-02 17:51:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:43,429 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 17:51:43,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 17:51:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 17:51:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 17:51:43,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:43,431 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:43,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:43,641 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:43,641 INFO L82 PathProgramCache]: Analyzing trace with hash -332248615, now seen corresponding path program 15 times [2021-05-02 17:51:43,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:43,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010616857] [2021-05-02 17:51:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:43,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:43,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:43,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010616857] [2021-05-02 17:51:43,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010616857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:43,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500896005] [2021-05-02 17:51:43,791 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 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 17:51:43,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 17:51:43,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:43,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:51:43,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:43,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:44,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500896005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:44,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:44,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 17:51:44,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652154986] [2021-05-02 17:51:44,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 17:51:44,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:44,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 17:51:44,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:51:44,067 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 17:51:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:44,145 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 17:51:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 17:51:44,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 42 [2021-05-02 17:51:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:44,146 INFO L225 Difference]: With dead ends: 46 [2021-05-02 17:51:44,146 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 17:51:44,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:51:44,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 17:51:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 17:51:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 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 17:51:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 17:51:44,148 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-02 17:51:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:44,148 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 17:51:44,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 17:51:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 17:51:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:51:44,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:44,149 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:44,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 17:51:44,350 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:44,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1048643035, now seen corresponding path program 16 times [2021-05-02 17:51:44,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:44,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581392638] [2021-05-02 17:51:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:44,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:44,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:44,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581392638] [2021-05-02 17:51:44,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581392638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:44,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717949246] [2021-05-02 17:51:44,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:44,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:44,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:44,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 17:51:44,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:44,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:44,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717949246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:44,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:44,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2021-05-02 17:51:44,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266275089] [2021-05-02 17:51:44,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 17:51:44,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:44,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 17:51:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:51:44,678 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 17:51:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:44,750 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 17:51:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 17:51:44,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 44 [2021-05-02 17:51:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:44,751 INFO L225 Difference]: With dead ends: 48 [2021-05-02 17:51:44,751 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:51:44,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:51:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:51:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-02 17:51:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 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 17:51:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 17:51:44,753 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-02 17:51:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:44,753 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 17:51:44,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 17:51:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 17:51:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 17:51:44,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:44,754 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:44,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 17:51:44,965 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash 940624221, now seen corresponding path program 17 times [2021-05-02 17:51:44,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:44,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482693175] [2021-05-02 17:51:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:45,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:45,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482693175] [2021-05-02 17:51:45,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482693175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:45,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920913440] [2021-05-02 17:51:45,159 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 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 17:51:45,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 17:51:45,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:45,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:51:45,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:45,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:45,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920913440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:45,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:45,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 17:51:45,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989953272] [2021-05-02 17:51:45,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 17:51:45,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:45,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 17:51:45,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:51:45,369 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 17:51:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:45,446 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 17:51:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 17:51:45,446 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 46 [2021-05-02 17:51:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:45,447 INFO L225 Difference]: With dead ends: 50 [2021-05-02 17:51:45,447 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 17:51:45,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:51:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 17:51:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 17:51:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 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 17:51:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 17:51:45,449 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-02 17:51:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:45,450 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 17:51:45,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 17:51:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 17:51:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 17:51:45,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:45,450 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:45,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:45,653 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash 213759071, now seen corresponding path program 18 times [2021-05-02 17:51:45,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:45,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051324383] [2021-05-02 17:51:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:45,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:45,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051324383] [2021-05-02 17:51:45,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051324383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:45,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091319148] [2021-05-02 17:51:45,856 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 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 17:51:46,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 17:51:46,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:46,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:51:46,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:46,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:46,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091319148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:46,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:46,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 17:51:46,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242796267] [2021-05-02 17:51:46,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:51:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:46,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:51:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:51:46,360 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 17:51:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:46,434 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 17:51:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 17:51:46,435 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 48 [2021-05-02 17:51:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:46,435 INFO L225 Difference]: With dead ends: 52 [2021-05-02 17:51:46,435 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 17:51:46,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:51:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 17:51:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 17:51:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 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 17:51:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 17:51:46,437 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-02 17:51:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:46,437 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 17:51:46,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 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 17:51:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 17:51:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 17:51:46,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:46,438 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:46,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:46,645 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1776019169, now seen corresponding path program 19 times [2021-05-02 17:51:46,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:46,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043365617] [2021-05-02 17:51:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:46,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:46,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043365617] [2021-05-02 17:51:46,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043365617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:46,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807858360] [2021-05-02 17:51:46,873 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 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 17:51:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 17:51:46,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:46,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:47,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807858360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:47,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:47,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 17:51:47,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373130905] [2021-05-02 17:51:47,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 17:51:47,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:47,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 17:51:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:51:47,012 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 17:51:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:47,076 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 17:51:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 17:51:47,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 50 [2021-05-02 17:51:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:47,078 INFO L225 Difference]: With dead ends: 54 [2021-05-02 17:51:47,078 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 17:51:47,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:51:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 17:51:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 17:51:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 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 17:51:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 17:51:47,082 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-02 17:51:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:47,083 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 17:51:47,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 17:51:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 17:51:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 17:51:47,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:47,085 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:47,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:47,297 