/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/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 06:31:44,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 06:31:44,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 06:31:44,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 06:31:44,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 06:31:44,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 06:31:44,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 06:31:44,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 06:31:44,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 06:31:44,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 06:31:44,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 06:31:44,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 06:31:44,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 06:31:44,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 06:31:44,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 06:31:44,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 06:31:44,099 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 06:31:44,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 06:31:44,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 06:31:44,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 06:31:44,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 06:31:44,140 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 06:31:44,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 06:31:44,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 06:31:44,143 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 06:31:44,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 06:31:44,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 06:31:44,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 06:31:44,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 06:31:44,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 06:31:44,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 06:31:44,144 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 06:31:44,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 06:31:44,144 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 06:31:44,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 06:31:44,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 06:31:44,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 06:31:44,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 06:31:44,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 06:31:44,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:31:44,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 06:31:44,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 06:31:44,146 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 06:31:44,146 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 06:31:44,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 06:31:44,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 06:31:44,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 06:31:44,451 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 06:31:44,452 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 06:31:44,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2021-05-06 06:31:44,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d01dbfc27/bf1fca8861004a1ca4d7ac10138a07aa/FLAG2b95bb2a0 [2021-05-06 06:31:45,021 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 06:31:45,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2021-05-06 06:31:45,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d01dbfc27/bf1fca8861004a1ca4d7ac10138a07aa/FLAG2b95bb2a0 [2021-05-06 06:31:45,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d01dbfc27/bf1fca8861004a1ca4d7ac10138a07aa [2021-05-06 06:31:45,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 06:31:45,517 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 06:31:45,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 06:31:45,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 06:31:45,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 06:31:45,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:31:45" (1/1) ... [2021-05-06 06:31:45,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b2c0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45, skipping insertion in model container [2021-05-06 06:31:45,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:31:45" (1/1) ... [2021-05-06 06:31:45,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 06:31:45,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 06:31:45,634 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2021-05-06 06:31:45,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:31:45,649 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 06:31:45,669 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c[318,331] [2021-05-06 06:31:45,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:31:45,710 INFO L208 MainTranslator]: Completed translation [2021-05-06 06:31:45,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45 WrapperNode [2021-05-06 06:31:45,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 06:31:45,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 06:31:45,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 06:31:45,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 06:31:45,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45" (1/1) ... [2021-05-06 06:31:45,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45" (1/1) ... [2021-05-06 06:31:45,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45" (1/1) ... [2021-05-06 06:31:45,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45" (1/1) ... [2021-05-06 06:31:45,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45" (1/1) ... [2021-05-06 06:31:45,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45" (1/1) ... [2021-05-06 06:31:45,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45" (1/1) ... [2021-05-06 06:31:45,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 06:31:45,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 06:31:45,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 06:31:45,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 06:31:45,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:31:45,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 06:31:45,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 06:31:45,808 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 06:31:45,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 06:31:45,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 06:31:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 06:31:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 06:31:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 06:31:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 06:31:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 06:31:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 06:31:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 06:31:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 06:31:45,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 06:31:45,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 06:31:45,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 06:31:45,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 06:31:46,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 06:31:46,063 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 06:31:46,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:31:46 BoogieIcfgContainer [2021-05-06 06:31:46,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 06:31:46,065 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 06:31:46,065 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 06:31:46,066 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 06:31:46,068 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:31:46" (1/1) ... [2021-05-06 06:31:46,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:31:46 BasicIcfg [2021-05-06 06:31:46,079 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 06:31:46,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 06:31:46,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 06:31:46,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 06:31:46,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 06:31:45" (1/4) ... [2021-05-06 06:31:46,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7177cc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:31:46, skipping insertion in model container [2021-05-06 06:31:46,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:31:45" (2/4) ... [2021-05-06 06:31:46,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7177cc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:31:46, skipping insertion in model container [2021-05-06 06:31:46,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:31:46" (3/4) ... [2021-05-06 06:31:46,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7177cc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:31:46, skipping insertion in model container [2021-05-06 06:31:46,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:31:46" (4/4) ... [2021-05-06 06:31:46,085 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.cJordan [2021-05-06 06:31:46,089 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 06:31:46,092 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 06:31:46,105 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 06:31:46,120 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 06:31:46,120 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 06:31:46,120 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 06:31:46,120 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 06:31:46,120 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 06:31:46,120 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 06:31:46,120 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 06:31:46,121 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 06:31:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-05-06 06:31:46,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 06:31:46,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:46,155 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:46,155 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1381876426, now seen corresponding path program 1 times [2021-05-06 06:31:46,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:46,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984986134] [2021-05-06 06:31:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:46,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:31:46,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:46,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984986134] [2021-05-06 06:31:46,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984986134] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:31:46,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:31:46,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 06:31:46,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534485368] [2021-05-06 06:31:46,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 06:31:46,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:46,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 06:31:46,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:31:46,462 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-05-06 06:31:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:46,515 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-06 06:31:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 06:31:46,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-06 06:31:46,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:46,525 INFO L225 Difference]: With dead ends: 22 [2021-05-06 06:31:46,526 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 06:31:46,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:31:46,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 06:31:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 06:31:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 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) [2021-05-06 06:31:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-05-06 06:31:46,557 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-05-06 06:31:46,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:46,558 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-05-06 06:31:46,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-05-06 06:31:46,558 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-05-06 06:31:46,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 06:31:46,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:46,559 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:46,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 06:31:46,559 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1382799947, now seen corresponding path program 1 times [2021-05-06 06:31:46,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:46,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711939057] [2021-05-06 06:31:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:46,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:31:46,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:46,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711939057] [2021-05-06 06:31:46,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711939057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:31:46,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:31:46,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 06:31:46,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644862163] [2021-05-06 06:31:46,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 06:31:46,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:46,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 06:31:46,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 06:31:46,686 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-05-06 06:31:46,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:46,775 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-05-06 06:31:46,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 06:31:46,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-05-06 06:31:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:46,777 INFO L225 Difference]: With dead ends: 17 [2021-05-06 06:31:46,777 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 06:31:46,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:31:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 06:31:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 06:31:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-05-06 06:31:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 06:31:46,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 06:31:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:46,781 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 06:31:46,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-05-06 06:31:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 06:31:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 06:31:46,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:46,781 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:46,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 06:31:46,782 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:46,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1658763799, now seen corresponding path program 1 times [2021-05-06 06:31:46,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:46,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046180505] [2021-05-06 06:31:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:46,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:31:46,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:46,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046180505] [2021-05-06 06:31:46,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046180505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:46,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048141582] [2021-05-06 06:31:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:46,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 06:31:46,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:47,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:47,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:31:47,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048141582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:47,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:47,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-06 06:31:47,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090281151] [2021-05-06 06:31:47,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 06:31:47,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:47,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 06:31:47,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 06:31:47,038 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:31:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:47,113 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 06:31:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 06:31:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 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 13 [2021-05-06 06:31:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:47,115 INFO L225 Difference]: With dead ends: 19 [2021-05-06 06:31:47,115 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 06:31:47,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 06:31:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 06:31:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 06:31:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-05-06 06:31:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 06:31:47,118 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-05-06 06:31:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:47,118 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 06:31:47,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:31:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 06:31:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 06:31:47,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:47,119 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:47,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 06:31:47,333 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:47,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:47,334 INFO L82 PathProgramCache]: Analyzing trace with hash 271204871, now seen corresponding path program 2 times [2021-05-06 06:31:47,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:47,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841100751] [2021-05-06 06:31:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:47,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 06:31:47,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:47,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841100751] [2021-05-06 06:31:47,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841100751] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:31:47,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:31:47,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 06:31:47,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413246144] [2021-05-06 06:31:47,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 06:31:47,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:47,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 06:31:47,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 06:31:47,383 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:31:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:47,431 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-05-06 06:31:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 06:31:47,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 06:31:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:47,432 INFO L225 Difference]: With dead ends: 22 [2021-05-06 06:31:47,433 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 06:31:47,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:31:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 06:31:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 06:31:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2021-05-06 06:31:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-05-06 06:31:47,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2021-05-06 06:31:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:47,436 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-05-06 06:31:47,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:31:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-05-06 06:31:47,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 06:31:47,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:47,437 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:47,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 06:31:47,438 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:47,438 INFO L82 PathProgramCache]: Analyzing trace with hash 693672383, now seen corresponding path program 1 times [2021-05-06 06:31:47,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:47,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042834644] [2021-05-06 06:31:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:47,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 06:31:47,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:47,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042834644] [2021-05-06 06:31:47,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042834644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:31:47,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:31:47,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 06:31:47,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073684249] [2021-05-06 06:31:47,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 06:31:47,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:47,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 06:31:47,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 06:31:47,491 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:31:47,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:47,577 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-05-06 06:31:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 06:31:47,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 06:31:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:47,580 INFO L225 Difference]: With dead ends: 26 [2021-05-06 06:31:47,580 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 06:31:47,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:31:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 06:31:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-05-06 06:31:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2021-05-06 06:31:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 06:31:47,589 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2021-05-06 06:31:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:47,590 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 06:31:47,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:31:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 06:31:47,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 06:31:47,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:47,595 INFO L523 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:47,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 06:31:47,596 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash 76189880, now seen corresponding path program 1 times [2021-05-06 06:31:47,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:47,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864279101] [2021-05-06 06:31:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:47,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-06 06:31:47,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:47,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864279101] [2021-05-06 06:31:47,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864279101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:47,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663573105] [2021-05-06 06:31:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 06:31:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:47,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:47,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:47,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:47,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-06 06:31:47,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663573105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:47,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:47,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-06 06:31:47,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531593303] [2021-05-06 06:31:47,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 06:31:47,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 06:31:47,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 06:31:47,863 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-05-06 06:31:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:47,975 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 06:31:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 06:31:47,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 23 [2021-05-06 06:31:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:47,977 INFO L225 Difference]: With dead ends: 26 [2021-05-06 06:31:47,977 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 06:31:47,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-06 06:31:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 06:31:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 06:31:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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) [2021-05-06 06:31:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 06:31:47,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2021-05-06 06:31:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:47,986 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 06:31:47,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-05-06 06:31:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 06:31:47,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 06:31:47,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:47,988 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:48,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:48,201 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash -531267754, now seen corresponding path program 2 times [2021-05-06 06:31:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:48,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117661871] [2021-05-06 06:31:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:48,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-06 06:31:48,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:48,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117661871] [2021-05-06 06:31:48,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117661871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:48,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732179478] [2021-05-06 06:31:48,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:48,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:31:48,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:48,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 