/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_2-1-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:51:40,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:51:40,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:51:40,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:51:40,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:51:40,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:51:40,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:51:40,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:51:40,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:51:40,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:51:40,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:51:40,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:51:40,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:51:40,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:51:40,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:51:40,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:51:40,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:51:40,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:51:40,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:51:40,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:51:40,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:51:40,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:51:40,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:51:40,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:51:40,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:51:40,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:51:40,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:51:40,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:51:40,104 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:51:40,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:51:40,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:51:40,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:51:40,121 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:51:40,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:51:40,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:51:40,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:51:40,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:51:40,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:51:40,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:51:40,122 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:51:40,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:51:40,122 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:51:40,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:51:40,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:51:40,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:51:40,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:51:40,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:51:40,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:51:40,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:51:40,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:51:40,124 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:51:40,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:51:40,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:51:40,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:51:40,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:51:40,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:51:40,435 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:51:40,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2021-05-02 17:51:40,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34566d3d9/924a5942a08f4d1c8bff753aff2d1276/FLAGb80240d79 [2021-05-02 17:51:40,866 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:51:40,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2021-05-02 17:51:40,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34566d3d9/924a5942a08f4d1c8bff753aff2d1276/FLAGb80240d79 [2021-05-02 17:51:40,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34566d3d9/924a5942a08f4d1c8bff753aff2d1276 [2021-05-02 17:51:40,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:51:40,892 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:51:40,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:40,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:51:40,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:51:40,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:40" (1/1) ... [2021-05-02 17:51:40,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe2a1bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:40, skipping insertion in model container [2021-05-02 17:51:40,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:51:40" (1/1) ... [2021-05-02 17:51:40,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:51:40,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:51:41,037 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_2-1-simple.i[809,822] [2021-05-02 17:51:41,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:41,060 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:51:41,068 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_2-1-simple.i[809,822] [2021-05-02 17:51:41,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:51:41,104 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:51:41,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:41 WrapperNode [2021-05-02 17:51:41,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:51:41,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:51:41,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:51:41,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:51:41,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:41" (1/1) ... [2021-05-02 17:51:41,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:41" (1/1) ... [2021-05-02 17:51:41,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:41" (1/1) ... [2021-05-02 17:51:41,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:41" (1/1) ... [2021-05-02 17:51:41,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:41" (1/1) ... [2021-05-02 17:51:41,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:41" (1/1) ... [2021-05-02 17:51:41,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:41" (1/1) ... [2021-05-02 17:51:41,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:51:41,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:51:41,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:51:41,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:51:41,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:41" (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 17:51:41,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:51:41,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:51:41,321 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:51:41,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:51:41,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:51:41,322 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:51:41,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:51:41,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 17:51:41,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 17:51:41,322 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:51:41,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:51:41,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:51:41,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:51:41,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-05-02 17:51:41,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:51:41,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:51:41,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:51:41,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:51:41,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:51:41,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:51:41,603 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:51:41,603 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:51:41,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:41 BoogieIcfgContainer [2021-05-02 17:51:41,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:51:41,605 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:51:41,605 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:51:41,606 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:51:41,608 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:41" (1/1) ... [2021-05-02 17:51:41,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:41 BasicIcfg [2021-05-02 17:51:41,620 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:51:41,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:51:41,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:51:41,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:51:41,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:51:40" (1/4) ... [2021-05-02 17:51:41,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114788a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:41, skipping insertion in model container [2021-05-02 17:51:41,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:51:41" (2/4) ... [2021-05-02 17:51:41,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114788a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:51:41, skipping insertion in model container [2021-05-02 17:51:41,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:51:41" (3/4) ... [2021-05-02 17:51:41,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114788a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:51:41, skipping insertion in model container [2021-05-02 17:51:41,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:51:41" (4/4) ... [2021-05-02 17:51:41,625 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.iJordan [2021-05-02 17:51:41,628 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:51:41,631 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:51:41,641 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:51:41,654 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:51:41,654 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:51:41,654 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:51:41,655 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:51:41,655 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:51:41,655 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:51:41,655 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:51:41,655 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:51:41,664 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 17:51:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:51:41,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:41,669 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:41,669 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:41,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1502470948, now seen corresponding path program 1 times [2021-05-02 17:51:41,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:41,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321880638] [2021-05-02 17:51:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:41,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:41,810 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 17:51:41,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:41,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321880638] [2021-05-02 17:51:41,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321880638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:41,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:41,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:51:41,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692852899] [2021-05-02 17:51:41,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:51:41,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:41,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:51:41,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:41,825 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 17:51:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:41,865 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 17:51:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:51:41,867 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 17:51:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:41,871 INFO L225 Difference]: With dead ends: 21 [2021-05-02 17:51:41,871 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 17:51:41,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:51:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 17:51:41,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 17:51:41,891 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 17:51:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 17:51:41,893 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 17:51:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:41,893 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 17:51:41,893 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 17:51:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 17:51:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:51:41,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:41,894 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:41,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:51:41,894 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1473841797, now seen corresponding path program 1 times [2021-05-02 17:51:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:41,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433703885] [2021-05-02 17:51:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:41,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:41,964 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 17:51:41,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:41,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433703885] [2021-05-02 17:51:41,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433703885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:51:41,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:51:41,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:51:41,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715796674] [2021-05-02 17:51:41,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:51:41,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:41,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:51:41,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:41,967 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 17:51:41,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:41,997 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-05-02 17:51:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:51:41,998 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 17:51:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:41,999 INFO L225 Difference]: With dead ends: 16 [2021-05-02 17:51:41,999 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 17:51:41,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:51:42,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 17:51:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 17:51:42,001 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 17:51:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 17:51:42,002 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 17:51:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:42,002 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 17:51:42,002 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 17:51:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 17:51:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 17:51:42,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:42,003 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:42,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:51:42,003 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:42,004 INFO L82 PathProgramCache]: Analyzing trace with hash -805744227, now seen corresponding path program 1 times [2021-05-02 17:51:42,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:42,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861500253] [2021-05-02 17:51:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:42,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:42,076 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 17:51:42,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:42,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861500253] [2021-05-02 17:51:42,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861500253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:42,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243951557] [2021-05-02 17:51:42,077 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 17:51:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:42,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 17:51:42,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:42,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,257 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 17:51:42,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243951557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:42,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:42,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 17:51:42,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350711842] [2021-05-02 17:51:42,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:51:42,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:42,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:51:42,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:42,266 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 17:51:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:42,311 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 17:51:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:51:42,312 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 17:51:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:42,313 INFO L225 Difference]: With dead ends: 18 [2021-05-02 17:51:42,313 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 17:51:42,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:51:42,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 17:51:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 17:51:42,315 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 17:51:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 17:51:42,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 17:51:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:42,316 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 17:51:42,316 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 17:51:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 17:51:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 17:51:42,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:42,317 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:42,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:51:42,535 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:42,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:42,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1285893439, now seen corresponding path program 2 times [2021-05-02 17:51:42,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:42,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675816155] [2021-05-02 17:51:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:42,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:42,597 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 17:51:42,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:42,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675816155] [2021-05-02 17:51:42,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675816155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:42,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579780948] [2021-05-02 17:51:42,597 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 17:51:42,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:42,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:42,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 17:51:42,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:42,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:42,762 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 17:51:42,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579780948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:42,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:42,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 17:51:42,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250764487] [2021-05-02 17:51:42,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:51:42,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:42,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:51:42,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:51:42,764 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 17:51:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:42,829 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 17:51:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:51:42,830 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 17:51:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:42,830 INFO L225 Difference]: With dead ends: 20 [2021-05-02 17:51:42,830 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 17:51:42,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:51:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 17:51:42,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 17:51:42,833 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 17:51:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 17:51:42,833 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 17:51:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:42,833 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 17:51:42,833 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 17:51:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 17:51:42,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:51:42,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:42,834 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:43,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:43,045 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:43,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1304995937, now seen corresponding path program 3 times [2021-05-02 17:51:43,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:43,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558338815] [2021-05-02 17:51:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:43,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:43,113 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 17:51:43,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:43,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558338815] [2021-05-02 17:51:43,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558338815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:43,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049747448] [2021-05-02 17:51:43,113 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 17:51:43,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:51:43,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:51:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:43,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,213 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 17:51:43,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049747448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:43,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:43,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 17:51:43,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035525072] [2021-05-02 17:51:43,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:51:43,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:43,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:51:43,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:43,215 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 17:51:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:43,271 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 17:51:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:51:43,271 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 17:51:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:43,272 INFO L225 Difference]: With dead ends: 22 [2021-05-02 17:51:43,272 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 17:51:43,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:51:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 17:51:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 17:51:43,274 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 17:51:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 17:51:43,275 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-02 17:51:43,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:43,275 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 17:51:43,275 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 17:51:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 17:51:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 17:51:43,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:43,275 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:43,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:43,496 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1812339965, now seen corresponding path program 4 times [2021-05-02 17:51:43,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:43,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313286798] [2021-05-02 17:51:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:43,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:43,560 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 