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash -130580253, now seen corresponding path program 20 times [2021-05-02 17:51:47,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:47,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583161035] [2021-05-02 17:51:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:47,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:47,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:47,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583161035] [2021-05-02 17:51:47,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583161035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:47,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499682301] [2021-05-02 17:51:47,530 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 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 17:51:47,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:47,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:47,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:51:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:47,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:47,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499682301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:47,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:47,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 17:51:47,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026940573] [2021-05-02 17:51:47,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:51:47,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:47,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:51:47,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:51:47,700 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 17:51:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:47,759 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 17:51:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 17:51:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 52 [2021-05-02 17:51:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:47,760 INFO L225 Difference]: With dead ends: 56 [2021-05-02 17:51:47,760 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 17:51:47,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:51:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 17:51:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 17:51:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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 17:51:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 17:51:47,762 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-02 17:51:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:47,763 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 17:51:47,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 17:51:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 17:51:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 17:51:47,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:47,763 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:47,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 17:51:47,967 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:47,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:47,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1578410597, now seen corresponding path program 21 times [2021-05-02 17:51:47,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:47,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339099958] [2021-05-02 17:51:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:48,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:48,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339099958] [2021-05-02 17:51:48,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339099958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:48,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70725682] [2021-05-02 17:51:48,221 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 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 17:51:48,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 17:51:48,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:48,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:51:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:48,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:48,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70725682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:48,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:48,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 17:51:48,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277624704] [2021-05-02 17:51:48,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 17:51:48,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:48,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 17:51:48,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:51:48,641 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 17:51:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:48,704 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 17:51:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 17:51:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 54 [2021-05-02 17:51:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:48,705 INFO L225 Difference]: With dead ends: 58 [2021-05-02 17:51:48,705 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 17:51:48,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:51:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 17:51:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 17:51:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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 17:51:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 17:51:48,706 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-02 17:51:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:48,707 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 17:51:48,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 17:51:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 17:51:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 17:51:48,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:48,707 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:48,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 17:51:48,921 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:48,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1053856921, now seen corresponding path program 22 times [2021-05-02 17:51:48,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:48,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966762121] [2021-05-02 17:51:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:49,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:49,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966762121] [2021-05-02 17:51:49,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966762121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:49,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692811224] [2021-05-02 17:51:49,169 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 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 17:51:49,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:49,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:49,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 17:51:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:49,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:49,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692811224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:49,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:49,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2021-05-02 17:51:49,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859135478] [2021-05-02 17:51:49,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 17:51:49,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:49,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 17:51:49,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 17:51:49,324 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 17:51:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:49,412 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 17:51:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 17:51:49,413 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 56 [2021-05-02 17:51:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:49,413 INFO L225 Difference]: With dead ends: 60 [2021-05-02 17:51:49,413 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 17:51:49,414 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 17:51:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 17:51:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 17:51:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 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 17:51:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 17:51:49,415 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-02 17:51:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:49,415 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 17:51:49,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 17:51:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 17:51:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 17:51:49,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:49,415 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:49,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:49,616 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:49,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash -927204375, now seen corresponding path program 23 times [2021-05-02 17:51:49,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:49,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051729249] [2021-05-02 17:51:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:49,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051729249] [2021-05-02 17:51:49,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051729249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310531780] [2021-05-02 17:51:49,898 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 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 17:51:50,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 17:51:50,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:50,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 17:51:50,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:50,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:50,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310531780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:50,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:50,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 17:51:50,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421324640] [2021-05-02 17:51:50,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 17:51:50,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:50,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 17:51:50,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:51:50,234 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 17:51:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:50,326 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 17:51:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 17:51:50,326 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 58 [2021-05-02 17:51:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:50,327 INFO L225 Difference]: With dead ends: 62 [2021-05-02 17:51:50,327 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 17:51:50,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:51:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 17:51:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 17:51:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 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 17:51:50,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 17:51:50,328 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-02 17:51:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:50,328 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 17:51:50,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 17:51:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 17:51:50,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 17:51:50,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:50,329 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:50,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 17:51:50,529 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:50,530 INFO L82 PathProgramCache]: Analyzing trace with hash 526808043, now seen corresponding path program 24 times [2021-05-02 17:51:50,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:50,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880749754] [2021-05-02 17:51:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:50,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:50,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:50,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880749754] [2021-05-02 17:51:50,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880749754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:50,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138688643] [2021-05-02 17:51:50,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:52,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 17:51:52,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:52,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 17:51:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:52,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:53,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138688643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:53,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:53,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 17:51:53,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019132682] [2021-05-02 17:51:53,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:51:53,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:53,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:51:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:51:53,035 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 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 17:51:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:53,131 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 17:51:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 17:51:53,132 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 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 60 [2021-05-02 17:51:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:53,132 INFO L225 Difference]: With dead ends: 64 [2021-05-02 17:51:53,132 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 17:51:53,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:51:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 17:51:53,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 17:51:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 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 17:51:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 17:51:53,135 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-02 17:51:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:53,136 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 17:51:53,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 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 17:51:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 17:51:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 17:51:53,136 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:53,136 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:53,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:53,353 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1968370541, now seen corresponding path program 25 times [2021-05-02 17:51:53,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:53,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317427154] [2021-05-02 