06:31:48,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:48,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:48,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:48,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:48,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:48,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:48,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-06 06:31:48,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732179478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:48,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:48,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-06 06:31:48,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933365983] [2021-05-06 06:31:48,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 06:31:48,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 06:31:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 06:31:48,397 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2021-05-06 06:31:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:48,563 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 06:31:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 06:31:48,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 25 [2021-05-06 06:31:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:48,565 INFO L225 Difference]: With dead ends: 28 [2021-05-06 06:31:48,565 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 06:31:48,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-06 06:31:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 06:31:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 06:31:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-05-06 06:31:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 06:31:48,572 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2021-05-06 06:31:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:48,573 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 06:31:48,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2021-05-06 06:31:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 06:31:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 06:31:48,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:48,574 INFO L523 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:48,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:48,798 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:48,799 INFO L82 PathProgramCache]: Analyzing trace with hash -182501772, now seen corresponding path program 3 times [2021-05-06 06:31:48,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:48,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729155863] [2021-05-06 06:31:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:48,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-06 06:31:48,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:48,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729155863] [2021-05-06 06:31:48,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729155863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:48,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919467921] [2021-05-06 06:31:48,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:48,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 06:31:48,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:48,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 06:31:48,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:48,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:48,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:48,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:48,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-05-06 06:31:48,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919467921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:48,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:48,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-05-06 06:31:48,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596678114] [2021-05-06 06:31:48,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 06:31:48,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 06:31:48,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 06:31:48,987 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-06 06:31:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:49,225 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-06 06:31:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 06:31:49,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 27 [2021-05-06 06:31:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:49,227 INFO L225 Difference]: With dead ends: 36 [2021-05-06 06:31:49,227 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 06:31:49,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-06 06:31:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 06:31:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-05-06 06:31:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2021-05-06 06:31:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-06 06:31:49,230 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 27 [2021-05-06 06:31:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:49,230 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-06 06:31:49,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-05-06 06:31:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-06 06:31:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 06:31:49,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:49,231 INFO L523 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:49,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:49,449 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash 563037067, now seen corresponding path program 4 times [2021-05-06 06:31:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:49,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572362256] [2021-05-06 06:31:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:49,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 06:31:49,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:49,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572362256] [2021-05-06 06:31:49,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572362256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:49,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282191811] [2021-05-06 06:31:49,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:49,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:31:49,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 06:31:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:49,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:49,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:49,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:49,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:49,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:49,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:49,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:49,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:49,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:49,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 06:31:49,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282191811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:49,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:49,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-06 06:31:49,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764544312] [2021-05-06 06:31:49,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 06:31:49,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:49,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 06:31:49,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 06:31:49,701 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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) [2021-05-06 06:31:49,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:49,874 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 06:31:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 06:31:49,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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 33 [2021-05-06 06:31:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:49,875 INFO L225 Difference]: With dead ends: 36 [2021-05-06 06:31:49,876 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 06:31:49,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-06 06:31:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 06:31:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 06:31:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 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) [2021-05-06 06:31:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-05-06 06:31:49,879 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 33 [2021-05-06 06:31:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:49,879 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-05-06 06:31:49,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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) [2021-05-06 06:31:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-05-06 06:31:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 06:31:49,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:49,880 INFO L523 BasicCegarLoop]: trace histogram [9, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:50,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:50,103 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:50,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash -869333847, now seen corresponding path program 5 times [2021-05-06 06:31:50,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:50,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866488688] [2021-05-06 06:31:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:50,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 06:31:50,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866488688] [2021-05-06 06:31:50,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866488688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103778831] [2021-05-06 06:31:50,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:50,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 06:31:50,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:50,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 06:31:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:50,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:50,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:50,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:50,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:50,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:50,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 58 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-05-06 06:31:50,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103778831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:50,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:50,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-05-06 06:31:50,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210848513] [2021-05-06 06:31:50,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 06:31:50,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:50,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 06:31:50,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 06:31:50,370 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-05-06 06:31:50,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:50,733 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-05-06 06:31:50,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 06:31:50,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 35 [2021-05-06 06:31:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:50,734 INFO L225 Difference]: With dead ends: 46 [2021-05-06 06:31:50,735 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 06:31:50,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-05-06 06:31:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 06:31:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 06:31:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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) [2021-05-06 06:31:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-06 06:31:50,738 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2021-05-06 06:31:50,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:50,738 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-06 06:31:50,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-05-06 06:31:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-06 06:31:50,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 06:31:50,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:50,739 INFO L523 BasicCegarLoop]: trace histogram [12, 7, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:50,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:50,951 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1496716361, now seen corresponding path program 6 times [2021-05-06 06:31:50,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:50,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972337367] [2021-05-06 06:31:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:51,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 06:31:51,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:51,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972337367] [2021-05-06 06:31:51,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972337367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:51,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951476604] [2021-05-06 06:31:51,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:51,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-06 06:31:51,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:51,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 06:31:51,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:51,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:51,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:51,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:51,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:51,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:51,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 62 proven. 8 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-05-06 06:31:51,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951476604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:51,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:51,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2021-05-06 06:31:51,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435792190] [2021-05-06 06:31:51,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 06:31:51,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:51,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 06:31:51,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 06:31:51,220 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-05-06 06:31:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:51,632 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-06 06:31:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 06:31:51,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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 45 [2021-05-06 06:31:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:51,633 INFO L225 Difference]: With dead ends: 54 [2021-05-06 06:31:51,633 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 06:31:51,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2021-05-06 06:31:51,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 06:31:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-05-06 06:31:51,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 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) [2021-05-06 06:31:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-05-06 06:31:51,637 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 45 [2021-05-06 06:31:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:51,637 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-05-06 06:31:51,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 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) [2021-05-06 06:31:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-05-06 06:31:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 06:31:51,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:51,638 INFO L523 BasicCegarLoop]: trace histogram [14, 8, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:51,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:51,853 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash -176690226, now seen corresponding path program 7 times [2021-05-06 06:31:51,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:51,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556379613] [2021-05-06 06:31:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:51,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 06:31:51,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:51,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556379613] [2021-05-06 06:31:51,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556379613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:51,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077272925] [2021-05-06 06:31:51,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 06:31:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:52,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 06:31:52,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077272925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:52,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:52,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-06 06:31:52,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426051990] [2021-05-06 06:31:52,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 06:31:52,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:52,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 06:31:52,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 06:31:52,173 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-05-06 06:31:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:52,468 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-05-06 06:31:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 06:31:52,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 51 [2021-05-06 06:31:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:52,469 INFO L225 Difference]: With dead ends: 54 [2021-05-06 06:31:52,469 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 06:31:52,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-05-06 06:31:52,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 06:31:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 06:31:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 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) [2021-05-06 06:31:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-05-06 06:31:52,473 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 51 [2021-05-06 06:31:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:52,473 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-05-06 06:31:52,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-05-06 06:31:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-05-06 06:31:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 06:31:52,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:52,474 INFO L523 BasicCegarLoop]: trace histogram [15, 9, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:52,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 06:31:52,681 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1677779308, now seen corresponding path program 8 times [2021-05-06 06:31:52,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:52,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936798765] [2021-05-06 06:31:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:52,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 06:31:52,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:52,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936798765] [2021-05-06 06:31:52,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936798765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:52,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844796547] [2021-05-06 06:31:52,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:52,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:31:52,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 06:31:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:52,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 06:31:52,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844796547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:52,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:52,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-06 06:31:52,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10041116] [2021-05-06 06:31:52,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 06:31:52,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:52,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 06:31:52,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 06:31:52,960 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-05-06 06:31:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:53,242 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-05-06 06:31:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 06:31:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 53 [2021-05-06 06:31:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:53,243 INFO L225 Difference]: With dead ends: 56 [2021-05-06 06:31:53,243 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 06:31:53,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-05-06 06:31:53,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 06:31:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 06:31:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 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) [2021-05-06 06:31:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-05-06 06:31:53,247 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 53 [2021-05-06 06:31:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:53,247 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-05-06 06:31:53,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-05-06 06:31:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-05-06 06:31:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 06:31:53,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:53,248 INFO L523 BasicCegarLoop]: trace histogram [16, 10, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:53,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:53,453 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:53,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1411573642, now seen corresponding path program 9 times [2021-05-06 06:31:53,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:53,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959661590] [2021-05-06 06:31:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:53,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 121 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 06:31:53,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:53,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959661590] [2021-05-06 06:31:53,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959661590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:53,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935947911] [2021-05-06 06:31:53,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:53,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-06 06:31:53,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:53,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 06:31:53,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:53,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:53,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:53,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:53,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:53,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:53,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 108 proven. 