17:51:43,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:43,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313286798] [2021-05-02 17:51:43,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313286798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:43,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570307314] [2021-05-02 17:51:43,561 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 17:51:43,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:43,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:43,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 17:51:43,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:43,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:43,680 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 17:51:43,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570307314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:43,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:43,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 17:51:43,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821575710] [2021-05-02 17:51:43,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:51:43,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:43,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:51:43,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:51:43,682 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 17:51:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:43,725 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 17:51:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:51:43,726 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 17:51:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:43,727 INFO L225 Difference]: With dead ends: 24 [2021-05-02 17:51:43,727 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 17:51:43,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:51:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 17:51:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-02 17:51:43,731 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 17:51:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 17:51:43,733 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-02 17:51:43,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:43,733 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 17:51:43,735 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 17:51:43,735 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 17:51:43,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:51:43,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:43,736 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:43,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:43,954 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:43,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:43,955 INFO L82 PathProgramCache]: Analyzing trace with hash 315030821, now seen corresponding path program 5 times [2021-05-02 17:51:43,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:43,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562088786] [2021-05-02 17:51:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:44,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:44,020 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 17:51:44,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:44,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562088786] [2021-05-02 17:51:44,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562088786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:44,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137249150] [2021-05-02 17:51:44,020 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 17:51:44,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 17:51:44,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:44,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:51:44,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:44,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,126 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 17:51:44,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137249150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:44,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:44,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 17:51:44,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121613343] [2021-05-02 17:51:44,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:51:44,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:44,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:51:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:51:44,127 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 17:51:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:44,157 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 17:51:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:51:44,158 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 17:51:44,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:44,158 INFO L225 Difference]: With dead ends: 26 [2021-05-02 17:51:44,158 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:51:44,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:51:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:51:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 17:51:44,160 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 17:51:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 17:51:44,161 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-02 17:51:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:44,161 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 17:51:44,161 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 17:51:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 17:51:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 17:51:44,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:44,162 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:44,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:51:44,365 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash 313923271, now seen corresponding path program 6 times [2021-05-02 17:51:44,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:44,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922777696] [2021-05-02 17:51:44,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:44,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:44,484 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 17:51:44,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:44,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922777696] [2021-05-02 17:51:44,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922777696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:44,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300367912] [2021-05-02 17:51:44,484 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 17:51:44,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 17:51:44,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:44,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:51:44,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:44,648 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 17:51:44,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300367912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:44,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:44,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 17:51:44,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474880299] [2021-05-02 17:51:44,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:51:44,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:44,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:51:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:44,651 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 17:51:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:44,683 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 17:51:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:51:44,684 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 17:51:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:44,685 INFO L225 Difference]: With dead ends: 28 [2021-05-02 17:51:44,685 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 17:51:44,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:51:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 17:51:44,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 17:51:44,689 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 17:51:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 17:51:44,690 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-02 17:51:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:44,690 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 17:51:44,691 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 17:51:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 17:51:44,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 17:51:44,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:44,692 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:44,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:44,905 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:44,906 INFO L82 PathProgramCache]: Analyzing trace with hash -750432279, now seen corresponding path program 7 times [2021-05-02 17:51:44,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:44,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929471401] [2021-05-02 17:51:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,037 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 17:51:45,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:45,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929471401] [2021-05-02 17:51:45,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929471401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:45,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944813741] [2021-05-02 17:51:45,038 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 17:51:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 17:51:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:45,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,143 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 17:51:45,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944813741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:45,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:45,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 17:51:45,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756844019] [2021-05-02 17:51:45,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:51:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:45,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:51:45,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:51:45,145 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 17:51:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:45,196 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 17:51:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:51:45,196 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 17:51:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:45,197 INFO L225 Difference]: With dead ends: 30 [2021-05-02 17:51:45,197 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 17:51:45,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:51:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 17:51:45,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 17:51:45,199 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 17:51:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 17:51:45,199 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-02 17:51:45,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:45,200 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 17:51:45,200 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 17:51:45,200 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 17:51:45,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 17:51:45,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:45,200 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:45,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:45,418 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:45,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1393899381, now seen corresponding path program 8 times [2021-05-02 17:51:45,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:45,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31504577] [2021-05-02 17:51:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,509 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 17:51:45,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31504577] [2021-05-02 17:51:45,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31504577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3786077] [2021-05-02 17:51:45,509 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 17:51:45,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:45,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:51:45,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:45,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:45,620 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 17:51:45,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3786077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:45,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:45,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 17:51:45,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483476503] [2021-05-02 17:51:45,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:51:45,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:45,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:51:45,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:51:45,622 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 17:51:45,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:45,656 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 17:51:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:51:45,656 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 17:51:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:45,657 INFO L225 Difference]: With dead ends: 32 [2021-05-02 17:51:45,657 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 17:51:45,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:51:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 17:51:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 17:51:45,659 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 17:51:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 17:51:45,659 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-02 17:51:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:45,659 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 17:51:45,659 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 17:51:45,660 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 17:51:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 17:51:45,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:45,660 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:45,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:51:45,877 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:45,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1290493779, now seen corresponding path program 9 times [2021-05-02 17:51:45,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:45,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251790464] [2021-05-02 17:51:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:45,975 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 17:51:45,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:45,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251790464] [2021-05-02 17:51:45,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251790464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:45,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754852880] [2021-05-02 17:51:45,975 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 17:51:46,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 17:51:46,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:46,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 17:51:46,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:46,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,111 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 17:51:46,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754852880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:46,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:46,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 17:51:46,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919307538] [2021-05-02 17:51:46,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 17:51:46,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:46,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 17:51:46,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:51:46,113 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 17:51:46,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:46,168 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 17:51:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 17:51:46,168 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 17:51:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:46,169 INFO L225 Difference]: With dead ends: 34 [2021-05-02 17:51:46,169 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 17:51:46,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:51:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 17:51:46,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 17:51:46,171 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 17:51:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 17:51:46,171 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-02 17:51:46,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:46,172 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 17:51:46,172 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 17:51:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 17:51:46,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 17:51:46,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:46,172 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:46,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:46,389 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:46,390 INFO L82 PathProgramCache]: Analyzing trace with hash -701958065, now seen corresponding path program 10 times [2021-05-02 17:51:46,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:46,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489915217] [2021-05-02 17:51:46,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:46,497 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 17:51:46,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:46,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489915217] [2021-05-02 17:51:46,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489915217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:46,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303376593] [2021-05-02 17:51:46,497 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 17:51:46,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:46,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:46,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:51:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:46,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:46,651 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 17:51:46,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303376593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:46,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:46,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-02 17:51:46,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037456826] [2021-05-02 17:51:46,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 17:51:46,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:46,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 17:51:46,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:51:46,652 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 17:51:46,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:46,711 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 17:51:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 17:51:46,712 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 17:51:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:46,712 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:51:46,712 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 17:51:46,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:51:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 17:51:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 17:51:46,714 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 17:51:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 17:51:46,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-02 17:51:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:46,715 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 17:51:46,715 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 17:51:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 17:51:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 17:51:46,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:46,715 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:46,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:46,933 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:46,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2054819983, now seen corresponding path program 11 times [2021-05-02 17:51:46,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:46,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50665142] [2021-05-02 17:51:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:47,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:47,063 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 17:51:47,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:47,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50665142] [2021-05-02 17:51:47,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50665142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:47,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760806053] [2021-05-02 17:51:47,064 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 17:51:47,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 17:51:47,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:47,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 17:51:47,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:47,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,211 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 17:51:47,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760806053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:47,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:47,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 17:51:47,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549606280] [2021-05-02 17:51:47,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 17:51:47,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:47,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 17:51:47,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:51:47,212 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 17:51:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:47,257 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 17:51:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 17:51:47,257 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 17:51:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:47,258 INFO L225 Difference]: With dead ends: 38 [2021-05-02 17:51:47,258 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 17:51:47,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:51:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 17:51:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 17:51:47,260 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 17:51:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 17:51:47,260 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-02 17:51:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:47,260 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 17:51:47,260 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 17:51:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 17:51:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:51:47,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:47,261 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:47,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 17:51:47,477 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:47,477 INFO L82 PathProgramCache]: Analyzing trace with hash -780032493, now seen corresponding path program 12 times [2021-05-02 17:51:47,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:47,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457171634] [2021-05-02 17:51:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:47,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:47,597 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 17:51:47,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:47,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457171634] [2021-05-02 17:51:47,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457171634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:47,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195615251] [2021-05-02 17:51:47,598 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 17:51:47,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 17:51:47,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:47,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:51:47,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:47,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:47,846 