17:51:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:53,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:53,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:53,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317427154] [2021-05-02 17:51:53,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317427154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:53,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641977255] [2021-05-02 17:51:53,655 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 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 17:51:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:53,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:51:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:53,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:53,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641977255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:53,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:53,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-02 17:51:53,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309378725] [2021-05-02 17:51:53,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 17:51:53,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 17:51:53,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:51:53,823 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 17:51:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:53,919 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 17:51:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 17:51:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 62 [2021-05-02 17:51:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:53,920 INFO L225 Difference]: With dead ends: 66 [2021-05-02 17:51:53,920 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 17:51:53,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:51:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 17:51:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 17:51:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 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 17:51:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 17:51:53,925 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-02 17:51:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:53,925 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 17:51:53,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 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 17:51:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 17:51:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 17:51:53,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:53,926 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:54,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 17:51:54,141 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:54,141 INFO L82 PathProgramCache]: Analyzing trace with hash 35494511, now seen corresponding path program 26 times [2021-05-02 17:51:54,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:54,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417134792] [2021-05-02 17:51:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:54,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:54,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417134792] [2021-05-02 17:51:54,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417134792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:54,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387139960] [2021-05-02 17:51:54,465 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 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 17:51:54,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:54,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:54,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:51:54,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:54,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:54,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387139960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:54,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:54,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 17:51:54,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681982315] [2021-05-02 17:51:54,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 17:51:54,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 17:51:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:51:54,623 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 17:51:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:54,689 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 17:51:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 17:51:54,690 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 64 [2021-05-02 17:51:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:54,690 INFO L225 Difference]: With dead ends: 68 [2021-05-02 17:51:54,690 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 17:51:54,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:51:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 17:51:54,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-02 17:51:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 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 17:51:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-02 17:51:54,692 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-02 17:51:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:54,692 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-02 17:51:54,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 17:51:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-02 17:51:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 17:51:54,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:54,693 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:54,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 17:51:54,905 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2032498447, now seen corresponding path program 27 times [2021-05-02 17:51:54,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:54,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051082598] [2021-05-02 17:51:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:55,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:55,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051082598] [2021-05-02 17:51:55,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051082598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:55,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579320894] [2021-05-02 17:51:55,270 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 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 17:51:56,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 17:51:56,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:56,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 17:51:56,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:56,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:56,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579320894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:56,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:56,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 17:51:56,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845968066] [2021-05-02 17:51:56,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:51:56,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:56,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:51:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:51:56,233 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 17:51:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:56,344 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 17:51:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 17:51:56,345 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 66 [2021-05-02 17:51:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:56,345 INFO L225 Difference]: With dead ends: 70 [2021-05-02 17:51:56,345 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 17:51:56,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:51:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 17:51:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 17:51:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 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 17:51:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-02 17:51:56,347 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-02 17:51:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:56,347 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-02 17:51:56,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 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 17:51:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-02 17:51:56,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 17:51:56,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:56,348 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:56,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 17:51:56,553 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:56,553 INFO L82 PathProgramCache]: Analyzing trace with hash -803873037, now seen corresponding path program 28 times [2021-05-02 17:51:56,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:56,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042485249] [2021-05-02 17:51:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:56,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:56,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:56,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042485249] [2021-05-02 17:51:56,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042485249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:56,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288731977] [2021-05-02 17:51:56,926 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 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 17:51:56,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:56,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:56,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 17:51:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:56,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:56,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:57,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288731977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:57,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:57,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2021-05-02 17:51:57,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380505879] [2021-05-02 17:51:57,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 17:51:57,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 17:51:57,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:51:57,088 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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 17:51:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:57,207 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 17:51:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 17:51:57,207 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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 68 [2021-05-02 17:51:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:57,208 INFO L225 Difference]: With dead ends: 72 [2021-05-02 17:51:57,208 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 17:51:57,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:51:57,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 17:51:57,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 17:51:57,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 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 17:51:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-02 17:51:57,210 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-02 17:51:57,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:57,210 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-02 17:51:57,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 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 17:51:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-02 17:51:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 17:51:57,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:57,210 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:57,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:57,425 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1210860427, now seen corresponding path program 29 times [2021-05-02 17:51:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:57,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133392268] [2021-05-02 17:51:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:57,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:57,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:57,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133392268] [2021-05-02 17:51:57,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133392268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:57,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767458306] [2021-05-02 17:51:57,824 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 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 17:51:58,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 17:51:58,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:58,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:51:58,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:58,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:58,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767458306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:58,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 17:51:58,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585668653] [2021-05-02 17:51:58,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 17:51:58,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:58,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 17:51:58,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:51:58,374 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 17:51:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:58,494 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 17:51:58,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 17:51:58,495 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 70 [2021-05-02 17:51:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:58,495 INFO L225 Difference]: With dead ends: 74 [2021-05-02 17:51:58,495 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 17:51:58,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:51:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 17:51:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 17:51:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 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 17:51:58,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-02 17:51:58,498 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-02 17:51:58,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:58,498 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-02 17:51:58,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 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 17:51:58,498 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-02 17:51:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 17:51:58,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:58,499 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:58,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-02 17:51:58,709 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:58,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1483718281, now seen corresponding path program 30 times [2021-05-02 17:51:58,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:58,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149903370] [2021-05-02 