18 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-05-06 06:31:53,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935947911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:53,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:53,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2021-05-06 06:31:53,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038848830] [2021-05-06 06:31:53,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 06:31:53,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 06:31:53,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 06:31:53,794 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2021-05-06 06:31:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:54,336 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-06 06:31:54,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 06:31:54,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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 55 [2021-05-06 06:31:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:54,336 INFO L225 Difference]: With dead ends: 64 [2021-05-06 06:31:54,337 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 06:31:54,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 525.7ms TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 06:31:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 06:31:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-05-06 06:31:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 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) [2021-05-06 06:31:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-05-06 06:31:54,342 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 55 [2021-05-06 06:31:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:54,342 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-05-06 06:31:54,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 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) [2021-05-06 06:31:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-05-06 06:31:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 06:31:54,343 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:54,343 INFO L523 BasicCegarLoop]: trace histogram [18, 11, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:54,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:54,561 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:54,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1771272353, now seen corresponding path program 10 times [2021-05-06 06:31:54,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:54,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941900297] [2021-05-06 06:31:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:54,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-05-06 06:31:54,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:54,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941900297] [2021-05-06 06:31:54,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941900297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:54,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572177864] [2021-05-06 06:31:54,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:54,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:31:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:54,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 06:31:54,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:54,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-05-06 06:31:54,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572177864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:54,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:54,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-06 06:31:54,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244353376] [2021-05-06 06:31:54,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 06:31:54,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:54,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 06:31:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 06:31:54,895 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-05-06 06:31:55,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:55,250 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2021-05-06 06:31:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 06:31:55,251 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 61 [2021-05-06 06:31:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:55,251 INFO L225 Difference]: With dead ends: 64 [2021-05-06 06:31:55,251 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 06:31:55,252 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-05-06 06:31:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 06:31:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 06:31:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 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) [2021-05-06 06:31:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-05-06 06:31:55,257 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 61 [2021-05-06 06:31:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:55,257 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-05-06 06:31:55,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-05-06 06:31:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-05-06 06:31:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 06:31:55,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:55,258 INFO L523 BasicCegarLoop]: trace histogram [19, 12, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:55,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 06:31:55,461 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:55,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:55,461 INFO L82 PathProgramCache]: Analyzing trace with hash 307527871, now seen corresponding path program 11 times [2021-05-06 06:31:55,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:55,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650017297] [2021-05-06 06:31:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:55,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 169 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-05-06 06:31:55,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:55,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650017297] [2021-05-06 06:31:55,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650017297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:55,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369608339] [2021-05-06 06:31:55,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:55,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-06 06:31:55,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:55,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 06:31:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:55,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 256 proven. 39 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-05-06 06:31:55,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369608339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:55,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:55,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2021-05-06 06:31:55,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472483881] [2021-05-06 06:31:55,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 06:31:55,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:55,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 06:31:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 06:31:55,866 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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) [2021-05-06 06:31:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:56,538 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2021-05-06 06:31:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 06:31:56,538 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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 63 [2021-05-06 06:31:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:56,539 INFO L225 Difference]: With dead ends: 78 [2021-05-06 06:31:56,539 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 06:31:56,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 739.1ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 06:31:56,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 06:31:56,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 06:31:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 states have internal predecessors, (88), 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) [2021-05-06 06:31:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2021-05-06 06:31:56,544 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 63 [2021-05-06 06:31:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:56,544 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2021-05-06 06:31:56,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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) [2021-05-06 06:31:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2021-05-06 06:31:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 06:31:56,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:56,545 INFO L523 BasicCegarLoop]: trace histogram [23, 13, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:56,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 06:31:56,769 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1679179387, now seen corresponding path program 12 times [2021-05-06 06:31:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:56,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949311640] [2021-05-06 06:31:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:56,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-05-06 06:31:56,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:56,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949311640] [2021-05-06 06:31:56,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949311640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:56,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522902275] [2021-05-06 06:31:56,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:57,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 06:31:57,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 06:31:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:57,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:57,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:57,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:57,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:57,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:57,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:57,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:57,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:57,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:57,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 220 proven. 32 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2021-05-06 06:31:57,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522902275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:57,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:57,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-05-06 06:31:57,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198642221] [2021-05-06 06:31:57,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 06:31:57,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:57,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 06:31:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 06:31:57,230 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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) [2021-05-06 06:31:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:57,947 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2021-05-06 06:31:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 06:31:57,947 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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 77 [2021-05-06 06:31:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:57,948 INFO L225 Difference]: With dead ends: 86 [2021-05-06 06:31:57,948 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 06:31:57,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 759.1ms TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 06:31:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 06:31:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-06 06:31:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 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) [2021-05-06 06:31:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-05-06 06:31:57,952 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 77 [2021-05-06 06:31:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:57,952 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-05-06 06:31:57,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 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) [2021-05-06 06:31:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-05-06 06:31:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 06:31:57,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:57,953 INFO L523 BasicCegarLoop]: trace histogram [25, 14, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:58,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 06:31:58,180 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:58,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:58,180 INFO L82 PathProgramCache]: Analyzing trace with hash -152030564, now seen corresponding path program 13 times [2021-05-06 06:31:58,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:58,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567925804] [2021-05-06 06:31:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:58,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 315 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-06 06:31:58,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:58,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567925804] [2021-05-06 06:31:58,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567925804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:58,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889726142] [2021-05-06 06:31:58,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 06:31:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 315 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-06 06:31:58,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889726142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:58,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:58,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-06 06:31:58,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735513422] [2021-05-06 06:31:58,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 06:31:58,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:58,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 06:31:58,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 06:31:58,545 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-05-06 06:31:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:31:59,005 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2021-05-06 06:31:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 06:31:59,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 83 [2021-05-06 06:31:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:31:59,006 INFO L225 Difference]: With dead ends: 86 [2021-05-06 06:31:59,006 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 06:31:59,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 06:31:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 06:31:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 06:31:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 81 states have internal predecessors, (98), 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) [2021-05-06 06:31:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2021-05-06 06:31:59,009 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 83 [2021-05-06 06:31:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:31:59,009 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2021-05-06 06:31:59,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-05-06 06:31:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2021-05-06 06:31:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 06:31:59,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:31:59,010 INFO L523 BasicCegarLoop]: trace histogram [26, 15, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:31:59,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:59,217 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:31:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:31:59,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1737175098, now seen corresponding path program 14 times [2021-05-06 06:31:59,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:31:59,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812681480] [2021-05-06 06:31:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:31:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:59,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:31:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:31:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-06 06:31:59,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:31:59,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812681480] [2021-05-06 06:31:59,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812681480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533252717] [2021-05-06 06:31:59,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:31:59,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:31:59,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:31:59,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 06:31:59,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:31:59,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:31:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-06 06:31:59,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533252717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:31:59,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:31:59,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-06 06:31:59,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773894697] [2021-05-06 06:31:59,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 06:31:59,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:31:59,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 06:31:59,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 06:31:59,655 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-06 06:32:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:00,127 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2021-05-06 06:32:00,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 06:32:00,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 85 [2021-05-06 06:32:00,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:00,128 INFO L225 Difference]: With dead ends: 88 [2021-05-06 06:32:00,128 INFO L226 Difference]: Without dead ends: 88 [2021-05-06 06:32:00,128 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 06:32:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-06 06:32:00,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-06 06:32:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 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) [2021-05-06 06:32:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2021-05-06 06:32:00,131 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 85 [2021-05-06 06:32:00,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:00,131 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2021-05-06 06:32:00,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-05-06 06:32:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2021-05-06 06:32:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 06:32:00,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:00,132 INFO L523 BasicCegarLoop]: trace histogram [27, 16, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:00,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:00,337 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:00,347 INFO L82 PathProgramCache]: Analyzing trace with hash 492650072, now seen corresponding path program 15 times [2021-05-06 06:32:00,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:00,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043637380] [2021-05-06 06:32:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:00,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-06 06:32:00,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:00,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043637380] [2021-05-06 06:32:00,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043637380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:00,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156009381] [2021-05-06 06:32:00,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:00,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-06 06:32:00,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:00,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 06:32:00,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:00,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 302 proven. 50 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2021-05-06 06:32:00,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156009381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:00,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:00,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-05-06 06:32:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518001148] [2021-05-06 06:32:00,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 06:32:00,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 06:32:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 06:32:00,871 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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) [2021-05-06 06:32:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:01,726 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2021-05-06 06:32:01,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 06:32:01,726 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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 87 [2021-05-06 06:32:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:01,727 INFO L225 Difference]: With dead ends: 96 [2021-05-06 06:32:01,727 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 06:32:01,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 963.6ms TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 06:32:01,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 06:32:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-05-06 06:32:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.2134831460674158) internal successors, (108), 89 states have internal predecessors, (108), 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) [2021-05-06 06:32:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2021-05-06 06:32:01,730 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 87 [2021-05-06 06:32:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:01,730 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2021-05-06 06:32:01,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 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) [2021-05-06 06:32:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2021-05-06 06:32:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 06:32:01,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:01,731 INFO L523 BasicCegarLoop]: trace histogram [29, 17, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:01,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:01,954 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:01,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:01,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1064058769, now seen corresponding path program 16 times [2021-05-06 06:32:01,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:01,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108157475] [2021-05-06 06:32:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:02,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-06 06:32:02,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:02,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108157475] [2021-05-06 06:32:02,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108157475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:02,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375908101] [2021-05-06 06:32:02,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:02,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:32:02,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:02,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 06:32:02,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:02,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-06 06:32:02,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375908101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:02,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:02,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-06 06:32:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224309432] [2021-05-06 06:32:02,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 06:32:02,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:02,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 06:32:02,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 06:32:02,401 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-05-06 06:32:03,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:03,043 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2021-05-06 06:32:03,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 06:32:03,044 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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 93 [2021-05-06 06:32:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:03,044 INFO L225 Difference]: With dead ends: 96 [2021-05-06 06:32:03,044 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 06:32:03,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 689.6ms TimeCoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 06:32:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 06:32:03,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 06:32:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 91 states have internal predecessors, (110), 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) [2021-05-06 06:32:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2021-05-06 06:32:03,047 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 93 [2021-05-06 06:32:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:03,048 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2021-05-06 06:32:03,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 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) [2021-05-06 06:32:03,048 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2021-05-06 06:32:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 06:32:03,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:03,049 INFO L523 BasicCegarLoop]: trace histogram [30, 18, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:03,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 06:32:03,257 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1568878451, now seen corresponding path program 17 times [2021-05-06 06:32:03,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:03,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175803980] [2021-05-06 06:32:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:03,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 437 proven. 342 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-05-06 06:32:03,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:03,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175803980] [2021-05-06 06:32:03,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175803980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:03,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551798586] [2021-05-06 06:32:03,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:03,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-05-06 06:32:03,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:03,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 06:32:03,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:03,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 646 proven. 126 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-05-06 06:32:03,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551798586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:03,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:03,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2021-05-06 06:32:03,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093912713] [2021-05-06 06:32:03,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 06:32:03,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:03,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 06:32:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 06:32:03,919 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 31 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) [2021-05-06 06:32:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:04,993 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2021-05-06 06:32:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 06:32:04,994 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 31 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 95 [2021-05-06 06:32:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:04,995 INFO L225 Difference]: With dead ends: 114 [2021-05-06 06:32:04,995 INFO L226 Difference]: Without dead ends: 114 [2021-05-06 06:32:04,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1284.3ms TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 06:32:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-06 06:32:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-05-06 06:32:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 109 states have internal predecessors, (132), 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) [2021-05-06 06:32:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2021-05-06 06:32:04,998 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 95 [2021-05-06 06:32:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:04,999 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2021-05-06 06:32:04,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 31 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) [2021-05-06 06:32:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2021-05-06 06:32:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 06:32:05,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:05,000 INFO L523 BasicCegarLoop]: trace histogram [35, 19, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:05,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 06:32:05,222 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:05,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:05,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1464464373, now seen corresponding path program 18 times [2021-05-06 06:32:05,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:05,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636363549] [2021-05-06 06:32:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:05,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 620 proven. 