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 17:51:47,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195615251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:47,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:47,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 17:51:47,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473993088] [2021-05-02 17:51:47,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 17:51:47,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 17:51:47,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:51:47,848 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 17:51:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:47,894 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 17:51:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:51:47,895 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 17:51:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:47,895 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:51:47,895 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 17:51:47,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 17:51:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 17:51:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 17:51:47,897 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 17:51:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 17:51:47,898 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 17:51:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:47,898 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 17:51:47,898 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 17:51:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 17:51:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 17:51:47,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:47,899 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:48,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 17:51:48,115 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:48,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash 225066037, now seen corresponding path program 13 times [2021-05-02 17:51:48,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:48,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203224487] [2021-05-02 17:51:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,238 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 17:51:48,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:48,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203224487] [2021-05-02 17:51:48,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203224487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:48,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542856622] [2021-05-02 17:51:48,238 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 17:51:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:51:48,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:48,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,366 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 17:51:48,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542856622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:48,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:48,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 17:51:48,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429364332] [2021-05-02 17:51:48,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 17:51:48,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:48,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 17:51:48,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:51:48,368 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 17:51:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:48,424 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 17:51:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 17:51:48,424 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 17:51:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:48,424 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:51:48,425 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 17:51:48,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:51:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 17:51:48,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 17:51:48,426 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 17:51:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 17:51:48,427 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-02 17:51:48,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:48,427 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 17:51:48,427 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 17:51:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 17:51:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:51:48,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:48,428 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:48,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 17:51:48,646 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:48,646 INFO L82 PathProgramCache]: Analyzing trace with hash -242888233, now seen corresponding path program 14 times [2021-05-02 17:51:48,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:48,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286721395] [2021-05-02 17:51:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:48,777 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 17:51:48,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:48,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286721395] [2021-05-02 17:51:48,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286721395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:48,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147562844] [2021-05-02 17:51:48,777 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 17:51:48,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:48,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:48,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 17:51:48,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:48,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:48,907 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 17:51:48,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147562844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:48,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:48,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 17:51:48,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090238746] [2021-05-02 17:51:48,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 17:51:48,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:48,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 17:51:48,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:51:48,908 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 17:51:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:48,963 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 17:51:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 17:51:48,963 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 17:51:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:48,964 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:51:48,964 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 17:51:48,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:51:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 17:51:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 17:51:48,966 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 17:51:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 17:51:48,966 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-02 17:51:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:48,966 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 17:51:48,966 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 17:51:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 17:51:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 17:51:48,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:48,967 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:49,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:49,183 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:49,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:49,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1024624377, now seen corresponding path program 15 times [2021-05-02 17:51:49,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:49,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910688559] [2021-05-02 17:51:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,331 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 17:51:49,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:49,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910688559] [2021-05-02 17:51:49,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910688559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:49,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691826538] [2021-05-02 17:51:49,331 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 17:51:49,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 17:51:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:51:49,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:49,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:49,503 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 17:51:49,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691826538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:49,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:49,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 17:51:49,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336167123] [2021-05-02 17:51:49,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 17:51:49,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:49,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 17:51:49,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:51:49,504 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 17:51:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:49,566 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 17:51:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 17:51:49,566 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 17:51:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:49,567 INFO L225 Difference]: With dead ends: 46 [2021-05-02 17:51:49,567 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 17:51:49,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:51:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 17:51:49,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 17:51:49,568 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 17:51:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 17:51:49,569 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-02 17:51:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:49,569 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 17:51:49,569 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 17:51:49,569 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 17:51:49,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:51:49,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:49,585 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:49,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 17:51:49,798 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:49,798 INFO L82 PathProgramCache]: Analyzing trace with hash -666469477, now seen corresponding path program 16 times [2021-05-02 17:51:49,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:49,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739024091] [2021-05-02 17:51:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:49,950 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 17:51:49,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:49,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739024091] [2021-05-02 17:51:49,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739024091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:49,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617542087] [2021-05-02 17:51:49,950 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 17:51:49,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:49,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:49,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 17:51:49,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:50,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,121 WARN L159 QuantifierPusher]: Ignoring assumption. [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 17:51:50,130 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 17:51:50,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617542087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:50,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:50,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2021-05-02 17:51:50,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759562202] [2021-05-02 17:51:50,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 17:51:50,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:50,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 17:51:50,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:51:50,132 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 17:51:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:50,227 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 17:51:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 17:51:50,241 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 17:51:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:50,241 INFO L225 Difference]: With dead ends: 48 [2021-05-02 17:51:50,241 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:51:50,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:51:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:51:50,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-02 17:51:50,243 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 17:51:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 17:51:50,244 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-02 17:51:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:50,244 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 17:51:50,244 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 17:51:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 17:51:50,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 17:51:50,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:50,244 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:50,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 17:51:50,445 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1984942013, now seen corresponding path program 17 times [2021-05-02 17:51:50,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:50,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507884553] [2021-05-02 17:51:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:50,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:50,606 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 17:51:50,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:50,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507884553] [2021-05-02 17:51:50,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507884553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:50,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058564087] [2021-05-02 17:51:50,606 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 17:51:50,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 17:51:50,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:50,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:51:50,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:50,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:50,828 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 17:51:50,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058564087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:50,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:50,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 17:51:50,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760267097] [2021-05-02 17:51:50,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 17:51:50,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:50,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 17:51:50,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:51:50,829 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 17:51:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:50,899 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 17:51:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 17:51:50,899 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 17:51:50,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:50,900 INFO L225 Difference]: With dead ends: 50 [2021-05-02 17:51:50,900 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 17:51:50,900 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:51:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 17:51:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 17:51:50,902 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 17:51:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 17:51:50,902 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-02 17:51:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:50,902 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 17:51:50,903 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 17:51:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 17:51:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 17:51:50,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:50,903 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:51,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:51,120 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:51,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1219189921, now seen corresponding path program 18 times [2021-05-02 17:51:51,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:51,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443459974] [2021-05-02 17:51:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:51,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:51,344 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 17:51:51,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:51,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443459974] [2021-05-02 17:51:51,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443459974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:51,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280915558] [2021-05-02 17:51:51,344 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 17:51:51,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 17:51:51,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:51:51,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:51,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:51,640 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 17:51:51,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280915558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:51,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:51,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 17:51:51,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013708005] [2021-05-02 17:51:51,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:51:51,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:51,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:51:51,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:51:51,641 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 17:51:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:51,726 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 17:51:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 17:51:51,726 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 17:51:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:51,727 INFO L225 Difference]: With dead ends: 52 [2021-05-02 17:51:51,727 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 17:51:51,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:51:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 17:51:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 17:51:51,728 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 17:51:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 17:51:51,729 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-02 17:51:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:51,729 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 17:51:51,729 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 17:51:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 17:51:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 17:51:51,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:51,730 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:51,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:51,946 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:51,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:51,946 INFO L82 PathProgramCache]: Analyzing trace with hash -898427263, now seen corresponding path program 19 times [2021-05-02 17:51:51,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:51,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108031201] [2021-05-02 17:51:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:52,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:52,137 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 17:51:52,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:52,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108031201] [2021-05-02 17:51:52,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108031201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:52,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773295841] [2021-05-02 17:51:52,137 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 17:51:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 17:51:52,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:52,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,278 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 17:51:52,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773295841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:52,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:52,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 17:51:52,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549210249] [2021-05-02 17:51:52,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 17:51:52,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:52,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 17:51:52,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:51:52,280 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 17:51:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:52,341 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 17:51:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 17:51:52,341 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 17:51:52,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:52,342 INFO L225 Difference]: With dead ends: 54 [2021-05-02 17:51:52,342 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 17:51:52,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:51:52,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 17:51:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 17:51:52,344 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 17:51:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 17:51:52,344 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-02 17:51:52,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:52,344 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 17:51:52,344 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 17:51:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 17:51:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 17:51:52,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:52,345 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:52,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:52,563 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:52,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1883158237, now seen corresponding path program 20 times [2021-05-02 17:51:52,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:52,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174911591] [2021-05-02 17:51:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:52,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:52,793 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 17:51:52,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:52,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174911591] [2021-05-02 17:51:52,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174911591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:52,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840744149] [2021-05-02 17:51:52,793 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 17:51:52,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:52,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:52,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:51:52,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:52,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:52,928 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 17:51:52,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840744149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:52,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:52,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 17:51:52,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067111544] [2021-05-02 