17:51:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:51:59,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:59,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149903370] [2021-05-02 17:51:59,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149903370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290827525] [2021-05-02 17:51:59,119 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 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 17:52:03,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 17:52:03,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 17:52:03,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:03,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:03,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290827525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:03,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:03,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 17:52:03,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439870161] [2021-05-02 17:52:03,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:52:03,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:03,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:52:03,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:03,512 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 17:52:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:03,632 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 17:52:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 17:52:03,633 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 72 [2021-05-02 17:52:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:03,634 INFO L225 Difference]: With dead ends: 76 [2021-05-02 17:52:03,634 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 17:52:03,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 17:52:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 17:52:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 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 17:52:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-02 17:52:03,636 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-02 17:52:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:03,636 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-02 17:52:03,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 17:52:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-02 17:52:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 17:52:03,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:03,637 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:03,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:03,847 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:03,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1707110919, now seen corresponding path program 31 times [2021-05-02 17:52:03,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:03,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091354075] [2021-05-02 17:52:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:04,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:04,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:04,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091354075] [2021-05-02 17:52:04,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091354075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:04,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266383470] [2021-05-02 17:52:04,298 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 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 17:52:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:04,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 17:52:04,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:04,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:04,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266383470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:04,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:04,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 17:52:04,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690151212] [2021-05-02 17:52:04,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:52:04,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:52:04,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:52:04,481 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 17:52:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:04,595 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 17:52:04,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 17:52:04,595 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 74 [2021-05-02 17:52:04,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:04,595 INFO L225 Difference]: With dead ends: 78 [2021-05-02 17:52:04,595 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 17:52:04,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:52:04,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 17:52:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 17:52:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 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 17:52:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-02 17:52:04,597 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-02 17:52:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:04,597 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-02 17:52:04,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 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 17:52:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-02 17:52:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 17:52:04,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:04,598 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:04,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 17:52:04,805 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:04,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1639071237, now seen corresponding path program 32 times [2021-05-02 17:52:04,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:04,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740144860] [2021-05-02 17:52:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:05,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:05,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740144860] [2021-05-02 17:52:05,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740144860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273230896] [2021-05-02 17:52:05,287 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 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 17:52:05,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:05,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:05,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:52:05,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:05,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:05,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273230896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:05,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 17:52:05,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782478908] [2021-05-02 17:52:05,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 17:52:05,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 17:52:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:05,483 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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 17:52:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:05,589 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 17:52:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 17:52:05,589 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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 76 [2021-05-02 17:52:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:05,590 INFO L225 Difference]: With dead ends: 80 [2021-05-02 17:52:05,590 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 17:52:05,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:05,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 17:52:05,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-02 17:52:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 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 17:52:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-02 17:52:05,592 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-02 17:52:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:05,592 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-02 17:52:05,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 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 17:52:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-02 17:52:05,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 17:52:05,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:05,592 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:05,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 17:52:05,801 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:05,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:05,801 INFO L82 PathProgramCache]: Analyzing trace with hash -677446275, now seen corresponding path program 33 times [2021-05-02 17:52:05,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:05,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628907184] [2021-05-02 17:52:05,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:06,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:06,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628907184] [2021-05-02 17:52:06,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628907184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878884548] [2021-05-02 17:52:06,272 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 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 17:52:25,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 17:52:25,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:25,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 17:52:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:25,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:25,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878884548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:25,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:25,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 17:52:25,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309166129] [2021-05-02 17:52:25,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 17:52:25,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:25,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 17:52:25,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:52:25,835 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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 17:52:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:25,981 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 17:52:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 17:52:25,981 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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 78 [2021-05-02 17:52:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:25,982 INFO L225 Difference]: With dead ends: 82 [2021-05-02 17:52:25,982 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 17:52:25,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:52:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 17:52:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 17:52:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 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 17:52:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-02 17:52:25,983 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-02 17:52:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:25,984 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-02 17:52:25,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 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 17:52:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-02 17:52:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 17:52:25,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:25,984 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:26,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 17:52:26,185 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash 26173567, now seen corresponding path program 34 times [2021-05-02 17:52:26,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:26,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546111557] [2021-05-02 17:52:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:26,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:26,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:26,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546111557] [2021-05-02 17:52:26,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546111557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:26,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816613027] [2021-05-02 17:52:26,678 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 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 17:52:26,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:26,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:26,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 17:52:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:26,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:26,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816613027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:26,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:26,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2021-05-02 17:52:26,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760950494] [2021-05-02 17:52:26,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 17:52:26,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:26,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 17:52:26,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:52:26,884 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 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 17:52:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:27,021 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 17:52:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 17:52:27,021 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 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 80 [2021-05-02 17:52:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:27,022 INFO L225 Difference]: With dead ends: 84 [2021-05-02 17:52:27,022 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 17:52:27,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:52:27,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 17:52:27,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-02 17:52:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 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 17:52:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-02 17:52:27,024 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-02 17:52:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:27,024 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-02 17:52:27,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 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 17:52:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-02 17:52:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 17:52:27,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:27,024 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:27,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 17:52:27,225 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:27,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:27,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1894976257, now seen corresponding path program 35 times [2021-05-02 17:52:27,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:27,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136165804] [2021-05-02 