380 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-05-06 06:32:05,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:05,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636363549] [2021-05-06 06:32:05,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636363549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:05,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061604509] [2021-05-06 06:32:05,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:05,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-05-06 06:32:05,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:05,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 06:32:05,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:05,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 500 proven. 72 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2021-05-06 06:32:05,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061604509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:05,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:05,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 30 [2021-05-06 06:32:05,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273585164] [2021-05-06 06:32:05,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 06:32:05,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:05,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 06:32:05,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 06:32:05,870 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 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) [2021-05-06 06:32:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:06,834 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2021-05-06 06:32:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 06:32:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 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 113 [2021-05-06 06:32:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:06,835 INFO L225 Difference]: With dead ends: 122 [2021-05-06 06:32:06,835 INFO L226 Difference]: Without dead ends: 122 [2021-05-06 06:32:06,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1097.3ms TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 06:32:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-06 06:32:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-05-06 06:32:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.2173913043478262) internal successors, (140), 115 states have internal predecessors, (140), 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) [2021-05-06 06:32:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2021-05-06 06:32:06,839 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 113 [2021-05-06 06:32:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:06,839 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2021-05-06 06:32:06,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 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) [2021-05-06 06:32:06,840 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2021-05-06 06:32:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-06 06:32:06,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:06,841 INFO L523 BasicCegarLoop]: trace histogram [37, 20, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:07,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 06:32:07,041 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:07,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1366299426, now seen corresponding path program 19 times [2021-05-06 06:32:07,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:07,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576518908] [2021-05-06 06:32:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:07,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-06 06:32:07,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:07,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576518908] [2021-05-06 06:32:07,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576518908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:07,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060161969] [2021-05-06 06:32:07,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 06:32:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:07,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 693 proven. 420 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-06 06:32:07,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060161969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:07,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:07,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-06 06:32:07,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159632640] [2021-05-06 06:32:07,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 06:32:07,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:07,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 06:32:07,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 06:32:07,538 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2021-05-06 06:32:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:08,187 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2021-05-06 06:32:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 06:32:08,188 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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 119 [2021-05-06 06:32:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:08,188 INFO L225 Difference]: With dead ends: 122 [2021-05-06 06:32:08,188 INFO L226 Difference]: Without dead ends: 122 [2021-05-06 06:32:08,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 737.1ms TimeCoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 06:32:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-06 06:32:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-05-06 06:32:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 117 states have internal predecessors, (142), 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) [2021-05-06 06:32:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2021-05-06 06:32:08,192 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 119 [2021-05-06 06:32:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:08,192 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2021-05-06 06:32:08,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2021-05-06 06:32:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2021-05-06 06:32:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-06 06:32:08,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:08,193 INFO L523 BasicCegarLoop]: trace histogram [38, 21, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:08,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 06:32:08,397 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:08,398 INFO L82 PathProgramCache]: Analyzing trace with hash -89843264, now seen corresponding path program 20 times [2021-05-06 06:32:08,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:08,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002508423] [2021-05-06 06:32:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:08,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 726 proven. 462 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-06 06:32:08,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:08,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002508423] [2021-05-06 06:32:08,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002508423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:08,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403597050] [2021-05-06 06:32:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:08,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:32:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 06:32:08,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:08,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 726 proven. 462 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-06 06:32:08,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403597050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:08,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:08,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-06 06:32:08,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324520663] [2021-05-06 06:32:08,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 06:32:08,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:08,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 06:32:08,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 06:32:08,909 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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) [2021-05-06 06:32:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:09,619 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2021-05-06 06:32:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 06:32:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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 121 [2021-05-06 06:32:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:09,620 INFO L225 Difference]: With dead ends: 124 [2021-05-06 06:32:09,620 INFO L226 Difference]: Without dead ends: 124 [2021-05-06 06:32:09,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 811.2ms TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 06:32:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-06 06:32:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-05-06 06:32:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 119 states have internal predecessors, (144), 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) [2021-05-06 06:32:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2021-05-06 06:32:09,623 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 121 [2021-05-06 06:32:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:09,624 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2021-05-06 06:32:09,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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) [2021-05-06 06:32:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2021-05-06 06:32:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 06:32:09,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:09,625 INFO L523 BasicCegarLoop]: trace histogram [39, 22, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:09,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 06:32:09,841 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:09,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:09,841 INFO L82 PathProgramCache]: Analyzing trace with hash 716370142, now seen corresponding path program 21 times [2021-05-06 06:32:09,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:09,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501866391] [2021-05-06 06:32:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:10,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 759 proven. 506 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-05-06 06:32:10,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:10,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501866391] [2021-05-06 06:32:10,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501866391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:10,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357636704] [2021-05-06 06:32:10,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:10,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 06:32:10,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:10,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 06:32:10,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:10,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 622 proven. 98 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2021-05-06 06:32:10,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357636704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:10,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:10,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2021-05-06 06:32:10,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999404190] [2021-05-06 06:32:10,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 06:32:10,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:10,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 06:32:10,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 06:32:10,527 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 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) [2021-05-06 06:32:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:11,612 INFO L93 Difference]: Finished difference Result 132 states and 160 transitions. [2021-05-06 06:32:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 06:32:11,612 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 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 123 [2021-05-06 06:32:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:11,613 INFO L225 Difference]: With dead ends: 132 [2021-05-06 06:32:11,613 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 06:32:11,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1339.0ms TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 06:32:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 06:32:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-05-06 06:32:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.216) internal successors, (152), 125 states have internal predecessors, (152), 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) [2021-05-06 06:32:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 156 transitions. [2021-05-06 06:32:11,616 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 156 transitions. Word has length 123 [2021-05-06 06:32:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:11,616 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 156 transitions. [2021-05-06 06:32:11,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 33 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) [2021-05-06 06:32:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 156 transitions. [2021-05-06 06:32:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 06:32:11,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:11,617 INFO L523 BasicCegarLoop]: trace histogram [41, 23, 18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:11,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:11,829 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:11,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1436666101, now seen corresponding path program 22 times [2021-05-06 06:32:11,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:11,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569700860] [2021-05-06 06:32:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:12,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 840 proven. 552 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-06 06:32:12,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:12,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569700860] [2021-05-06 06:32:12,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569700860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:12,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896522336] [2021-05-06 06:32:12,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:12,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:32:12,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:12,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 06:32:12,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:12,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1987 backedges. 840 proven. 552 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-06 06:32:12,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896522336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:12,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:12,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-06 06:32:12,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584587297] [2021-05-06 06:32:12,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 06:32:12,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:12,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 06:32:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 06:32:12,397 INFO L87 Difference]: Start difference. First operand 130 states and 156 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-05-06 06:32:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:13,176 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2021-05-06 06:32:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 06:32:13,177 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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 129 [2021-05-06 06:32:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:13,177 INFO L225 Difference]: With dead ends: 132 [2021-05-06 06:32:13,177 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 06:32:13,178 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 885.3ms TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 06:32:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 06:32:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-05-06 06:32:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.2125984251968505) internal successors, (154), 127 states have internal predecessors, (154), 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) [2021-05-06 06:32:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2021-05-06 06:32:13,181 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 129 [2021-05-06 06:32:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:13,181 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2021-05-06 06:32:13,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-05-06 06:32:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2021-05-06 06:32:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 06:32:13,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:13,182 INFO L523 BasicCegarLoop]: trace histogram [42, 24, 18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:13,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 06:32:13,397 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:13,397 INFO L82 PathProgramCache]: Analyzing trace with hash 32350739, now seen corresponding path program 23 times [2021-05-06 06:32:13,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:13,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520074914] [2021-05-06 06:32:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:13,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 875 proven. 600 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2021-05-06 06:32:13,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:13,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520074914] [2021-05-06 06:32:13,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520074914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:13,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813707373] [2021-05-06 06:32:13,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:13,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-05-06 06:32:13,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:13,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 06:32:13,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:13,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:13,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 1254 proven. 256 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2021-05-06 06:32:14,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813707373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:14,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:14,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 15] total 41 [2021-05-06 06:32:14,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927701946] [2021-05-06 06:32:14,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 06:32:14,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:14,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 06:32:14,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 06:32:14,339 INFO L87 Difference]: Start difference. First operand 132 states and 158 transitions. Second operand has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 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) [2021-05-06 06:32:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:15,850 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2021-05-06 06:32:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 06:32:15,851 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 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 131 [2021-05-06 06:32:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:15,851 INFO L225 Difference]: With dead ends: 146 [2021-05-06 06:32:15,852 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 06:32:15,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1877.6ms TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 06:32:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 06:32:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-06 06:32:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 141 states have internal predecessors, (171), 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) [2021-05-06 06:32:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2021-05-06 06:32:15,855 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 131 [2021-05-06 06:32:15,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:15,856 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2021-05-06 06:32:15,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 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) [2021-05-06 06:32:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2021-05-06 06:32:15,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-05-06 06:32:15,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:15,857 INFO L523 BasicCegarLoop]: trace histogram [46, 25, 21, 21, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:16,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:16,065 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:16,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1253082151, now seen corresponding path program 24 times [2021-05-06 06:32:16,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:16,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499712287] [2021-05-06 06:32:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:16,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 1066 proven. 650 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2021-05-06 06:32:16,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:16,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499712287] [2021-05-06 06:32:16,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499712287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:16,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698075819] [2021-05-06 06:32:16,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:16,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-05-06 06:32:16,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:16,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 06:32:16,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:16,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2536 backedges. 858 proven. 128 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2021-05-06 06:32:16,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698075819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:16,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:16,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2021-05-06 06:32:16,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193284807] [2021-05-06 06:32:16,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 06:32:16,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 06:32:16,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 06:32:16,870 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 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) [2021-05-06 06:32:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:18,223 INFO L93 Difference]: Finished difference Result 154 states and 187 transitions. [2021-05-06 06:32:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 06:32:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 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 145 [2021-05-06 06:32:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:18,224 INFO L225 Difference]: With dead ends: 154 [2021-05-06 06:32:18,224 INFO L226 Difference]: Without dead ends: 154 [2021-05-06 06:32:18,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1626.8ms TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 06:32:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-06 06:32:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-06 06:32:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.217687074829932) internal successors, (179), 147 states have internal predecessors, (179), 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) [2021-05-06 06:32:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 183 transitions. [2021-05-06 06:32:18,228 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 183 transitions. Word has length 145 [2021-05-06 06:32:18,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:18,229 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 183 transitions. [2021-05-06 06:32:18,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 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) [2021-05-06 06:32:18,229 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 183 transitions. [2021-05-06 06:32:18,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 06:32:18,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:18,230 INFO L523 BasicCegarLoop]: trace histogram [48, 26, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:18,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 06:32:18,438 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:18,438 INFO L82 PathProgramCache]: Analyzing trace with hash -763300880, now seen corresponding path program 25 times [2021-05-06 06:32:18,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:18,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560102007] [2021-05-06 06:32:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:18,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2766 backedges. 1161 proven. 702 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-06 06:32:18,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:18,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560102007] [2021-05-06 06:32:18,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560102007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:18,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265904590] [2021-05-06 06:32:18,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:18,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 06:32:18,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:18,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:18,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2766 backedges. 