17:51:52,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:51:52,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:52,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:51:52,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:51:52,929 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 17:51:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:52,982 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 17:51:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 17:51:52,982 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 17:51:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:52,983 INFO L225 Difference]: With dead ends: 56 [2021-05-02 17:51:52,983 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 17:51:52,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:51:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 17:51:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 17:51:52,985 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 17:51:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 17:51:52,986 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-02 17:51:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:52,986 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 17:51:52,986 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 17:51:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 17:51:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 17:51:52,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:52,986 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:53,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 17:51:53,191 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash 978148165, now seen corresponding path program 21 times [2021-05-02 17:51:53,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:53,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855684515] [2021-05-02 17:51:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:53,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:53,429 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 17:51:53,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:53,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855684515] [2021-05-02 17:51:53,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855684515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:53,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667525193] [2021-05-02 17:51:53,430 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 17:51:53,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 17:51:53,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:51:53,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:53,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:53,717 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 17:51:53,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667525193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:53,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:53,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 17:51:53,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654615646] [2021-05-02 17:51:53,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 17:51:53,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:53,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 17:51:53,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:51:53,719 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 17:51:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:53,782 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 17:51:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 17:51:53,802 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 17:51:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:53,802 INFO L225 Difference]: With dead ends: 58 [2021-05-02 17:51:53,802 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 17:51:53,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 17:51:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 17:51:53,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 17:51:53,804 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 17:51:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 17:51:53,804 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-02 17:51:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:53,804 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 17:51:53,804 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 17:51:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 17:51:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 17:51:53,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:53,805 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:54,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 17:51:54,023 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:54,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:54,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1914531047, now seen corresponding path program 22 times [2021-05-02 17:51:54,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:54,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864218216] [2021-05-02 17:51:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:54,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:54,253 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 17:51:54,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:54,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864218216] [2021-05-02 17:51:54,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864218216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:54,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761103873] [2021-05-02 17:51:54,253 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 17:51:54,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:51:54,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 17:51:54,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:54,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:54,397 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 17:51:54,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761103873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:54,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:54,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2021-05-02 17:51:54,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448791545] [2021-05-02 17:51:54,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 17:51:54,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:54,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 17:51:54,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 17:51:54,399 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 17:51:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:54,483 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 17:51:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 17:51:54,483 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 17:51:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:54,484 INFO L225 Difference]: With dead ends: 60 [2021-05-02 17:51:54,484 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 17:51:54,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 17:51:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 17:51:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 17:51:54,485 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 17:51:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 17:51:54,486 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-02 17:51:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:54,486 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 17:51:54,486 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 17:51:54,486 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 17:51:54,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 17:51:54,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:54,486 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:54,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:54,689 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:54,689 INFO L82 PathProgramCache]: Analyzing trace with hash -164651511, now seen corresponding path program 23 times [2021-05-02 17:51:54,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:54,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611108146] [2021-05-02 17:51:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:54,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:54,967 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 17:51:54,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:54,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611108146] [2021-05-02 17:51:54,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611108146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:54,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500756644] [2021-05-02 17:51:54,968 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 17:51:55,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 17:51:55,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:55,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 17:51:55,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:55,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:55,411 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 17:51:55,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500756644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:55,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:55,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 17:51:55,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194678224] [2021-05-02 17:51:55,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 17:51:55,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:55,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 17:51:55,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:51:55,413 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 17:51:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:55,493 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 17:51:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 17:51:55,493 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 17:51:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:55,493 INFO L225 Difference]: With dead ends: 62 [2021-05-02 17:51:55,493 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 17:51:55,494 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:51:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 17:51:55,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 17:51:55,495 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 17:51:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 17:51:55,495 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-02 17:51:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:55,495 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 17:51:55,495 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 17:51:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 17:51:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 17:51:55,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:55,496 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:55,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 17:51:55,712 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:55,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1099297109, now seen corresponding path program 24 times [2021-05-02 17:51:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:55,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108990276] [2021-05-02 17:51:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:55,988 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 17:51:55,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:55,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108990276] [2021-05-02 17:51:55,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108990276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:55,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035468511] [2021-05-02 17:51:55,989 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 17:51:57,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 17:51:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:57,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 17:51:57,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:57,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:57,598 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 17:51:57,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035468511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:57,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:57,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 17:51:57,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187213433] [2021-05-02 17:51:57,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:51:57,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:57,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:51:57,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:51:57,600 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 17:51:57,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:57,712 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 17:51:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 17:51:57,713 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 17:51:57,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:57,713 INFO L225 Difference]: With dead ends: 64 [2021-05-02 17:51:57,713 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 17:51:57,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:51:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 17:51:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 17:51:57,715 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 17:51:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 17:51:57,715 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-02 17:51:57,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:57,715 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 17:51:57,715 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 17:51:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 17:51:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 17:51:57,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:57,716 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:57,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:57,934 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:57,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1645551923, now seen corresponding path program 25 times [2021-05-02 17:51:57,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:57,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798551808] [2021-05-02 17:51:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,228 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 17:51:58,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:58,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798551808] [2021-05-02 17:51:58,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798551808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929109881] [2021-05-02 17:51:58,228 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 17:51:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:51:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:58,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,293 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 17:51:58,299 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 17:51:58,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,317 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 17:51:58,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,327 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 17:51:58,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:58,382 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 17:51:58,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929109881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:58,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:58,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-02 17:51:58,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456625391] [2021-05-02 17:51:58,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 17:51:58,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:58,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 17:51:58,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:51:58,384 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 17:51:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:58,478 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 17:51:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 17:51:58,479 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 17:51:58,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:58,479 INFO L225 Difference]: With dead ends: 66 [2021-05-02 17:51:58,479 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 17:51:58,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:51:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 17:51:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 17:51:58,483 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 17:51:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 17:51:58,484 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-02 17:51:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:58,484 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 17:51:58,485 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 17:51:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 17:51:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 17:51:58,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:58,485 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:58,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 17:51:58,709 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__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 1684549231, now seen corresponding path program 26 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 [435861389] [2021-05-02 17:51:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,054 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 17:51:59,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:59,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435861389] [2021-05-02 17:51:59,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435861389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188257098] [2021-05-02 17:51:59,054 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 17:51:59,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:51:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:51:59,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:51:59,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:59,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:59,227 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 17:51:59,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188257098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:51:59,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 17:51:59,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836436916] [2021-05-02 17:51:59,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 17:51:59,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:51:59,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 17:51:59,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:51:59,228 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 17:51:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:59,292 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 17:51:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 17:51:59,293 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 17:51:59,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:59,293 INFO L225 Difference]: With dead ends: 68 [2021-05-02 17:51:59,293 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 17:51:59,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:51:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 17:51:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-02 17:51:59,295 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 17:51:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-02 17:51:59,295 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-02 17:51:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:59,295 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-02 17:51:59,295 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 17:51:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-02 17:51:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 17:51:59,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:59,296 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:59,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 17:51:59,511 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:59,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2133844591, now seen corresponding path program 27 times [2021-05-02 17:51:59,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:59,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768737138] [2021-05-02 17:51:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:59,877 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 17:51:59,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:59,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768737138] [2021-05-02 17:51:59,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768737138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:59,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771935478] [2021-05-02 17:51:59,878 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 17:52:00,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 17:52:00,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:00,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 17:52:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:00,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:00,641 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 17:52:00,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771935478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:00,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:00,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 17:52:00,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365459338] [2021-05-02 17:52:00,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:52:00,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:00,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:52:00,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:52:00,642 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 17:52:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:00,754 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 17:52:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 17:52:00,754 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 17:52:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:00,754 INFO L225 Difference]: With dead ends: 70 [2021-05-02 17:52:00,754 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 17:52:00,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:52:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 17:52:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 17:52:00,757 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 17:52:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-02 17:52:00,757 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-02 17:52:00,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:00,759 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-02 17:52:00,759 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 17:52:00,759 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-02 17:52:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 17:52:00,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:00,759 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:00,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 17:52:00,965 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:00,965 INFO L82 PathProgramCache]: Analyzing trace with hash 586730547, now seen corresponding path program 28 times [2021-05-02 17:52:00,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:00,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712047250] [2021-05-02 17:52:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:01,352 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 17:52:01,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:01,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712047250] [2021-05-02 17:52:01,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712047250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471665723] [2021-05-02 17:52:01,352 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 17:52:01,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:01,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 17:52:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:01,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:01,532 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 17:52:01,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471665723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:01,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:01,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2021-05-02 17:52:01,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692975661] [2021-05-02 17:52:01,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 17:52:01,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:01,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 17:52:01,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:52:01,535 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 17:52:01,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:01,642 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 17:52:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 17:52:01,642 