17:52:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:27,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:27,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:27,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136165804] [2021-05-02 17:52:27,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136165804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:27,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269660003] [2021-05-02 17:52:27,750 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 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 17:52:28,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-02 17:52:28,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 17:52:28,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:28,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:28,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269660003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:28,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:28,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 17:52:28,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768349841] [2021-05-02 17:52:28,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 17:52:28,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 17:52:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:52:28,809 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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 17:52:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:28,955 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 17:52:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 17:52:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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 82 [2021-05-02 17:52:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:28,956 INFO L225 Difference]: With dead ends: 86 [2021-05-02 17:52:28,956 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 17:52:28,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 493.1ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:52:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 17:52:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 17:52:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 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 17:52:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-02 17:52:28,958 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-02 17:52:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:28,958 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-02 17:52:28,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 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 17:52:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-02 17:52:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 17:52:28,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:28,959 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:29,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 17:52:29,169 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1776935677, now seen corresponding path program 36 times [2021-05-02 17:52:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:29,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908499327] [2021-05-02 17:52:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:29,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:29,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:29,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908499327] [2021-05-02 17:52:29,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908499327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:29,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690367807] [2021-05-02 17:52:29,730 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 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 17:52:56,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-02 17:52:56,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:56,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 17:52:56,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:56,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:56,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690367807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:56,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:56,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 17:52:56,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720307025] [2021-05-02 17:52:56,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 17:52:56,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:56,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 17:52:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:52:56,529 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 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 17:52:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:56,664 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 17:52:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:52:56,664 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 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 84 [2021-05-02 17:52:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:56,665 INFO L225 Difference]: With dead ends: 88 [2021-05-02 17:52:56,665 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 17:52:56,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 529.4ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:52:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 17:52:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-02 17:52:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 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 17:52:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-02 17:52:56,667 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-02 17:52:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:56,667 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-02 17:52:56,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 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 17:52:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-02 17:52:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 17:52:56,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:56,667 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:56,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 17:52:56,877 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash -21186939, now seen corresponding path program 37 times [2021-05-02 17:52:56,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:56,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720105751] [2021-05-02 17:52:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:57,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:57,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:57,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720105751] [2021-05-02 17:52:57,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720105751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:57,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867067657] [2021-05-02 17:52:57,454 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 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 17:52:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:57,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 17:52:57,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:57,529 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 17:52:57,533 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 17:52:57,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,549 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 17:52:57,558 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 17:52:57,563 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 17:52:57,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:57,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867067657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:57,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:57,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2021-05-02 17:52:57,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111441195] [2021-05-02 17:52:57,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 17:52:57,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:57,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 17:52:57,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 17:52:57,661 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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 17:52:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:57,767 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 17:52:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 17:52:57,767 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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 86 [2021-05-02 17:52:57,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:57,768 INFO L225 Difference]: With dead ends: 90 [2021-05-02 17:52:57,768 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 17:52:57,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 543.6ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 17:52:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 17:52:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 17:52:57,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 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 17:52:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-02 17:52:57,769 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-02 17:52:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:57,770 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-02 17:52:57,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 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 17:52:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-02 17:52:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 17:52:57,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:57,770 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:57,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 17:52:57,971 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:57,971 INFO L82 PathProgramCache]: Analyzing trace with hash -668797049, now seen corresponding path program 38 times [2021-05-02 17:52:57,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:57,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106998692] [2021-05-02 17:52:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:58,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:58,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:58,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106998692] [2021-05-02 17:52:58,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106998692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:58,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318907449] [2021-05-02 17:52:58,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:52:58,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:58,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:58,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 17:52:58,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:58,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:58,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318907449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:58,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:58,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 17:52:58,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072839513] [2021-05-02 17:52:58,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 17:52:58,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 17:52:58,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:52:58,792 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 17:52:58,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:58,936 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 17:52:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 17:52:58,937 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 88 [2021-05-02 17:52:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:58,937 INFO L225 Difference]: With dead ends: 92 [2021-05-02 17:52:58,937 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 17:52:58,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 583.3ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:52:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 17:52:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 17:52:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 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 17:52:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-02 17:52:58,939 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-02 17:52:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:58,939 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-02 17:52:58,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 17:52:58,939 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-02 17:52:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 17:52:58,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:58,940 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:59,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 17:52:59,145 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:59,145 INFO L82 PathProgramCache]: Analyzing trace with hash -251854839, now seen corresponding path program 39 times [2021-05-02 17:52:59,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:59,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867692085] [2021-05-02 17:52:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:59,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:52:59,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:59,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867692085] [2021-05-02 17:52:59,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867692085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:59,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188102896] [2021-05-02 17:52:59,796 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 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 17:53:52,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 17:53:52,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:52,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 17:53:52,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:52,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:52,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188102896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:52,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:52,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 17:53:52,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748967131] [2021-05-02 17:53:52,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 17:53:52,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:52,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 17:53:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:53:52,903 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 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 17:53:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:53,054 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 17:53:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 17:53:53,054 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 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 90 [2021-05-02 17:53:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:53,055 INFO L225 Difference]: With dead ends: 94 [2021-05-02 17:53:53,055 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 17:53:53,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:53:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 17:53:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 17:53:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 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 17:53:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-02 17:53:53,059 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-02 17:53:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:53,059 