1161 proven. 702 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-06 06:32:19,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265904590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:19,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:19,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-06 06:32:19,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346451468] [2021-05-06 06:32:19,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 06:32:19,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:19,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 06:32:19,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 06:32:19,124 INFO L87 Difference]: Start difference. First operand 152 states and 183 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-05-06 06:32:20,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:20,059 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-05-06 06:32:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 06:32:20,059 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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 151 [2021-05-06 06:32:20,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:20,060 INFO L225 Difference]: With dead ends: 154 [2021-05-06 06:32:20,060 INFO L226 Difference]: Without dead ends: 154 [2021-05-06 06:32:20,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1076.9ms TimeCoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 06:32:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-06 06:32:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-06 06:32:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.2147651006711409) internal successors, (181), 149 states have internal predecessors, (181), 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) [2021-05-06 06:32:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-06 06:32:20,063 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 151 [2021-05-06 06:32:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:20,064 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-06 06:32:20,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 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) [2021-05-06 06:32:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-06 06:32:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-06 06:32:20,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:20,065 INFO L523 BasicCegarLoop]: trace histogram [49, 27, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:20,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:20,269 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:20,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash 558105230, now seen corresponding path program 26 times [2021-05-06 06:32:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:20,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800929568] [2021-05-06 06:32:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:20,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2863 backedges. 1204 proven. 756 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-06 06:32:20,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:20,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800929568] [2021-05-06 06:32:20,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800929568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:20,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38544801] [2021-05-06 06:32:20,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:20,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:32:20,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 06:32:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:20,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2863 backedges. 1204 proven. 756 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-06 06:32:20,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38544801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:20,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:20,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-06 06:32:20,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508159270] [2021-05-06 06:32:20,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 06:32:20,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:20,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 06:32:20,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 06:32:20,971 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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) [2021-05-06 06:32:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:21,855 INFO L93 Difference]: Finished difference Result 156 states and 187 transitions. [2021-05-06 06:32:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 06:32:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 153 [2021-05-06 06:32:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:21,856 INFO L225 Difference]: With dead ends: 156 [2021-05-06 06:32:21,856 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 06:32:21,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1155.4ms TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 06:32:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 06:32:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-05-06 06:32:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.2119205298013245) internal successors, (183), 151 states have internal predecessors, (183), 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) [2021-05-06 06:32:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 187 transitions. [2021-05-06 06:32:21,859 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 187 transitions. Word has length 153 [2021-05-06 06:32:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:21,860 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 187 transitions. [2021-05-06 06:32:21,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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) [2021-05-06 06:32:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 187 transitions. [2021-05-06 06:32:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-06 06:32:21,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:21,861 INFO L523 BasicCegarLoop]: trace histogram [50, 28, 22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:22,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-06 06:32:22,069 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:22,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:22,069 INFO L82 PathProgramCache]: Analyzing trace with hash -880942676, now seen corresponding path program 27 times [2021-05-06 06:32:22,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:22,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872185468] [2021-05-06 06:32:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:22,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2962 backedges. 1247 proven. 812 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-05-06 06:32:22,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:22,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872185468] [2021-05-06 06:32:22,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872185468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:22,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448131724] [2021-05-06 06:32:22,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:22,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-05-06 06:32:22,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:22,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 06:32:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:22,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:22,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:23,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:23,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2962 backedges. 1016 proven. 162 refuted. 0 times theorem prover too weak. 1784 trivial. 0 not checked. [2021-05-06 06:32:23,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448131724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:23,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:23,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2021-05-06 06:32:23,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037274848] [2021-05-06 06:32:23,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 06:32:23,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:23,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 06:32:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 06:32:23,058 INFO L87 Difference]: Start difference. First operand 156 states and 187 transitions. Second operand has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 41 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) [2021-05-06 06:32:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:24,664 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2021-05-06 06:32:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 06:32:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 41 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 155 [2021-05-06 06:32:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:24,665 INFO L225 Difference]: With dead ends: 164 [2021-05-06 06:32:24,665 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 06:32:24,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 2013.6ms TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 06:32:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 06:32:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-05-06 06:32:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.21656050955414) internal successors, (191), 157 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 195 transitions. [2021-05-06 06:32:24,668 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 195 transitions. Word has length 155 [2021-05-06 06:32:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:24,669 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 195 transitions. [2021-05-06 06:32:24,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.761904761904762) internal successors, (116), 41 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) [2021-05-06 06:32:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 195 transitions. [2021-05-06 06:32:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-05-06 06:32:24,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:24,670 INFO L523 BasicCegarLoop]: trace histogram [52, 29, 23, 23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:24,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:24,885 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:24,885 INFO L82 PathProgramCache]: Analyzing trace with hash 500280003, now seen corresponding path program 28 times [2021-05-06 06:32:24,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:24,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735841425] [2021-05-06 06:32:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:25,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 1350 proven. 870 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-05-06 06:32:25,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:25,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735841425] [2021-05-06 06:32:25,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735841425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:25,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030502946] [2021-05-06 06:32:25,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:25,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:32:25,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:25,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 06:32:25,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:25,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 1350 proven. 870 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-05-06 06:32:25,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030502946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:25,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:25,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-06 06:32:25,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684344596] [2021-05-06 06:32:25,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 06:32:25,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:25,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 06:32:25,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 06:32:25,668 INFO L87 Difference]: Start difference. First operand 162 states and 195 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-05-06 06:32:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:26,818 INFO L93 Difference]: Finished difference Result 164 states and 197 transitions. [2021-05-06 06:32:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 06:32:26,818 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2021-05-06 06:32:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:26,819 INFO L225 Difference]: With dead ends: 164 [2021-05-06 06:32:26,819 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 06:32:26,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1368.9ms TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 06:32:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 06:32:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-06 06:32:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.2138364779874213) internal successors, (193), 159 states have internal predecessors, (193), 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) [2021-05-06 06:32:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2021-05-06 06:32:26,822 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 161 [2021-05-06 06:32:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:26,823 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2021-05-06 06:32:26,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-05-06 06:32:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2021-05-06 06:32:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-06 06:32:26,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:26,824 INFO L523 BasicCegarLoop]: trace histogram [53, 30, 23, 23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:27,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 06:32:27,024 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2076281825, now seen corresponding path program 29 times [2021-05-06 06:32:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:27,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216115925] [2021-05-06 06:32:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:27,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 1395 proven. 930 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2021-05-06 06:32:27,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:27,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216115925] [2021-05-06 06:32:27,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216115925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:27,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899593914] [2021-05-06 06:32:27,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:27,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-05-06 06:32:27,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:27,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 06:32:27,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:27,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:27,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 2010 proven. 441 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2021-05-06 06:32:28,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899593914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:28,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:28,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 19] total 51 [2021-05-06 06:32:28,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036076487] [2021-05-06 06:32:28,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-06 06:32:28,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:28,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-06 06:32:28,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 06:32:28,272 INFO L87 Difference]: Start difference. First operand 164 states and 197 transitions. Second operand has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 50 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:30,374 INFO L93 Difference]: Finished difference Result 182 states and 219 transitions. [2021-05-06 06:32:30,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-06 06:32:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 50 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-05-06 06:32:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:30,375 INFO L225 Difference]: With dead ends: 182 [2021-05-06 06:32:30,375 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 06:32:30,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 2733.8ms TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2021-05-06 06:32:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 06:32:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-06 06:32:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2146892655367232) internal successors, (215), 177 states have internal predecessors, (215), 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) [2021-05-06 06:32:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 219 transitions. [2021-05-06 06:32:30,379 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 219 transitions. Word has length 163 [2021-05-06 06:32:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:30,379 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 219 transitions. [2021-05-06 06:32:30,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 50 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 219 transitions. [2021-05-06 06:32:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-05-06 06:32:30,380 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:30,380 INFO L523 BasicCegarLoop]: trace histogram [58, 31, 27, 27, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:30,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:30,589 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash 506116191, now seen corresponding path program 30 times [2021-05-06 06:32:30,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:30,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058286107] [2021-05-06 06:32:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:31,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4066 backedges. 1696 proven. 992 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2021-05-06 06:32:31,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:31,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058286107] [2021-05-06 06:32:31,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058286107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:31,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124051987] [2021-05-06 06:32:31,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:31,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-06 06:32:31,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 06:32:31,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:31,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4066 backedges. 1354 proven. 200 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2021-05-06 06:32:31,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124051987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:31,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:31,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 13] total 46 [2021-05-06 06:32:31,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849434918] [2021-05-06 06:32:31,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 06:32:31,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 06:32:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 06:32:31,764 INFO L87 Difference]: Start difference. First operand 182 states and 219 transitions. Second operand has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 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) [2021-05-06 06:32:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:33,518 INFO L93 Difference]: Finished difference Result 190 states and 231 transitions. [2021-05-06 06:32:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 06:32:33,519 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 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 181 [2021-05-06 06:32:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:33,519 INFO L225 Difference]: With dead ends: 190 [2021-05-06 06:32:33,519 INFO L226 Difference]: Without dead ends: 190 [2021-05-06 06:32:33,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2277.8ms TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 06:32:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-06 06:32:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2021-05-06 06:32:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.2185792349726776) internal successors, (223), 183 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 227 transitions. [2021-05-06 06:32:33,523 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 227 transitions. Word has length 181 [2021-05-06 06:32:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:33,523 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 227 transitions. [2021-05-06 06:32:33,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.739130434782609) internal successors, (126), 45 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) [2021-05-06 06:32:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 227 transitions. [2021-05-06 06:32:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-05-06 06:32:33,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:33,524 INFO L523 BasicCegarLoop]: trace histogram [60, 32, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:33,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 06:32:33,741 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:33,741 INFO L82 PathProgramCache]: Analyzing trace with hash 573720182, now seen corresponding path program 31 times [2021-05-06 06:32:33,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:33,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857179744] [2021-05-06 06:32:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:34,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1815 proven. 1056 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-06 06:32:34,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:34,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857179744] [2021-05-06 06:32:34,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857179744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:34,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394949183] [2021-05-06 06:32:34,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 06:32:34,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:34,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1815 proven. 1056 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-06 06:32:34,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394949183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:34,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:34,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-06 06:32:34,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339911984] [2021-05-06 06:32:34,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 06:32:34,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 06:32:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 06:32:34,611 INFO L87 Difference]: Start difference. First operand 188 states and 227 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 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) [2021-05-06 06:32:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:35,860 INFO L93 Difference]: Finished difference Result 190 states and 229 transitions. [2021-05-06 06:32:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 06:32:35,860 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 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 187 [2021-05-06 06:32:35,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:35,863 INFO L225 Difference]: With dead ends: 190 [2021-05-06 06:32:35,863 INFO L226 Difference]: Without dead ends: 190 [2021-05-06 06:32:35,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1489.0ms TimeCoverageRelationStatistics Valid=1821, Invalid=3009, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 06:32:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-06 06:32:35,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-05-06 06:32:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.2162162162162162) internal successors, (225), 185 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 229 transitions. [2021-05-06 06:32:35,867 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 229 transitions. Word has length 187 [2021-05-06 06:32:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:35,867 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 229 transitions. [2021-05-06 06:32:35,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 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) [2021-05-06 06:32:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 229 transitions. [2021-05-06 06:32:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-06 06:32:35,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:35,869 INFO L523 BasicCegarLoop]: trace histogram [61, 33, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:36,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 06:32:36,085 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash -627384812, now seen corresponding path program 32 times [2021-05-06 06:32:36,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:36,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736430643] [2021-05-06 06:32:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:36,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4477 backedges. 1870 proven. 1122 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-06 06:32:36,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:36,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736430643] [2021-05-06 06:32:36,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736430643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:36,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114512090] [2021-05-06 06:32:36,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:36,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:32:36,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 06:32:36,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:36,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4477 backedges. 1870 proven. 