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 17:52:01,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:01,643 INFO L225 Difference]: With dead ends: 72 [2021-05-02 17:52:01,643 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 17:52:01,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:52:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 17:52:01,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 17:52:01,645 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 17:52:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-02 17:52:01,645 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-02 17:52:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:01,645 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-02 17:52:01,645 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 17:52:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-02 17:52:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 17:52:01,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:01,645 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:01,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:01,861 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash -575645099, now seen corresponding path program 29 times [2021-05-02 17:52:01,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:01,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240998789] [2021-05-02 17:52:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:02,304 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 17:52:02,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:02,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240998789] [2021-05-02 17:52:02,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240998789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:02,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826894774] [2021-05-02 17:52:02,304 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 17:52:03,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 17:52:03,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:03,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:52:03,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:03,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:03,154 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 17:52:03,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826894774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:03,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:03,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 17:52:03,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101090653] [2021-05-02 17:52:03,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 17:52:03,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:03,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 17:52:03,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:52:03,156 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 17:52:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:03,265 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 17:52:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 17:52:03,265 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 17:52:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:03,266 INFO L225 Difference]: With dead ends: 74 [2021-05-02 17:52:03,266 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 17:52:03,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:52:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 17:52:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 17:52:03,267 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 17:52:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-02 17:52:03,268 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-02 17:52:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:03,268 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-02 17:52:03,268 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 17:52:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-02 17:52:03,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 17:52:03,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:03,268 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:03,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-02 17:52:03,485 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash -927143945, now seen corresponding path program 30 times [2021-05-02 17:52:03,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:03,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542038284] [2021-05-02 17:52:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:03,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:03,915 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 17:52:03,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:03,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542038284] [2021-05-02 17:52:03,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542038284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:03,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675746324] [2021-05-02 17:52:03,916 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 17:52:05,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 17:52:05,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:05,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 17:52:05,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:05,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:05,330 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 17:52:05,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675746324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:05,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:05,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 17:52:05,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131166562] [2021-05-02 17:52:05,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:52:05,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:05,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:52:05,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:05,332 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 17:52:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:05,445 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 17:52:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 17:52:05,445 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 17:52:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:05,446 INFO L225 Difference]: With dead ends: 76 [2021-05-02 17:52:05,446 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 17:52:05,446 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:52:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 17:52:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 17:52:05,448 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 17:52:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-02 17:52:05,448 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-02 17:52:05,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:05,448 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-02 17:52:05,448 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 17:52:05,448 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-02 17:52:05,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 17:52:05,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:05,449 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:05,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:05,665 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:05,665 INFO L82 PathProgramCache]: Analyzing trace with hash 584881433, now seen corresponding path program 31 times [2021-05-02 17:52:05,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:05,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678229971] [2021-05-02 17:52:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,095 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 17:52:06,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:06,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678229971] [2021-05-02 17:52:06,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678229971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768589238] [2021-05-02 17:52:06,096 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 17:52:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:06,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 17:52:06,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:06,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:06,269 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 17:52:06,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768589238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:06,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:06,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 17:52:06,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810620294] [2021-05-02 17:52:06,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:52:06,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:06,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:52:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:52:06,271 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 17:52:06,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:06,443 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 17:52:06,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 17:52:06,443 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 17:52:06,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:06,444 INFO L225 Difference]: With dead ends: 78 [2021-05-02 17:52:06,444 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 17:52:06,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:52:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 17:52:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 17:52:06,446 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 17:52:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-02 17:52:06,447 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-02 17:52:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:06,448 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-02 17:52:06,448 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 17:52:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-02 17:52:06,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 17:52:06,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:06,448 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:06,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 17:52:06,664 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1942323643, now seen corresponding path program 32 times [2021-05-02 17:52:06,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:06,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598630067] [2021-05-02 17:52:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:07,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:07,114 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 17:52:07,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:07,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598630067] [2021-05-02 17:52:07,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598630067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:07,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773274810] [2021-05-02 17:52:07,114 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 17:52:07,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:07,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:52:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:07,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:07,315 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 17:52:07,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773274810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:07,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:07,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 17:52:07,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822495438] [2021-05-02 17:52:07,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 17:52:07,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:07,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 17:52:07,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:07,317 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 17:52:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:07,419 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 17:52:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 17:52:07,419 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 17:52:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:07,420 INFO L225 Difference]: With dead ends: 80 [2021-05-02 17:52:07,420 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 17:52:07,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:52:07,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 17:52:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-02 17:52:07,422 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 17:52:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-02 17:52:07,422 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-02 17:52:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:07,422 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-02 17:52:07,422 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 17:52:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-02 17:52:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 17:52:07,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:07,423 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:07,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 17:52:07,639 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:07,639 INFO L82 PathProgramCache]: Analyzing trace with hash 774229469, now seen corresponding path program 33 times [2021-05-02 17:52:07,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:07,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240330100] [2021-05-02 17:52:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:08,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:08,131 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 17:52:08,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:08,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240330100] [2021-05-02 17:52:08,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240330100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:08,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39463260] [2021-05-02 17:52:08,131 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 17:52:08,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 17:52:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 17:52:08,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:08,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:08,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:09,085 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 17:52:09,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39463260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:09,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:09,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 17:52:09,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281908002] [2021-05-02 17:52:09,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 17:52:09,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:09,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 17:52:09,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:52:09,086 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 17:52:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:09,208 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 17:52:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 17:52:09,208 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 17:52:09,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:09,209 INFO L225 Difference]: With dead ends: 82 [2021-05-02 17:52:09,209 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 17:52:09,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 17:52:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 17:52:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 17:52:09,211 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 17:52:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-02 17:52:09,211 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-02 17:52:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:09,211 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-02 17:52:09,212 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 17:52:09,212 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-02 17:52:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 17:52:09,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:09,212 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:09,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 17:52:09,429 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash -777807489, now seen corresponding path program 34 times [2021-05-02 17:52:09,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:09,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462101318] [2021-05-02 17:52:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:09,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:09,932 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 17:52:09,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:09,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462101318] [2021-05-02 17:52:09,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462101318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:09,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847848779] [2021-05-02 17:52:09,932 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 17:52:09,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:09,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 17:52:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:10,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:10,133 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 17:52:10,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847848779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:10,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:10,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2021-05-02 17:52:10,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289162334] [2021-05-02 17:52:10,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 17:52:10,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:10,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 17:52:10,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:52:10,134 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 17:52:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:10,258 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 17:52:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 17:52:10,258 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 17:52:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:10,258 INFO L225 Difference]: With dead ends: 84 [2021-05-02 17:52:10,258 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 17:52:10,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:52:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 17:52:10,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-02 17:52:10,260 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 17:52:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-02 17:52:10,260 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-02 17:52:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:10,261 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-02 17:52:10,261 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 17:52:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-02 17:52:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 17:52:10,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:10,261 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:10,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 17:52:10,476 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1931672415, now seen corresponding path program 35 times [2021-05-02 17:52:10,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:10,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331520684] [2021-05-02 17:52:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:11,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:11,026 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 17:52:11,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:11,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331520684] [2021-05-02 17:52:11,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331520684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:11,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742503226] [2021-05-02 17:52:11,027 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 17:52:20,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-02 17:52:20,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:20,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 17:52:20,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:20,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:20,800 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 17:52:20,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742503226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:20,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:20,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 17:52:20,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140363899] [2021-05-02 17:52:20,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 17:52:20,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:20,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 17:52:20,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:52:20,802 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 17:52:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:20,928 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 17:52:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 17:52:20,928 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 17:52:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:20,928 INFO L225 Difference]: With dead ends: 86 [2021-05-02 17:52:20,928 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 17:52:20,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:52:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 17:52:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 17:52:20,930 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 17:52:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-02 17:52:20,930 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-02 17:52:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:20,931 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-02 17:52:20,931 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 17:52:20,931 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-02 17:52:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 17:52:20,931 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:20,931 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:21,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 17:52:21,152 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:21,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1600663363, now seen corresponding path program 36 times [2021-05-02 17:52:21,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:21,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103757056] [2021-05-02 17:52:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:21,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:21,733 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 17:52:21,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:21,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103757056] [2021-05-02 17:52:21,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103757056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:21,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116045783] [2021-05-02 17:52:21,733 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 17:52:30,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-02 17:52:30,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 17:52:30,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:30,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:30,211 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 17:52:30,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116045783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:30,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:30,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 17:52:30,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507868994] [2021-05-02 17:52:30,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 17:52:30,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:30,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 17:52:30,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:52:30,212 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 17:52:30,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:30,341 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 17:52:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:52:30,341 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 17:52:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:30,341 INFO L225 Difference]: With dead ends: 88 [2021-05-02 17:52:30,341 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 17:52:30,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:52:30,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 17:52:30,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-02 17:52:30,343 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 17:52:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-02 17:52:30,343 