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-02 17:53:53,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 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 17:53:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-02 17:53:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 17:53:53,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:53,060 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:53,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:53,281 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:53,281 INFO L82 PathProgramCache]: Analyzing trace with hash 997650443, now seen corresponding path program 40 times [2021-05-02 17:53:53,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:53,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645669975] [2021-05-02 17:53:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:53,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:53,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:53,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645669975] [2021-05-02 17:53:53,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645669975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:53,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994775353] [2021-05-02 17:53:53,961 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 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 17:53:54,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:53:54,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:54,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 17:53:54,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:54,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:54,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994775353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:54,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:54,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2021-05-02 17:53:54,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254434281] [2021-05-02 17:53:54,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 17:53:54,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:54,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 17:53:54,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 17:53:54,172 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 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 17:53:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:54,285 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 17:53:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 17:53:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 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 92 [2021-05-02 17:53:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:54,286 INFO L225 Difference]: With dead ends: 96 [2021-05-02 17:53:54,286 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 17:53:54,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 636.9ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 17:53:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 17:53:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-02 17:53:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 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 17:53:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-02 17:53:54,288 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-02 17:53:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:54,288 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-02 17:53:54,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 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 17:53:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-02 17:53:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 17:53:54,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:54,288 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:54,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:54,493 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash -818616435, now seen corresponding path program 41 times [2021-05-02 17:53:54,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:54,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855700765] [2021-05-02 17:53:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:55,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:53:55,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:55,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855700765] [2021-05-02 17:53:55,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855700765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:55,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214347093] [2021-05-02 17:53:55,173 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 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 17:54:03,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 17:54:03,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:03,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 17:54:03,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:03,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:03,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214347093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:03,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:03,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 17:54:03,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646409248] [2021-05-02 17:54:03,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 17:54:03,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 17:54:03,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:54:03,354 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 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 17:54:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:03,485 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 17:54:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 17:54:03,486 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 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 94 [2021-05-02 17:54:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:03,486 INFO L225 Difference]: With dead ends: 98 [2021-05-02 17:54:03,486 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 17:54:03,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 645.0ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:54:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 17:54:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-02 17:54:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 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 17:54:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-02 17:54:03,488 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-02 17:54:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:03,488 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-02 17:54:03,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 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 17:54:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-02 17:54:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 17:54:03,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:03,489 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:03,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 17:54:03,693 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:03,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:03,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1800603279, now seen corresponding path program 42 times [2021-05-02 17:54:03,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:03,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123575144] [2021-05-02 17:54:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:04,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:54:04,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:04,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123575144] [2021-05-02 17:54:04,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123575144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:04,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157187196] [2021-05-02 17:54:04,466 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 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 17:55:12,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 17:55:12,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:55:12,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 17:55:12,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:12,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:55:12,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157187196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:12,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:12,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 17:55:12,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011708649] [2021-05-02 17:55:12,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 17:55:12,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:12,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 17:55:12,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:55:12,473 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 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 17:55:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:12,607 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 17:55:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 17:55:12,608 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 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 96 [2021-05-02 17:55:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:12,608 INFO L225 Difference]: With dead ends: 100 [2021-05-02 17:55:12,608 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 17:55:12,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 713.8ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:55:12,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 17:55:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-02 17:55:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 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 17:55:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-02 17:55:12,610 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-02 17:55:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:12,610 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-02 17:55:12,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 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 17:55:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-02 17:55:12,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 17:55:12,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:12,611 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:12,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:55:12,825 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2019912977, now seen corresponding path program 43 times [2021-05-02 17:55:12,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:12,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688147969] [2021-05-02 17:55:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:13,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:55:13,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:13,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688147969] [2021-05-02 17:55:13,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688147969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:13,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481438847] [2021-05-02 17:55:13,593 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 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 17:55:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:13,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 17:55:13,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:13,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:55:13,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481438847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:13,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:13,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-02 17:55:13,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545327969] [2021-05-02 17:55:13,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 17:55:13,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:13,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 17:55:13,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 17:55:13,815 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 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 17:55:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:13,976 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 17:55:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 17:55:13,977 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 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 98 [2021-05-02 17:55:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:13,977 INFO L225 Difference]: With dead ends: 102 [2021-05-02 17:55:13,977 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 17:55:13,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 733.1ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 17:55:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 17:55:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 17:55:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 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 17:55:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-02 17:55:13,980 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-02 17:55:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:13,980 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-02 17:55:13,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 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 17:55:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-02 17:55:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 17:55:13,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:13,980 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:14,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:55:14,193 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:14,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1971832045, now seen corresponding path program 44 times [2021-05-02 17:55:14,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:14,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17228155] [2021-05-02 17:55:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:14,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:55:14,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:14,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17228155] [2021-05-02 17:55:14,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17228155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:14,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380509669] [2021-05-02 17:55:14,987 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 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 17:55:15,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:55:15,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:55:15,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 17:55:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:15,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:55:15,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380509669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:15,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:15,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 17:55:15,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636477232] [2021-05-02 17:55:15,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 17:55:15,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:15,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 17:55:15,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:55:15,214 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 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 17:55:15,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:15,340 