1122 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-06 06:32:36,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114512090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:36,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:36,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-06 06:32:36,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352621407] [2021-05-06 06:32:36,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 06:32:36,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:36,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 06:32:36,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 06:32:36,971 INFO L87 Difference]: Start difference. First operand 190 states and 229 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 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) [2021-05-06 06:32:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:38,231 INFO L93 Difference]: Finished difference Result 192 states and 231 transitions. [2021-05-06 06:32:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 06:32:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 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 189 [2021-05-06 06:32:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:38,232 INFO L225 Difference]: With dead ends: 192 [2021-05-06 06:32:38,232 INFO L226 Difference]: Without dead ends: 192 [2021-05-06 06:32:38,233 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1540.3ms TimeCoverageRelationStatistics Valid=1927, Invalid=3185, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 06:32:38,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-06 06:32:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-05-06 06:32:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.213903743315508) internal successors, (227), 187 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 231 transitions. [2021-05-06 06:32:38,236 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 231 transitions. Word has length 189 [2021-05-06 06:32:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:38,236 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 231 transitions. [2021-05-06 06:32:38,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 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) [2021-05-06 06:32:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 231 transitions. [2021-05-06 06:32:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-06 06:32:38,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:38,237 INFO L523 BasicCegarLoop]: trace histogram [62, 34, 28, 28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:38,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 06:32:38,461 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:38,461 INFO L82 PathProgramCache]: Analyzing trace with hash 456918578, now seen corresponding path program 33 times [2021-05-06 06:32:38,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:38,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155779696] [2021-05-06 06:32:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:39,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4600 backedges. 1925 proven. 1190 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2021-05-06 06:32:39,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:39,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155779696] [2021-05-06 06:32:39,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155779696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:39,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242023167] [2021-05-06 06:32:39,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:39,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-05-06 06:32:39,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:39,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 06:32:39,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:39,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4600 backedges. 1552 proven. 242 refuted. 0 times theorem prover too weak. 2806 trivial. 0 not checked. [2021-05-06 06:32:39,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242023167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:39,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:39,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2021-05-06 06:32:39,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442219531] [2021-05-06 06:32:39,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 06:32:39,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:39,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 06:32:39,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 06:32:39,801 INFO L87 Difference]: Start difference. First operand 192 states and 231 transitions. Second operand has 50 states, 50 states have (on average 2.72) internal successors, (136), 49 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:41,951 INFO L93 Difference]: Finished difference Result 200 states and 243 transitions. [2021-05-06 06:32:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 06:32:41,952 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 49 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2021-05-06 06:32:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:41,952 INFO L225 Difference]: With dead ends: 200 [2021-05-06 06:32:41,952 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 06:32:41,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2803.6ms TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 06:32:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 06:32:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2021-05-06 06:32:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.217616580310881) internal successors, (235), 193 states have internal predecessors, (235), 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) [2021-05-06 06:32:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2021-05-06 06:32:41,956 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 191 [2021-05-06 06:32:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:41,956 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2021-05-06 06:32:41,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 49 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2021-05-06 06:32:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-06 06:32:41,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:41,957 INFO L523 BasicCegarLoop]: trace histogram [64, 35, 29, 29, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:42,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 06:32:42,180 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:42,181 INFO L82 PathProgramCache]: Analyzing trace with hash -179657399, now seen corresponding path program 34 times [2021-05-06 06:32:42,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:42,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289739875] [2021-05-06 06:32:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:42,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4908 backedges. 2052 proven. 1260 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-05-06 06:32:42,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:42,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289739875] [2021-05-06 06:32:42,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289739875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:42,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559577654] [2021-05-06 06:32:42,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:42,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:32:42,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 06:32:42,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:42,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:42,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:43,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:43,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:43,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:43,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:43,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:43,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:43,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:43,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4908 backedges. 2052 proven. 1260 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-05-06 06:32:43,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559577654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:43,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:43,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-06 06:32:43,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946698493] [2021-05-06 06:32:43,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 06:32:43,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:43,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 06:32:43,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 06:32:43,111 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 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) [2021-05-06 06:32:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:44,401 INFO L93 Difference]: Finished difference Result 200 states and 241 transitions. [2021-05-06 06:32:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 06:32:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 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 197 [2021-05-06 06:32:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:44,402 INFO L225 Difference]: With dead ends: 200 [2021-05-06 06:32:44,402 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 06:32:44,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1693.1ms TimeCoverageRelationStatistics Valid=2148, Invalid=3552, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 06:32:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 06:32:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-06 06:32:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2153846153846153) internal successors, (237), 195 states have internal predecessors, (237), 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) [2021-05-06 06:32:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2021-05-06 06:32:44,405 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 197 [2021-05-06 06:32:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:44,406 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2021-05-06 06:32:44,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.2) internal successors, (88), 39 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) [2021-05-06 06:32:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2021-05-06 06:32:44,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-06 06:32:44,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:44,407 INFO L523 BasicCegarLoop]: trace histogram [65, 36, 29, 29, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:44,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 06:32:44,621 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash 373870439, now seen corresponding path program 35 times [2021-05-06 06:32:44,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:44,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787009893] [2021-05-06 06:32:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:45,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 2109 proven. 1332 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-05-06 06:32:45,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:45,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787009893] [2021-05-06 06:32:45,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787009893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:45,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997286140] [2021-05-06 06:32:45,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:45,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-05-06 06:32:45,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:45,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 06:32:45,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:45,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:45,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5037 backedges. 3030 proven. 709 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2021-05-06 06:32:46,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997286140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:46,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:46,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 23] total 61 [2021-05-06 06:32:46,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325280375] [2021-05-06 06:32:46,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-06 06:32:46,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-06 06:32:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 06:32:46,448 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand has 61 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 60 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:49,366 INFO L93 Difference]: Finished difference Result 218 states and 263 transitions. [2021-05-06 06:32:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-06 06:32:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 60 states have internal predecessors, (168), 2 states have call successors, (4), 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 199 [2021-05-06 06:32:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:49,367 INFO L225 Difference]: With dead ends: 218 [2021-05-06 06:32:49,367 INFO L226 Difference]: Without dead ends: 218 [2021-05-06 06:32:49,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3941.6ms TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2021-05-06 06:32:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-06 06:32:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-05-06 06:32:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.215962441314554) internal successors, (259), 213 states have internal predecessors, (259), 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) [2021-05-06 06:32:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 263 transitions. [2021-05-06 06:32:49,372 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 263 transitions. Word has length 199 [2021-05-06 06:32:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:49,372 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 263 transitions. [2021-05-06 06:32:49,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 60 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 263 transitions. [2021-05-06 06:32:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-05-06 06:32:49,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:49,373 INFO L523 BasicCegarLoop]: trace histogram [70, 37, 33, 33, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:49,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 06:32:49,589 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:49,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:49,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1406696677, now seen corresponding path program 36 times [2021-05-06 06:32:49,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:49,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98164766] [2021-05-06 06:32:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:50,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 2470 proven. 1406 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2021-05-06 06:32:50,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:50,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98164766] [2021-05-06 06:32:50,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98164766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:50,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341745635] [2021-05-06 06:32:50,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:50,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2021-05-06 06:32:50,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:50,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 06:32:50,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:50,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:50,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:51,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:51,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 1962 proven. 288 refuted. 0 times theorem prover too weak. 3706 trivial. 0 not checked. [2021-05-06 06:32:51,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341745635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:51,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:51,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 15] total 54 [2021-05-06 06:32:51,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890577539] [2021-05-06 06:32:51,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 06:32:51,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 06:32:51,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 06:32:51,102 INFO L87 Difference]: Start difference. First operand 218 states and 263 transitions. Second operand has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 53 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:53,384 INFO L93 Difference]: Finished difference Result 226 states and 275 transitions. [2021-05-06 06:32:53,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 06:32:53,384 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 53 states have internal predecessors, (146), 2 states have call successors, (4), 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 217 [2021-05-06 06:32:53,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:53,385 INFO L225 Difference]: With dead ends: 226 [2021-05-06 06:32:53,385 INFO L226 Difference]: Without dead ends: 226 [2021-05-06 06:32:53,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 2998.9ms TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2021-05-06 06:32:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-06 06:32:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2021-05-06 06:32:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2191780821917808) internal successors, (267), 219 states have internal predecessors, (267), 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) [2021-05-06 06:32:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 271 transitions. [2021-05-06 06:32:53,389 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 271 transitions. Word has length 217 [2021-05-06 06:32:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:53,389 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 271 transitions. [2021-05-06 06:32:53,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 53 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:32:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 271 transitions. [2021-05-06 06:32:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-05-06 06:32:53,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:53,390 INFO L523 BasicCegarLoop]: trace histogram [72, 38, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:53,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-06 06:32:53,613 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:53,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:53,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1237426428, now seen corresponding path program 37 times [2021-05-06 06:32:53,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:53,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381346439] [2021-05-06 06:32:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:54,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6306 backedges. 2613 proven. 1482 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-06 06:32:54,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:54,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381346439] [2021-05-06 06:32:54,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381346439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:54,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242671624] [2021-05-06 06:32:54,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:54,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 06:32:54,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:54,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6306 backedges. 2613 proven. 1482 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-06 06:32:54,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242671624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:54,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:54,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-06 06:32:54,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197871274] [2021-05-06 06:32:54,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 06:32:54,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:54,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 06:32:54,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 06:32:54,681 INFO L87 Difference]: Start difference. First operand 224 states and 271 transitions. Second operand has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 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) [2021-05-06 06:32:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:56,159 INFO L93 Difference]: Finished difference Result 226 states and 273 transitions. [2021-05-06 06:32:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 06:32:56,159 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 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 223 [2021-05-06 06:32:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:56,160 INFO L225 Difference]: With dead ends: 226 [2021-05-06 06:32:56,160 INFO L226 Difference]: Without dead ends: 226 [2021-05-06 06:32:56,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1900.7ms TimeCoverageRelationStatistics Valid=2502, Invalid=4140, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 06:32:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-06 06:32:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2021-05-06 06:32:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.2171945701357465) internal successors, (269), 221 states have internal predecessors, (269), 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) [2021-05-06 06:32:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 273 transitions. [2021-05-06 06:32:56,164 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 273 transitions. Word has length 223 [2021-05-06 06:32:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:56,164 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 273 transitions. [2021-05-06 06:32:56,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.186046511627907) internal successors, (94), 42 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) [2021-05-06 06:32:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 273 transitions. [2021-05-06 06:32:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-05-06 06:32:56,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:56,166 INFO L523 BasicCegarLoop]: trace histogram [73, 39, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:56,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:56,369 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:56,369 INFO L82 PathProgramCache]: Analyzing trace with hash 226443674, now seen corresponding path program 38 times [2021-05-06 06:32:56,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:56,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574924671] [2021-05-06 06:32:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:57,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:32:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:32:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6451 backedges. 2680 proven. 1560 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-06 06:32:57,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:32:57,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574924671] [2021-05-06 06:32:57,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574924671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:57,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40173281] [2021-05-06 06:32:57,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:57,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:32:57,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:32:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 06:32:57,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:32:57,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:32:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6451 backedges. 2680 proven. 1560 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-06 06:32:57,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40173281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:32:57,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:32:57,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-06 06:32:57,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231698768] [2021-05-06 06:32:57,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 06:32:57,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:32:57,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 06:32:57,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 06:32:57,571 INFO L87 Difference]: Start difference. First operand 226 states and 273 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 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) [2021-05-06 06:32:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:32:59,247 INFO L93 Difference]: Finished difference Result 228 states and 275 transitions. [2021-05-06 06:32:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 06:32:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 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 225 [2021-05-06 06:32:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:32:59,248 INFO L225 Difference]: With dead ends: 228 [2021-05-06 06:32:59,248 INFO L226 Difference]: Without dead ends: 228 [2021-05-06 06:32:59,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2151.9ms TimeCoverageRelationStatistics Valid=2626, Invalid=4346, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 06:32:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-06 06:32:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-05-06 06:32:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.2152466367713004) internal successors, (271), 223 states have internal predecessors, (271), 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) [2021-05-06 06:32:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 275 transitions. [2021-05-06 06:32:59,252 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 275 transitions. Word has length 225 [2021-05-06 06:32:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:32:59,253 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 275 transitions. [2021-05-06 06:32:59,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 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) [2021-05-06 06:32:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 275 transitions. [2021-05-06 06:32:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-06 06:32:59,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:32:59,254 INFO L523 BasicCegarLoop]: trace histogram [74, 40, 34, 34, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:32:59,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:32:59,469 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:32:59,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:32:59,469 INFO L82 PathProgramCache]: Analyzing trace with hash -665374024, now seen corresponding path program 39 times [2021-05-06 06:32:59,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:32:59,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841970931] [2021-05-06 06:32:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:32:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:00,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6598 backedges. 