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-02 17:52:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:30,343 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-02 17:52:30,343 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 17:52:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-02 17:52:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 17:52:30,344 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:30,344 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:30,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 17:52:30,565 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:30,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:30,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1143785115, now seen corresponding path program 37 times [2021-05-02 17:52:30,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:30,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984354090] [2021-05-02 17:52:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:31,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:31,189 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 17:52:31,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:31,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984354090] [2021-05-02 17:52:31,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984354090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:31,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514569034] [2021-05-02 17:52:31,190 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 17:52:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:31,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 17:52:31,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:31,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:31,380 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 17:52:31,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514569034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:31,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:31,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2021-05-02 17:52:31,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66999181] [2021-05-02 17:52:31,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 17:52:31,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 17:52:31,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 17:52:31,381 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 17:52:31,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:31,481 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 17:52:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 17:52:31,481 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 17:52:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:31,482 INFO L225 Difference]: With dead ends: 90 [2021-05-02 17:52:31,482 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 17:52:31,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 586.8ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 17:52:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 17:52:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 17:52:31,484 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 17:52:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-02 17:52:31,484 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-02 17:52:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:31,484 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-02 17:52:31,484 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 17:52:31,484 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-02 17:52:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 17:52:31,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:31,485 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:31,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 17:52:31,700 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:31,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1448852729, now seen corresponding path program 38 times [2021-05-02 17:52:31,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:31,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8459832] [2021-05-02 17:52:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:32,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:32,349 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 17:52:32,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:32,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8459832] [2021-05-02 17:52:32,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8459832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:32,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743861241] [2021-05-02 17:52:32,349 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 17:52:32,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:52:32,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 17:52:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:32,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:32,544 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 17:52:32,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743861241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:32,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:32,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 17:52:32,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180510498] [2021-05-02 17:52:32,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 17:52:32,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:32,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 17:52:32,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:52:32,546 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 17:52:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:32,683 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 17:52:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 17:52:32,683 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 17:52:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:32,684 INFO L225 Difference]: With dead ends: 92 [2021-05-02 17:52:32,684 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 17:52:32,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 612.9ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:52:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 17:52:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 17:52:32,685 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 17:52:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-02 17:52:32,686 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-02 17:52:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:32,686 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-02 17:52:32,686 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 17:52:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-02 17:52:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 17:52:32,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:32,687 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:32,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 17:52:32,902 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:32,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1733913641, now seen corresponding path program 39 times [2021-05-02 17:52:32,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:32,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897478609] [2021-05-02 17:52:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:33,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:33,538 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 17:52:33,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:33,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897478609] [2021-05-02 17:52:33,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897478609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:33,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550632355] [2021-05-02 17:52:33,539 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 17:52:35,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 17:52:35,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:35,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 17:52:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:35,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:35,232 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 17:52:35,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550632355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:35,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:35,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 17:52:35,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403603285] [2021-05-02 17:52:35,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 17:52:35,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:35,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 17:52:35,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:52:35,234 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 17:52:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:35,355 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 17:52:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 17:52:35,355 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 17:52:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:35,356 INFO L225 Difference]: With dead ends: 94 [2021-05-02 17:52:35,356 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 17:52:35,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 599.1ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:52:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 17:52:35,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 17:52:35,358 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 17:52:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-02 17:52:35,359 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-02 17:52:35,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:35,359 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-02 17:52:35,359 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 17:52:35,359 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-02 17:52:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 17:52:35,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:35,360 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:35,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:35,578 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:35,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:35,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1939286837, now seen corresponding path program 40 times [2021-05-02 17:52:35,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:35,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918558638] [2021-05-02 17:52:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:36,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:36,261 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 17:52:36,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:36,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918558638] [2021-05-02 17:52:36,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918558638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:36,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698521221] [2021-05-02 17:52:36,261 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 17:52:36,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:52:36,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:36,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 17:52:36,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:36,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:36,468 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 17:52:36,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698521221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:36,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:36,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2021-05-02 17:52:36,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203298716] [2021-05-02 17:52:36,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 17:52:36,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 17:52:36,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 17:52:36,471 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 17:52:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:36,577 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 17:52:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 17:52:36,577 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 17:52:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:36,578 INFO L225 Difference]: With dead ends: 96 [2021-05-02 17:52:36,578 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 17:52:36,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 643.1ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 17:52:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 17:52:36,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-02 17:52:36,580 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 17:52:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-02 17:52:36,581 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-02 17:52:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:36,581 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-02 17:52:36,581 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 17:52:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-02 17:52:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 17:52:36,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:36,582 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:36,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:52:36,801 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1421828883, now seen corresponding path program 41 times [2021-05-02 17:52:36,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:36,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583442994] [2021-05-02 17:52:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:37,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:37,674 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 17:52:37,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:37,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583442994] [2021-05-02 17:52:37,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583442994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:37,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412361261] [2021-05-02 17:52:37,674 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 17:52:50,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 17:52:50,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:52:50,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 17:52:50,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:52:50,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:52:50,638 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 17:52:50,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412361261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:50,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:52:50,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 17:52:50,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689639882] [2021-05-02 17:52:50,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 17:52:50,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:52:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 17:52:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:52:50,640 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 17:52:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:52:50,753 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 17:52:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 17:52:50,753 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 17:52:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:52:50,754 INFO L225 Difference]: With dead ends: 98 [2021-05-02 17:52:50,754 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 17:52:50,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 762.4ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:52:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 17:52:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-02 17:52:50,755 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 17:52:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-02 17:52:50,756 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-02 17:52:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:52:50,756 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-02 17:52:50,756 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 17:52:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-02 17:52:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 17:52:50,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:52:50,756 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:52:50,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 17:52:50,976 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:52:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:52:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1934025871, now seen corresponding path program 42 times [2021-05-02 17:52:50,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:52:50,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286408137] [2021-05-02 17:52:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:52:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:51,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:52:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:52:51,751 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 17:52:51,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:52:51,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286408137] [2021-05-02 17:52:51,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286408137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:52:51,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725217584] [2021-05-02 17:52:51,751 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 17:53:09,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 17:53:09,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:09,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 17:53:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:09,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:09,845 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 17:53:09,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725217584] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:09,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:09,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 17:53:09,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518838814] [2021-05-02 17:53:09,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 17:53:09,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:09,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 17:53:09,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:53:09,846 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 17:53:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:10,010 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 17:53:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 17:53:10,011 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 17:53:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:10,011 INFO L225 Difference]: With dead ends: 100 [2021-05-02 17:53:10,011 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 17:53:10,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 664.7ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:53:10,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 17:53:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-02 17:53:10,022 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 17:53:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-02 17:53:10,023 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-02 17:53:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:10,023 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-02 17:53:10,024 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 17:53:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-02 17:53:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 17:53:10,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:10,024 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:10,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:10,241 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1390005169, now seen corresponding path program 43 times [2021-05-02 17:53:10,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:10,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645679902] [2021-05-02 17:53:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:11,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:11,040 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 17:53:11,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:11,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645679902] [2021-05-02 17:53:11,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645679902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:11,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635913626] [2021-05-02 17:53:11,041 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 17:53:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:11,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 17:53:11,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:11,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:11,271 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 17:53:11,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635913626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:11,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:11,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-02 17:53:11,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540767741] [2021-05-02 17:53:11,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 17:53:11,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:11,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 17:53:11,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 17:53:11,273 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 17:53:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:11,442 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 17:53:11,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 17:53:11,443 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 17:53:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:11,443 INFO L225 Difference]: With dead ends: 102 [2021-05-02 17:53:11,443 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 17:53:11,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 760.2ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 17:53:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 17:53:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 17:53:11,445 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 17:53:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-02 17:53:11,446 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-02 17:53:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:11,446 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-02 17:53:11,446 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 17:53:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-02 17:53:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 17:53:11,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:11,446 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:11,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:53:11,647 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:11,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1722846637, now seen corresponding path program 44 times [2021-05-02 17:53:11,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:11,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439801304] [2021-05-02 17:53:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:12,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:12,536 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 17:53:12,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:12,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439801304] [2021-05-02 17:53:12,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439801304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:12,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005150159] [2021-05-02 17:53:12,537 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 17:53:12,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:53:12,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:12,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 17:53:12,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:12,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:12,746 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 17:53:12,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005150159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:12,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:12,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 17:53:12,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49334557] [2021-05-02 17:53:12,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 17:53:12,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:12,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 17:53:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:53:12,748 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 17:53:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:12,864 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 17:53:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 17:53:12,864 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 17:53:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:12,865 INFO L225 