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 17:55:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 17:55:15,341 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 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 100 [2021-05-02 17:55:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:15,341 INFO L225 Difference]: With dead ends: 104 [2021-05-02 17:55:15,341 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 17:55:15,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 747.7ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:55:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 17:55:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 17:55:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 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 17:55:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-02 17:55:15,343 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-02 17:55:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:15,343 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-02 17:55:15,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 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 17:55:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-02 17:55:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 17:55:15,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:15,344 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:15,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 17:55:15,549 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:15,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:15,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1661964437, now seen corresponding path program 45 times [2021-05-02 17:55:15,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:15,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260878199] [2021-05-02 17:55:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:16,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:55:16,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:16,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260878199] [2021-05-02 17:55:16,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260878199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:16,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676373090] [2021-05-02 17:55:16,386 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 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 17:57:20,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-02 17:57:20,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:57:20,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 17:57:20,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:57:20,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:57:20,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676373090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:20,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:57:20,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 17:57:20,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405137934] [2021-05-02 17:57:20,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 17:57:20,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:57:20,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 17:57:20,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:57:20,749 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 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 17:57:20,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:57:20,852 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 17:57:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 17:57:20,852 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 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 102 [2021-05-02 17:57:20,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:57:20,853 INFO L225 Difference]: With dead ends: 106 [2021-05-02 17:57:20,853 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 17:57:20,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 775.6ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:57:20,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 17:57:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 17:57:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 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 17:57:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-02 17:57:20,855 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-02 17:57:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:57:20,855 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-02 17:57:20,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 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 17:57:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-02 17:57:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 17:57:20,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:57:20,856 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:57:21,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 17:57:21,069 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:57:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:57:21,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1931971991, now seen corresponding path program 46 times [2021-05-02 17:57:21,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:57:21,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374060235] [2021-05-02 17:57:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:57:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:21,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:57:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:57:21,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:57:21,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374060235] [2021-05-02 17:57:21,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374060235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:21,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763875251] [2021-05-02 17:57:21,927 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 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 17:57:21,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:57:21,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:57:21,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 17:57:21,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:57:21,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:21,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:21,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:21,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:57:22,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763875251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:22,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:57:22,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2021-05-02 17:57:22,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321962797] [2021-05-02 17:57:22,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 17:57:22,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:57:22,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 17:57:22,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 17:57:22,151 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 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 17:57:22,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:57:22,333 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 17:57:22,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 17:57:22,333 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 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 104 [2021-05-02 17:57:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:57:22,334 INFO L225 Difference]: With dead ends: 108 [2021-05-02 17:57:22,334 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 17:57:22,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 17:57:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 17:57:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 17:57:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 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 17:57:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-02 17:57:22,336 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-02 17:57:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:57:22,336 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-02 17:57:22,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 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 17:57:22,336 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-02 17:57:22,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 17:57:22,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:57:22,337 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:57:22,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 17:57:22,537 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:57:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:57:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash -583773671, now seen corresponding path program 47 times [2021-05-02 17:57:22,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:57:22,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514819204] [2021-05-02 17:57:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:57:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:23,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:57:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:57:23,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:57:23,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514819204] [2021-05-02 17:57:23,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514819204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:23,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19626245] [2021-05-02 17:57:23,433 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 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 17:57:28,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-02 17:57:28,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:57:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 17:57:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:57:28,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:57:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:57:28,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19626245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:28,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:57:28,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 17:57:28,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034784792] [2021-05-02 17:57:28,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 17:57:28,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:57:28,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 17:57:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:57:28,970 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 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 17:57:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:57:29,155 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 17:57:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 17:57:29,156 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 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 106 [2021-05-02 17:57:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:57:29,156 INFO L225 Difference]: With dead ends: 110 [2021-05-02 17:57:29,156 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 17:57:29,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 846.0ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:57:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 17:57:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 17:57:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 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 17:57:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-02 17:57:29,158 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-02 17:57:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:57:29,158 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-02 17:57:29,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 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 17:57:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-02 17:57:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 17:57:29,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:57:29,159 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:57:29,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:57:29,373 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:57:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:57:29,373 INFO L82 PathProgramCache]: Analyzing trace with hash -148767205, now seen corresponding path program 48 times [2021-05-02 17:57:29,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:57:29,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745876736] [2021-05-02 17:57:29,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:57:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:30,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:57:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:57:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:57:30,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:57:30,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745876736] [2021-05-02 17:57:30,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745876736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:57:30,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994022881] [2021-05-02 17:57:30,285 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 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 17:59:09,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-02 17:59:09,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:59:09,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 17:59:09,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:59:09,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:09,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994022881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:09,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:59:09,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 17:59:09,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647133431] [2021-05-02 17:59:09,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 17:59:09,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:59:09,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 17:59:09,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:59:09,432 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 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 17:59:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:59:09,611 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 17:59:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 17:59:09,611 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 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 108 [2021-05-02 17:59:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:59:09,612 INFO L225 Difference]: With dead ends: 112 [2021-05-02 17:59:09,612 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 17:59:09,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 872.5ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:59:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 17:59:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-02 17:59:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 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 17:59:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-02 17:59:09,614 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-02 17:59:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:59:09,614 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-02 17:59:09,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 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 17:59:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-02 