2747 proven. 1640 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2021-05-06 06:33:00,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:00,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841970931] [2021-05-06 06:33:00,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841970931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:00,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608850948] [2021-05-06 06:33:00,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:00,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-06 06:33:00,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 06:33:00,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:00,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:00,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:01,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:01,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:01,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:01,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6598 backedges. 2200 proven. 338 refuted. 0 times theorem prover too weak. 4060 trivial. 0 not checked. [2021-05-06 06:33:01,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608850948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:01,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:01,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 16] total 58 [2021-05-06 06:33:01,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049696040] [2021-05-06 06:33:01,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 06:33:01,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 06:33:01,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 06:33:01,132 INFO L87 Difference]: Start difference. First operand 228 states and 275 transitions. Second operand has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 57 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:03,714 INFO L93 Difference]: Finished difference Result 236 states and 287 transitions. [2021-05-06 06:33:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 06:33:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 57 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2021-05-06 06:33:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:03,720 INFO L225 Difference]: With dead ends: 236 [2021-05-06 06:33:03,720 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 06:33:03,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 3469.6ms TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2021-05-06 06:33:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 06:33:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-05-06 06:33:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.2183406113537119) internal successors, (279), 229 states have internal predecessors, (279), 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) [2021-05-06 06:33:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 283 transitions. [2021-05-06 06:33:03,724 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 283 transitions. Word has length 227 [2021-05-06 06:33:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:03,724 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 283 transitions. [2021-05-06 06:33:03,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 57 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 283 transitions. [2021-05-06 06:33:03,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-05-06 06:33:03,725 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:03,725 INFO L523 BasicCegarLoop]: trace histogram [76, 41, 35, 35, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:03,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:03,938 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:03,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1854678991, now seen corresponding path program 40 times [2021-05-06 06:33:03,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:03,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204079760] [2021-05-06 06:33:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:04,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6966 backedges. 2898 proven. 1722 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-05-06 06:33:04,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:04,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204079760] [2021-05-06 06:33:04,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204079760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:04,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143347182] [2021-05-06 06:33:04,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:04,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:33:04,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:04,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 06:33:04,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:04,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:04,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6966 backedges. 2898 proven. 1722 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-05-06 06:33:05,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143347182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:05,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:05,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-06 06:33:05,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110453679] [2021-05-06 06:33:05,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 06:33:05,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:05,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 06:33:05,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 06:33:05,188 INFO L87 Difference]: Start difference. First operand 234 states and 283 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 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) [2021-05-06 06:33:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:06,812 INFO L93 Difference]: Finished difference Result 236 states and 285 transitions. [2021-05-06 06:33:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-06 06:33:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 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 233 [2021-05-06 06:33:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:06,813 INFO L225 Difference]: With dead ends: 236 [2021-05-06 06:33:06,813 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 06:33:06,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2198.2ms TimeCoverageRelationStatistics Valid=2883, Invalid=4773, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 06:33:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 06:33:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-05-06 06:33:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.2164502164502164) internal successors, (281), 231 states have internal predecessors, (281), 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) [2021-05-06 06:33:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2021-05-06 06:33:06,818 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 233 [2021-05-06 06:33:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:06,818 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2021-05-06 06:33:06,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 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) [2021-05-06 06:33:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2021-05-06 06:33:06,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-05-06 06:33:06,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:06,820 INFO L523 BasicCegarLoop]: trace histogram [77, 42, 35, 35, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:07,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 06:33:07,020 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1055398637, now seen corresponding path program 41 times [2021-05-06 06:33:07,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:07,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689169024] [2021-05-06 06:33:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:07,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 2967 proven. 1806 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-05-06 06:33:07,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:07,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689169024] [2021-05-06 06:33:07,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689169024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:07,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325460390] [2021-05-06 06:33:07,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:07,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2021-05-06 06:33:07,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:07,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 06:33:07,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:08,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:08,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:09,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:09,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:09,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:09,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:09,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:09,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 4258 proven. 1041 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2021-05-06 06:33:09,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325460390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:09,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:09,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 27] total 71 [2021-05-06 06:33:09,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940308500] [2021-05-06 06:33:09,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-06 06:33:09,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:09,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-06 06:33:09,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 06:33:09,264 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand has 71 states, 71 states have (on average 2.76056338028169) internal successors, (196), 70 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:12,809 INFO L93 Difference]: Finished difference Result 254 states and 307 transitions. [2021-05-06 06:33:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-06 06:33:12,809 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.76056338028169) internal successors, (196), 70 states have internal predecessors, (196), 2 states have call successors, (4), 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 235 [2021-05-06 06:33:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:12,810 INFO L225 Difference]: With dead ends: 254 [2021-05-06 06:33:12,810 INFO L226 Difference]: Without dead ends: 254 [2021-05-06 06:33:12,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 4954.8ms TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2021-05-06 06:33:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-06 06:33:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-05-06 06:33:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.216867469879518) internal successors, (303), 249 states have internal predecessors, (303), 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) [2021-05-06 06:33:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 307 transitions. [2021-05-06 06:33:12,815 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 307 transitions. Word has length 235 [2021-05-06 06:33:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:12,815 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 307 transitions. [2021-05-06 06:33:12,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.76056338028169) internal successors, (196), 70 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 307 transitions. [2021-05-06 06:33:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-05-06 06:33:12,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:12,816 INFO L523 BasicCegarLoop]: trace histogram [82, 43, 39, 39, 25, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:13,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:13,040 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:13,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:13,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1216755349, now seen corresponding path program 42 times [2021-05-06 06:33:13,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:13,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369424337] [2021-05-06 06:33:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:13,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8206 backedges. 3388 proven. 1892 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2021-05-06 06:33:13,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:13,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369424337] [2021-05-06 06:33:13,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369424337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:13,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582456149] [2021-05-06 06:33:13,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:14,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2021-05-06 06:33:14,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:14,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 06:33:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:14,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8206 backedges. 2682 proven. 392 refuted. 0 times theorem prover too weak. 5132 trivial. 0 not checked. [2021-05-06 06:33:14,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582456149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:14,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:14,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 17] total 62 [2021-05-06 06:33:14,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794760926] [2021-05-06 06:33:14,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 06:33:14,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:14,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 06:33:14,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 06:33:14,963 INFO L87 Difference]: Start difference. First operand 254 states and 307 transitions. Second operand has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 61 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:17,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:17,789 INFO L93 Difference]: Finished difference Result 262 states and 319 transitions. [2021-05-06 06:33:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 06:33:17,789 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 61 states have internal predecessors, (166), 2 states have call successors, (4), 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 253 [2021-05-06 06:33:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:17,790 INFO L225 Difference]: With dead ends: 262 [2021-05-06 06:33:17,790 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 06:33:17,791 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 3901.8ms TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2021-05-06 06:33:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 06:33:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2021-05-06 06:33:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.219607843137255) internal successors, (311), 255 states have internal predecessors, (311), 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) [2021-05-06 06:33:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-06 06:33:17,794 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 253 [2021-05-06 06:33:17,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:17,795 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-06 06:33:17,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.6774193548387095) internal successors, (166), 61 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-06 06:33:17,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-05-06 06:33:17,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:17,796 INFO L523 BasicCegarLoop]: trace histogram [84, 44, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:18,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:18,013 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1072692350, now seen corresponding path program 43 times [2021-05-06 06:33:18,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:18,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069568996] [2021-05-06 06:33:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:18,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8616 backedges. 3555 proven. 1980 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-06 06:33:18,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:18,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069568996] [2021-05-06 06:33:18,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069568996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:18,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070590230] [2021-05-06 06:33:18,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:18,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 06:33:18,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8616 backedges. 3555 proven. 1980 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-06 06:33:19,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070590230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:19,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:19,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-06 06:33:19,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676606489] [2021-05-06 06:33:19,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 06:33:19,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:19,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 06:33:19,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 06:33:19,356 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 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) [2021-05-06 06:33:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:21,159 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2021-05-06 06:33:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 06:33:21,159 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 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 259 [2021-05-06 06:33:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:21,160 INFO L225 Difference]: With dead ends: 262 [2021-05-06 06:33:21,160 INFO L226 Difference]: Without dead ends: 262 [2021-05-06 06:33:21,160 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2429.1ms TimeCoverageRelationStatistics Valid=3291, Invalid=5451, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 06:33:21,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-06 06:33:21,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-05-06 06:33:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.2178988326848248) internal successors, (313), 257 states have internal predecessors, (313), 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) [2021-05-06 06:33:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 317 transitions. [2021-05-06 06:33:21,163 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 317 transitions. Word has length 259 [2021-05-06 06:33:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:21,164 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 317 transitions. [2021-05-06 06:33:21,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 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) [2021-05-06 06:33:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 317 transitions. [2021-05-06 06:33:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-05-06 06:33:21,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:21,165 INFO L523 BasicCegarLoop]: trace histogram [85, 45, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:21,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-06 06:33:21,381 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash 789720352, now seen corresponding path program 44 times [2021-05-06 06:33:21,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:21,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426879828] [2021-05-06 06:33:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:22,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8785 backedges. 3634 proven. 2070 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-06 06:33:22,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:22,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426879828] [2021-05-06 06:33:22,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426879828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:22,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670104407] [2021-05-06 06:33:22,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:22,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:33:22,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:22,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 06:33:22,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:22,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8785 backedges. 3634 proven. 2070 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-06 06:33:22,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670104407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:22,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:22,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-06 06:33:22,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615747592] [2021-05-06 06:33:22,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 06:33:22,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 06:33:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 06:33:22,668 INFO L87 Difference]: Start difference. First operand 262 states and 317 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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) [2021-05-06 06:33:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:24,587 INFO L93 Difference]: Finished difference Result 264 states and 319 transitions. [2021-05-06 06:33:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-06 06:33:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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 261 [2021-05-06 06:33:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:24,588 INFO L225 Difference]: With dead ends: 264 [2021-05-06 06:33:24,588 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 06:33:24,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 2488.0ms TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 06:33:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 06:33:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-05-06 06:33:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.2162162162162162) internal successors, (315), 259 states have internal predecessors, (315), 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) [2021-05-06 06:33:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 319 transitions. [2021-05-06 06:33:24,591 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 319 transitions. Word has length 261 [2021-05-06 06:33:24,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:24,591 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 319 transitions. [2021-05-06 06:33:24,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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) [2021-05-06 06:33:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 319 transitions. [2021-05-06 06:33:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-05-06 06:33:24,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:24,592 INFO L523 BasicCegarLoop]: trace histogram [86, 46, 40, 40, 25, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:24,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-06 06:33:24,793 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:24,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:24,793 INFO L82 PathProgramCache]: Analyzing trace with hash -433035458, now seen corresponding path program 45 times [2021-05-06 06:33:24,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:24,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131589866] [2021-05-06 06:33:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:25,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8956 backedges. 3713 proven. 2162 refuted. 0 times theorem prover too weak. 3081 trivial. 0 not checked. [2021-05-06 06:33:25,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:25,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131589866] [2021-05-06 06:33:25,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131589866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:25,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27745427] [2021-05-06 06:33:25,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:25,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-05-06 06:33:25,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:25,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 06:33:25,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:26,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8956 backedges. 2960 proven. 450 refuted. 0 times theorem prover too weak. 5546 trivial. 0 not checked. [2021-05-06 06:33:26,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27745427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:26,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:26,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 18] total 66 [2021-05-06 06:33:26,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030093920] [2021-05-06 06:33:26,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 06:33:26,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 06:33:26,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 06:33:26,835 INFO L87 Difference]: Start difference. First operand 264 states and 319 transitions. Second operand has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:29,986 INFO L93 Difference]: Finished difference Result 272 states and 331 transitions. [2021-05-06 06:33:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 06:33:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 2 states have call successors, (4), 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 263 [2021-05-06 06:33:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:29,987 INFO L225 Difference]: With dead ends: 272 [2021-05-06 06:33:29,987 INFO L226 Difference]: Without dead ends: 272 [2021-05-06 06:33:29,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 4330.4ms TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2021-05-06 06:33:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-06 06:33:29,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 270. [2021-05-06 06:33:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.2188679245283018) internal successors, (323), 265 states have internal predecessors, (323), 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) [2021-05-06 06:33:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 327 transitions. [2021-05-06 06:33:29,991 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 327 transitions. Word has length 263 [2021-05-06 06:33:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:29,991 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 327 transitions. [2021-05-06 06:33:29,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 327 transitions. [2021-05-06 06:33:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-05-06 06:33:29,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:29,993 INFO L523 BasicCegarLoop]: trace histogram [88, 47, 41, 41, 25, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:30,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 06:33:30,216 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1833487787, now seen corresponding path program 46 times [2021-05-06 06:33:30,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:30,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732562339] [2021-05-06 06:33:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:31,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3888 proven. 