Difference]: With dead ends: 104 [2021-05-02 17:53:12,865 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 17:53:12,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 848.7ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:53:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 17:53:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 17:53:12,867 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 17:53:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-02 17:53:12,867 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-02 17:53:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:12,867 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-02 17:53:12,867 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 17:53:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-02 17:53:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 17:53:12,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:12,868 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:13,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 17:53:13,083 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:13,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:13,083 INFO L82 PathProgramCache]: Analyzing trace with hash 418773109, now seen corresponding path program 45 times [2021-05-02 17:53:13,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:13,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190997228] [2021-05-02 17:53:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:13,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:13,896 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 17:53:13,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:13,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190997228] [2021-05-02 17:53:13,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190997228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:13,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382040906] [2021-05-02 17:53:13,897 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 17:53:15,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-02 17:53:15,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:15,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 17:53:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:16,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:16,162 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 17:53:16,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382040906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:16,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:16,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 17:53:16,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343084087] [2021-05-02 17:53:16,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 17:53:16,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:16,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 17:53:16,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:53:16,163 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 17:53:16,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:16,265 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 17:53:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 17:53:16,265 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 17:53:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:16,265 INFO L225 Difference]: With dead ends: 106 [2021-05-02 17:53:16,266 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 17:53:16,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 775.8ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 17:53:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 17:53:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 17:53:16,267 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 17:53:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-02 17:53:16,268 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-02 17:53:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:16,268 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-02 17:53:16,268 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 17:53:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-02 17:53:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 17:53:16,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:16,268 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:16,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 17:53:16,488 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:16,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1226014231, now seen corresponding path program 46 times [2021-05-02 17:53:16,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:16,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86491533] [2021-05-02 17:53:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:17,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:17,171 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 17:53:17,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:17,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86491533] [2021-05-02 17:53:17,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86491533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:17,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084456132] [2021-05-02 17:53:17,171 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 17:53:17,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:53:17,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:53:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 17:53:17,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:53:17,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:53:17,408 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 17:53:17,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084456132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:17,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:53:17,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2021-05-02 17:53:17,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008097820] [2021-05-02 17:53:17,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 17:53:17,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:53:17,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 17:53:17,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 17:53:17,409 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 17:53:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:53:17,586 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 17:53:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 17:53:17,587 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 17:53:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:53:17,587 INFO L225 Difference]: With dead ends: 108 [2021-05-02 17:53:17,587 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 17:53:17,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 642.8ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 17:53:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 17:53:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 17:53:17,589 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 17:53:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-02 17:53:17,589 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-02 17:53:17,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:53:17,589 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-02 17:53:17,589 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 17:53:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-02 17:53:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 17:53:17,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:53:17,590 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:53:17,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 17:53:17,806 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:53:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:53:17,806 INFO L82 PathProgramCache]: Analyzing trace with hash -404348103, now seen corresponding path program 47 times [2021-05-02 17:53:17,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:53:17,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370470846] [2021-05-02 17:53:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:53:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:18,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:53:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:53:18,792 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 17:53:18,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:53:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370470846] [2021-05-02 17:53:18,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370470846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:53:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79466825] [2021-05-02 17:53:18,792 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 17:54:08,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-02 17:54:08,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:54:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 17:54:08,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:54:08,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:08,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:54:09,126 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 17:54:09,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79466825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:09,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:54:09,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 17:54:09,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784241176] [2021-05-02 17:54:09,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 17:54:09,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:54:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 17:54:09,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:54:09,127 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 17:54:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:54:09,306 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 17:54:09,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 17:54:09,307 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 17:54:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:54:09,307 INFO L225 Difference]: With dead ends: 110 [2021-05-02 17:54:09,307 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 17:54:09,308 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 900.4ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:54:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 17:54:09,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 17:54:09,309 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 17:54:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-02 17:54:09,310 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-02 17:54:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:54:09,310 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-02 17:54:09,310 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 17:54:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-02 17:54:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 17:54:09,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:54:09,310 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:54:09,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:54:09,529 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:54:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:54:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 480511963, now seen corresponding path program 48 times [2021-05-02 17:54:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:54:09,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027112288] [2021-05-02 17:54:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:54:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:10,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:54:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:54:10,343 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 17:54:10,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:54:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027112288] [2021-05-02 17:54:10,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027112288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:54:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951167781] [2021-05-02 17:54:10,344 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 17:55:05,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-02 17:55:05,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:55:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 17:55:05,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:05,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:05,804 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 17:55:05,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951167781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:05,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:05,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 17:55:05,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673838273] [2021-05-02 17:55:05,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 17:55:05,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:05,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 17:55:05,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:55:05,806 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 17:55:05,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:05,943 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 17:55:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 17:55:05,944 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 17:55:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:05,944 INFO L225 Difference]: With dead ends: 112 [2021-05-02 17:55:05,944 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 17:55:05,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 774.2ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 17:55:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 17:55:05,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-02 17:55:05,946 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 17:55:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-02 17:55:05,946 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-02 17:55:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:05,946 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-02 17:55:05,946 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 17:55:05,947 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-02 17:55:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 17:55:05,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:05,947 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:06,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 17:55:06,173 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:06,173 INFO L82 PathProgramCache]: Analyzing trace with hash 427510781, now seen corresponding path program 49 times [2021-05-02 17:55:06,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:06,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100502525] [2021-05-02 17:55:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:07,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:07,129 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 17:55:07,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:07,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100502525] [2021-05-02 17:55:07,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100502525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:07,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744466097] [2021-05-02 17:55:07,129 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 17:55:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:07,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 17:55:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:07,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:07,380 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 17:55:07,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744466097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:07,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:07,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2021-05-02 17:55:07,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486366408] [2021-05-02 17:55:07,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 17:55:07,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:07,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 17:55:07,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 17:55:07,381 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 17:55:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:07,546 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 17:55:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 17:55:07,546 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 17:55:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:07,547 INFO L225 Difference]: With dead ends: 114 [2021-05-02 17:55:07,547 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 17:55:07,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 886.1ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 17:55:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 17:55:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 17:55:07,549 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 17:55:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-02 17:55:07,549 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-02 17:55:07,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:07,550 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-02 17:55:07,550 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 17:55:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-02 17:55:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 17:55:07,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:07,550 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:07,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:55:07,766 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:07,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1032982431, now seen corresponding path program 50 times [2021-05-02 17:55:07,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:07,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246507962] [2021-05-02 17:55:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:08,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:08,764 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 17:55:08,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:08,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246507962] [2021-05-02 17:55:08,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246507962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:08,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398076734] [2021-05-02 17:55:08,765 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 17:55:08,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:55:08,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:55:08,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 17:55:08,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:08,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:08,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:09,066 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 17:55:09,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398076734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:09,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:09,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 17:55:09,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130212793] [2021-05-02 17:55:09,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 17:55:09,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:09,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 17:55:09,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 17:55:09,071 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 17:55:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:09,216 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 17:55:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 17:55:09,216 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 17:55:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:09,217 INFO L225 Difference]: With dead ends: 116 [2021-05-02 17:55:09,217 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 17:55:09,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 946.4ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 17:55:09,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 17:55:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 17:55:09,219 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 17:55:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-02 17:55:09,222 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-02 17:55:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:09,222 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-02 17:55:09,222 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 17:55:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-02 17:55:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 17:55:09,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:09,223 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:09,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:55:09,437 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:09,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:09,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1224314175, now seen corresponding path program 51 times [2021-05-02 17:55:09,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:09,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916544560] [2021-05-02 17:55:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:10,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:10,620 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 17:55:10,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916544560] [2021-05-02 17:55:10,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916544560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513475123] [2021-05-02 17:55:10,620 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 17:55:16,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-02 17:55:16,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:55:16,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 17:55:16,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:16,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:16,332 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 17:55:16,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513475123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:16,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:16,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-02 17:55:16,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144353465] [2021-05-02 17:55:16,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 17:55:16,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 17:55:16,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 17:55:16,333 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 17:55:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:16,526 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 17:55:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 17:55:16,527 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 17:55:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:16,527 INFO L225 Difference]: With dead ends: 118 [2021-05-02 17:55:16,527 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 17:55:16,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1102.4ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 17:55:16,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 17:55:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-02 17:55:16,529 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 17:55:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-02 17:55:16,529 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-02 17:55:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:16,529 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-02 17:55:16,530 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 17:55:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-02 17:55:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 17:55:16,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:16,530 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:16,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 17:55:16,741 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1527868061, now seen corresponding path program 52 times [2021-05-02 17:55:16,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:16,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626510322] [2021-05-02 17:55:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:17,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:17,998 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 17:55:17,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:17,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626510322] [2021-05-02 17:55:17,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626510322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:17,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313601740] [2021-05-02 17:55:17,998 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 17:55:18,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:55:18,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:55:18,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 17:55:18,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:55:18,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:55:18,284 