17:59:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 17:59:09,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:59:09,615 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:59:09,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 17:59:09,829 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:59:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:59:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1280618909, now seen corresponding path program 49 times [2021-05-02 17:59:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:59:09,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392974982] [2021-05-02 17:59:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:59:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:10,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:59:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:10,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:59:10,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392974982] [2021-05-02 17:59:10,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392974982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:10,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38155794] [2021-05-02 17:59:10,780 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 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 17:59:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 17:59:10,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:59:10,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:10,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:11,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38155794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:11,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:59:11,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2021-05-02 17:59:11,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978410220] [2021-05-02 17:59:11,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 17:59:11,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:59:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 17:59:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 17:59:11,005 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 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 17:59:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:59:11,173 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 17:59:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 17:59:11,174 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 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 110 [2021-05-02 17:59:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:59:11,174 INFO L225 Difference]: With dead ends: 114 [2021-05-02 17:59:11,174 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 17:59:11,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 912.9ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 17:59:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 17:59:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 17:59:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 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 17:59:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-02 17:59:11,176 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-02 17:59:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:59:11,176 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-02 17:59:11,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 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 17:59:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-02 17:59:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 17:59:11,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:59:11,177 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:59:11,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:59:11,393 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:59:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:59:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 531139743, now seen corresponding path program 50 times [2021-05-02 17:59:11,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:59:11,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075470309] [2021-05-02 17:59:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:59:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:12,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:59:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:12,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:59:12,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075470309] [2021-05-02 17:59:12,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075470309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:12,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995103993] [2021-05-02 17:59:12,367 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 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 17:59:12,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:59:12,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:59:12,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 17:59:12,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:59:12,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:12,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995103993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:12,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:59:12,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 17:59:12,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619573256] [2021-05-02 17:59:12,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 17:59:12,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:59:12,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 17:59:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 17:59:12,600 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 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 17:59:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:59:12,722 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 17:59:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 17:59:12,723 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 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 112 [2021-05-02 17:59:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:59:12,724 INFO L225 Difference]: With dead ends: 116 [2021-05-02 17:59:12,725 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 17:59:12,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 932.8ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 17:59:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 17:59:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 17:59:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 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 17:59:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-02 17:59:12,727 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-02 17:59:12,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:59:12,727 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-02 17:59:12,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 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 17:59:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-02 17:59:12,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 17:59:12,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:59:12,728 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:59:12,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:59:12,933 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:59:12,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:59:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1836166945, now seen corresponding path program 51 times [2021-05-02 17:59:12,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:59:12,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203484141] [2021-05-02 17:59:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:59:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:13,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:59:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:13,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:59:13,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203484141] [2021-05-02 17:59:13,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203484141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:13,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213944419] [2021-05-02 17:59:13,959 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 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 18:05:53,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-02 18:05:53,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:05:53,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 18:05:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:05:53,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:05:53,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213944419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:05:53,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:05:53,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 18:05:53,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918779029] [2021-05-02 18:05:53,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 18:05:53,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:05:53,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 18:05:53,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:05:53,913 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 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 18:05:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:05:54,112 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 18:05:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 18:05:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 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 114 [2021-05-02 18:05:54,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:05:54,113 INFO L225 Difference]: With dead ends: 118 [2021-05-02 18:05:54,113 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 18:05:54,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 990.9ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:05:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 18:05:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-02 18:05:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 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 18:05:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-02 18:05:54,114 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-02 18:05:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:05:54,115 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-02 18:05:54,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 55 states have internal predecessors, (114), 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 18:05:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-02 18:05:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 18:05:54,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:05:54,115 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:05:54,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 18:05:54,316 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:05:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:05:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1836857635, now seen corresponding path program 52 times [2021-05-02 18:05:54,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:05:54,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360266053] [2021-05-02 18:05:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:05:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:05:55,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:05:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:05:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:05:55,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:05:55,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360266053] [2021-05-02 18:05:55,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360266053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:05:55,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250614506] [2021-05-02 18:05:55,379 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 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 [2021-05-02 18:05:55,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:05:55,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:05:55,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 18:05:55,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:05:55,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:05:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:05:55,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250614506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:05:55,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:05:55,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2021-05-02 18:05:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430237551] [2021-05-02 18:05:55,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 18:05:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:05:55,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 18:05:55,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 18:05:55,634 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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 18:05:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:05:55,843 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 18:05:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 18:05:55,843 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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 116 [2021-05-02 18:05:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:05:55,844 INFO L225 Difference]: With dead ends: 120 [2021-05-02 18:05:55,844 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 18:05:55,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1022.9ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 18:05:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 18:05:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-05-02 18:05:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 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 18:05:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-02 18:05:55,849 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-02 18:05:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:05:55,850 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-02 18:05:55,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 56 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 18:05:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-02 18:05:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 18:05:55,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:05:55,850 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:05:56,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:05:56,065 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:05:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:05:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1794356571, now seen corresponding path program 53 times [2021-05-02 18:05:56,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:05:56,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306021676] [2021-05-02 18:05:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:05:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:05:57,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:05:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:05:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:05:57,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:05:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306021676] [2021-05-02 18:05:57,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306021676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:05:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231631745] [2021-05-02 18:05:57,180 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true