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 17:55:18,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313601740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:18,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:55:18,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2021-05-02 17:55:18,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555607804] [2021-05-02 17:55:18,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 17:55:18,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:55:18,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 17:55:18,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 17:55:18,286 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 17:55:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:55:18,487 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 17:55:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 17:55:18,488 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 17:55:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:55:18,488 INFO L225 Difference]: With dead ends: 120 [2021-05-02 17:55:18,488 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 17:55:18,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1168.4ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 17:55:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 17:55:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-05-02 17:55:18,490 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 17:55:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-02 17:55:18,490 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-02 17:55:18,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:55:18,490 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-02 17:55:18,490 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 17:55:18,490 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-02 17:55:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 17:55:18,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:55:18,491 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:55:18,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:55:18,708 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:55:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:55:18,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1185376379, now seen corresponding path program 53 times [2021-05-02 17:55:18,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:55:18,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206994969] [2021-05-02 17:55:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:55:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:19,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:55:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:55:19,937 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 17:55:19,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:55:19,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206994969] [2021-05-02 17:55:19,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206994969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:55:19,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241887633] [2021-05-02 17:55:19,937 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 [2021-05-02 17:58:17,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-05-02 17:58:17,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:58:17,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 17:58:17,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:58:17,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:58:17,495 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 17:58:17,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241887633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:17,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:58:17,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-05-02 17:58:17,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463379277] [2021-05-02 17:58:17,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 17:58:17,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:58:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 17:58:17,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 17:58:17,497 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:58:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:58:17,717 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 17:58:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 17:58:17,717 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-02 17:58:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:58:17,718 INFO L225 Difference]: With dead ends: 122 [2021-05-02 17:58:17,718 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 17:58:17,718 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1182.5ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 17:58:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 17:58:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-05-02 17:58:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:58:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-02 17:58:17,720 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-02 17:58:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:58:17,720 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-02 17:58:17,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 57 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:58:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-02 17:58:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 17:58:17,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:58:17,721 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:58:17,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 17:58:17,937 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:58:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:58:17,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1531615527, now seen corresponding path program 54 times [2021-05-02 17:58:17,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:58:17,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837828824] [2021-05-02 17:58:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:58:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:19,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:58:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:58:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:58:19,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:58:19,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837828824] [2021-05-02 17:58:19,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837828824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:58:19,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103184219] [2021-05-02 17:58:19,127 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:59:02,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-05-02 17:59:02,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:59:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 17:59:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:59:02,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:02,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103184219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:02,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:59:02,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2021-05-02 17:59:02,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234440049] [2021-05-02 17:59:02,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 17:59:02,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:59:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 17:59:02,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 17:59:02,979 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 2 states have call successors, (4), 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 17:59:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:59:03,106 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-02 17:59:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 17:59:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 2 states have call successors, (4), 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 120 [2021-05-02 17:59:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:59:03,107 INFO L225 Difference]: With dead ends: 124 [2021-05-02 17:59:03,107 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 17:59:03,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1140.9ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 17:59:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 17:59:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-02 17:59:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 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 17:59:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-02 17:59:03,109 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-02 17:59:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:59:03,109 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-02 17:59:03,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 58 states have internal predecessors, (120), 2 states have call successors, (4), 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 17:59:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-02 17:59:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 17:59:03,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:59:03,110 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:59:03,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 17:59:03,325 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:59:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:59:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1220721225, now seen corresponding path program 55 times [2021-05-02 17:59:03,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:59:03,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313394825] [2021-05-02 17:59:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:59:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:04,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:59:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:04,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:59:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313394825] [2021-05-02 17:59:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313394825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:04,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738292256] [2021-05-02 17:59:04,608 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:59:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:04,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 17:59:04,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:59:04,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:04,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738292256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:04,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:59:04,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 60 [2021-05-02 17:59:04,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364625390] [2021-05-02 17:59:04,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 17:59:04,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:59:04,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 17:59:04,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 17:59:04,917 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 2 states have call successors, (4), 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 17:59:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:59:05,085 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-02 17:59:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 17:59:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 2 states have call successors, (4), 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 122 [2021-05-02 17:59:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:59:05,086 INFO L225 Difference]: With dead ends: 126 [2021-05-02 17:59:05,086 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 17:59:05,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1227.0ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 17:59:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 17:59:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-02 17:59:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 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 17:59:05,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-02 17:59:05,088 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-02 17:59:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:59:05,088 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-02 17:59:05,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.033333333333333) internal successors, (122), 59 states have internal predecessors, (122), 2 states have call successors, (4), 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 17:59:05,088 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-02 17:59:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 17:59:05,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:59:05,089 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:59:05,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:59:05,297 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:59:05,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:59:05,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1195959573, now seen corresponding path program 56 times [2021-05-02 17:59:05,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:59:05,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963452293] [2021-05-02 17:59:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:59:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:06,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:59:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:06,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:59:06,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963452293] [2021-05-02 17:59:06,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963452293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:06,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581027286] [2021-05-02 17:59:06,693 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:59:06,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:59:06,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:59:06,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 17:59:06,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:59:06,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:06,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:07,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:07,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:07,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:07,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581027286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:07,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:59:07,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2021-05-02 17:59:07,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436587140] [2021-05-02 17:59:07,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 17:59:07,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:59:07,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 17:59:07,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 17:59:07,011 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 2 states have call successors, (4), 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 17:59:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:59:07,263 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-02 17:59:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 17:59:07,263 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 2 states have call successors, (4), 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 124 [2021-05-02 17:59:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:59:07,264 INFO L225 Difference]: With dead ends: 128 [2021-05-02 17:59:07,264 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 17:59:07,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1309.9ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 17:59:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 17:59:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-05-02 17:59:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 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 17:59:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-02 17:59:07,266 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-02 17:59:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:59:07,266 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-02 17:59:07,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 60 states have internal predecessors, (124), 2 states have call successors, (4), 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 17:59:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-02 17:59:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 17:59:07,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:59:07,267 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:59:07,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-02 17:59:07,481 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:59:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:59:07,481 INFO L82 PathProgramCache]: Analyzing trace with hash -48899315, now seen corresponding path program 57 times [2021-05-02 17:59:07,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:59:07,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661707537] [2021-05-02 17:59:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:59:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:08,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:59:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:08,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:59:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661707537] [2021-05-02 17:59:08,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661707537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895376445] [2021-05-02 17:59:08,891 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:59:18,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-05-02 17:59:18,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:59:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 17:59:18,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:59:18,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:18,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895376445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:18,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:59:18,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2021-05-02 17:59:18,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073927666] [2021-05-02 17:59:18,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 17:59:18,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:59:18,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 17:59:18,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 17:59:18,865 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 2 states have call successors, (4), 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 17:59:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:59:19,082 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-02 17:59:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 17:59:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 2 states have call successors, (4), 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 126 [2021-05-02 17:59:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:59:19,083 INFO L225 Difference]: With dead ends: 130 [2021-05-02 17:59:19,083 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 17:59:19,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1337.8ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 17:59:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 17:59:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-02 17:59:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 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 17:59:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-02 17:59:19,084 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-02 17:59:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:59:19,084 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-02 17:59:19,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.032258064516129) internal successors, (126), 61 states have internal predecessors, (126), 2 states have call successors, (4), 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 17:59:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-02 17:59:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 17:59:19,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:59:19,085 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:59:19,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:59:19,307 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:59:19,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:59:19,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1530586449, now seen corresponding path program 58 times [2021-05-02 17:59:19,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:59:19,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127748096] [2021-05-02 17:59:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:59:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:20,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:59:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:20,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:59:20,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127748096] [2021-05-02 17:59:20,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127748096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:20,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591830459] [2021-05-02 17:59:20,711 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:59:20,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:59:20,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:59:20,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 17:59:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:59:20,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:59:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:20,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591830459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:20,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:59:20,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 63 [2021-05-02 17:59:20,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063644475] [2021-05-02 17:59:20,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 17:59:20,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:59:20,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 17:59:20,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 17:59:20,987 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 2 states have call successors, (4), 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 17:59:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:59:21,199 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-02 17:59:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 17:59:21,200 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 2 states have call successors, (4), 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 128 [2021-05-02 17:59:21,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:59:21,201 INFO L225 Difference]: With dead ends: 132 [2021-05-02 17:59:21,201 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 17:59:21,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1357.1ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 17:59:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 17:59:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-05-02 17:59:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:59:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-02 17:59:21,202 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-02 17:59:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:59:21,202 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-02 17:59:21,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 2 states have call successors, (4), 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 17:59:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-02 17:59:21,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 17:59:21,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:59:21,214 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:59:21,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-02 17:59:21,429 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:59:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:59:21,430 INFO L82 PathProgramCache]: Analyzing trace with hash 497220049, now seen corresponding path program 59 times [2021-05-02 17:59:21,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:59:21,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214002249] [2021-05-02 17:59:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:59:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:22,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:59:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:59:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:59:22,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:59:22,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214002249] [2021-05-02 17:59:22,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214002249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:59:22,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561671888] [2021-05-02 17:59:22,895 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true