2256 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2021-05-06 06:33:31,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:31,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732562339] [2021-05-06 06:33:31,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732562339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:31,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933135419] [2021-05-06 06:33:31,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:31,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:33:31,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:31,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 06:33:31,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:31,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3888 proven. 2256 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2021-05-06 06:33:31,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933135419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:31,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:31,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-06 06:33:31,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311024745] [2021-05-06 06:33:31,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 06:33:31,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:31,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 06:33:31,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 06:33:31,620 INFO L87 Difference]: Start difference. First operand 270 states and 327 transitions. Second operand has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 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) [2021-05-06 06:33:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:33,645 INFO L93 Difference]: Finished difference Result 272 states and 329 transitions. [2021-05-06 06:33:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-06 06:33:33,646 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 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 269 [2021-05-06 06:33:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:33,647 INFO L225 Difference]: With dead ends: 272 [2021-05-06 06:33:33,647 INFO L226 Difference]: Without dead ends: 272 [2021-05-06 06:33:33,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 2668.2ms TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2021-05-06 06:33:33,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-06 06:33:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-05-06 06:33:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.2172284644194757) internal successors, (325), 267 states have internal predecessors, (325), 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) [2021-05-06 06:33:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 329 transitions. [2021-05-06 06:33:33,651 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 329 transitions. Word has length 269 [2021-05-06 06:33:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:33,651 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 329 transitions. [2021-05-06 06:33:33,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 51 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) [2021-05-06 06:33:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 329 transitions. [2021-05-06 06:33:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-05-06 06:33:33,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:33,652 INFO L523 BasicCegarLoop]: trace histogram [89, 48, 41, 41, 25, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:33,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:33,868 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash 755002995, now seen corresponding path program 47 times [2021-05-06 06:33:33,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:33,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12177545] [2021-05-06 06:33:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:34,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9561 backedges. 3969 proven. 2352 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2021-05-06 06:33:34,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12177545] [2021-05-06 06:33:34,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12177545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401587452] [2021-05-06 06:33:34,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:34,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 59 check-sat command(s) [2021-05-06 06:33:34,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:34,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 06:33:35,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:35,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:35,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9561 backedges. 5694 proven. 1437 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2021-05-06 06:33:36,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401587452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:36,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:36,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 31] total 81 [2021-05-06 06:33:36,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975427829] [2021-05-06 06:33:36,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-06 06:33:36,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:36,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-06 06:33:36,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 06:33:36,803 INFO L87 Difference]: Start difference. First operand 272 states and 329 transitions. Second operand has 81 states, 81 states have (on average 2.765432098765432) internal successors, (224), 80 states have internal predecessors, (224), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:41,248 INFO L93 Difference]: Finished difference Result 290 states and 351 transitions. [2021-05-06 06:33:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-06 06:33:41,248 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.765432098765432) internal successors, (224), 80 states have internal predecessors, (224), 2 states have call successors, (4), 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 271 [2021-05-06 06:33:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:41,249 INFO L225 Difference]: With dead ends: 290 [2021-05-06 06:33:41,249 INFO L226 Difference]: Without dead ends: 290 [2021-05-06 06:33:41,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 6392.2ms TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2021-05-06 06:33:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-06 06:33:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-05-06 06:33:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.2175438596491228) internal successors, (347), 285 states have internal predecessors, (347), 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) [2021-05-06 06:33:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 351 transitions. [2021-05-06 06:33:41,252 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 351 transitions. Word has length 271 [2021-05-06 06:33:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:41,252 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 351 transitions. [2021-05-06 06:33:41,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.765432098765432) internal successors, (224), 80 states have internal predecessors, (224), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 351 transitions. [2021-05-06 06:33:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-05-06 06:33:41,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:41,254 INFO L523 BasicCegarLoop]: trace histogram [94, 49, 45, 45, 29, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:41,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:41,454 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:41,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2135974415, now seen corresponding path program 48 times [2021-05-06 06:33:41,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:41,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673967220] [2021-05-06 06:33:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:42,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 4450 proven. 2450 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2021-05-06 06:33:42,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:42,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673967220] [2021-05-06 06:33:42,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673967220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:42,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744954397] [2021-05-06 06:33:42,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:42,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-05-06 06:33:42,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 06:33:42,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:42,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:42,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:42,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:42,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:42,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:42,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3514 proven. 512 refuted. 0 times theorem prover too weak. 6790 trivial. 0 not checked. [2021-05-06 06:33:43,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744954397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:43,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:43,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 19] total 70 [2021-05-06 06:33:43,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111442743] [2021-05-06 06:33:43,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 06:33:43,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 06:33:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 06:33:43,726 INFO L87 Difference]: Start difference. First operand 290 states and 351 transitions. Second operand has 70 states, 70 states have (on average 2.657142857142857) internal successors, (186), 69 states have internal predecessors, (186), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:47,209 INFO L93 Difference]: Finished difference Result 298 states and 363 transitions. [2021-05-06 06:33:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 06:33:47,209 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.657142857142857) internal successors, (186), 69 states have internal predecessors, (186), 2 states have call successors, (4), 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 289 [2021-05-06 06:33:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:47,210 INFO L225 Difference]: With dead ends: 298 [2021-05-06 06:33:47,210 INFO L226 Difference]: Without dead ends: 298 [2021-05-06 06:33:47,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 4823.7ms TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2021-05-06 06:33:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-06 06:33:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2021-05-06 06:33:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.2199312714776633) internal successors, (355), 291 states have internal predecessors, (355), 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) [2021-05-06 06:33:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 359 transitions. [2021-05-06 06:33:47,214 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 359 transitions. Word has length 289 [2021-05-06 06:33:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:47,214 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 359 transitions. [2021-05-06 06:33:47,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.657142857142857) internal successors, (186), 69 states have internal predecessors, (186), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:33:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 359 transitions. [2021-05-06 06:33:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-05-06 06:33:47,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:47,216 INFO L523 BasicCegarLoop]: trace histogram [96, 50, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:47,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-06 06:33:47,429 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1920888328, now seen corresponding path program 49 times [2021-05-06 06:33:47,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:47,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581216658] [2021-05-06 06:33:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:48,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11286 backedges. 4641 proven. 2550 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-06 06:33:48,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:48,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581216658] [2021-05-06 06:33:48,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581216658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:48,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864609669] [2021-05-06 06:33:48,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:48,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 06:33:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:48,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:48,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11286 backedges. 4641 proven. 2550 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-06 06:33:49,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864609669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:49,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:49,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-06 06:33:49,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016392467] [2021-05-06 06:33:49,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-06 06:33:49,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-06 06:33:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 06:33:49,040 INFO L87 Difference]: Start difference. First operand 296 states and 359 transitions. Second operand has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 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) [2021-05-06 06:33:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:51,216 INFO L93 Difference]: Finished difference Result 298 states and 361 transitions. [2021-05-06 06:33:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 06:33:51,216 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 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 295 [2021-05-06 06:33:51,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:51,217 INFO L225 Difference]: With dead ends: 298 [2021-05-06 06:33:51,217 INFO L226 Difference]: Without dead ends: 298 [2021-05-06 06:33:51,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 3008.6ms TimeCoverageRelationStatistics Valid=4188, Invalid=6942, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 06:33:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-06 06:33:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2021-05-06 06:33:51,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.2184300341296928) internal successors, (357), 293 states have internal predecessors, (357), 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) [2021-05-06 06:33:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 361 transitions. [2021-05-06 06:33:51,221 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 361 transitions. Word has length 295 [2021-05-06 06:33:51,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:51,221 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 361 transitions. [2021-05-06 06:33:51,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 54 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) [2021-05-06 06:33:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 361 transitions. [2021-05-06 06:33:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-05-06 06:33:51,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:51,223 INFO L523 BasicCegarLoop]: trace histogram [97, 51, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:51,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:51,437 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash 183804070, now seen corresponding path program 50 times [2021-05-06 06:33:51,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:51,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501044027] [2021-05-06 06:33:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:52,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11479 backedges. 4732 proven. 2652 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-06 06:33:52,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:52,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501044027] [2021-05-06 06:33:52,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501044027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:52,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167089737] [2021-05-06 06:33:52,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:52,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:33:52,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 06:33:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:52,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11479 backedges. 4732 proven. 2652 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-06 06:33:52,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167089737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:52,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:52,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2021-05-06 06:33:52,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864959713] [2021-05-06 06:33:52,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 06:33:52,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:52,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 06:33:52,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 06:33:52,987 INFO L87 Difference]: Start difference. First operand 298 states and 361 transitions. Second operand has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 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) [2021-05-06 06:33:55,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:33:55,325 INFO L93 Difference]: Finished difference Result 300 states and 363 transitions. [2021-05-06 06:33:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-06 06:33:55,325 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 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 297 [2021-05-06 06:33:55,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:33:55,326 INFO L225 Difference]: With dead ends: 300 [2021-05-06 06:33:55,326 INFO L226 Difference]: Without dead ends: 300 [2021-05-06 06:33:55,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 3066.4ms TimeCoverageRelationStatistics Valid=4348, Invalid=7208, Unknown=0, NotChecked=0, Total=11556 [2021-05-06 06:33:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-06 06:33:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-05-06 06:33:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.2169491525423728) internal successors, (359), 295 states have internal predecessors, (359), 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) [2021-05-06 06:33:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 363 transitions. [2021-05-06 06:33:55,329 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 363 transitions. Word has length 297 [2021-05-06 06:33:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:33:55,329 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 363 transitions. [2021-05-06 06:33:55,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.142857142857143) internal successors, (120), 55 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) [2021-05-06 06:33:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 363 transitions. [2021-05-06 06:33:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-05-06 06:33:55,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:33:55,330 INFO L523 BasicCegarLoop]: trace histogram [98, 52, 46, 46, 29, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:33:55,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-06 06:33:55,531 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:33:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:33:55,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1588110276, now seen corresponding path program 51 times [2021-05-06 06:33:55,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:33:55,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122023838] [2021-05-06 06:33:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:33:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:56,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:33:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:33:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11674 backedges. 4823 proven. 2756 refuted. 0 times theorem prover too weak. 4095 trivial. 0 not checked. [2021-05-06 06:33:56,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:33:56,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122023838] [2021-05-06 06:33:56,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122023838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:56,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416757627] [2021-05-06 06:33:56,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:33:56,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-05-06 06:33:56,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:33:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 06:33:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:33:57,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:33:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11674 backedges. 3832 proven. 578 refuted. 0 times theorem prover too weak. 7264 trivial. 0 not checked. [2021-05-06 06:33:57,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416757627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:33:57,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:33:57,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 20] total 74 [2021-05-06 06:33:57,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088765557] [2021-05-06 06:33:57,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 06:33:57,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:33:57,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 06:33:57,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 06:33:57,936 INFO L87 Difference]: Start difference. First operand 300 states and 363 transitions. Second operand has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 73 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:34:01,756 INFO L93 Difference]: Finished difference Result 308 states and 375 transitions. [2021-05-06 06:34:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 06:34:01,757 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 73 states have internal predecessors, (196), 2 states have call successors, (4), 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 299 [2021-05-06 06:34:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:34:01,758 INFO L225 Difference]: With dead ends: 308 [2021-05-06 06:34:01,758 INFO L226 Difference]: Without dead ends: 308 [2021-05-06 06:34:01,759 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 5291.2ms TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2021-05-06 06:34:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-06 06:34:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 306. [2021-05-06 06:34:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2192691029900333) internal successors, (367), 301 states have internal predecessors, (367), 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) [2021-05-06 06:34:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 371 transitions. [2021-05-06 06:34:01,761 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 371 transitions. Word has length 299 [2021-05-06 06:34:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:34:01,761 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 371 transitions. [2021-05-06 06:34:01,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.6486486486486487) internal successors, (196), 73 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 371 transitions. [2021-05-06 06:34:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-05-06 06:34:01,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:34:01,762 INFO L523 BasicCegarLoop]: trace histogram [100, 53, 47, 47, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:34:01,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-06 06:34:01,963 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:34:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:34:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1097647323, now seen corresponding path program 52 times [2021-05-06 06:34:01,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:34:01,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871035281] [2021-05-06 06:34:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:34:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:03,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:34:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12162 backedges. 5022 proven. 2862 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2021-05-06 06:34:03,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:34:03,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871035281] [2021-05-06 06:34:03,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871035281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:03,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137679119] [2021-05-06 06:34:03,150 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 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 [2021-05-06 06:34:03,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:34:03,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:34:03,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 06:34:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:34:03,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12162 backedges. 5022 proven. 2862 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2021-05-06 06:34:03,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137679119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:03,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:34:03,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-05-06 06:34:03,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208587822] [2021-05-06 06:34:03,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 06:34:03,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:34:03,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 06:34:03,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 06:34:03,649 INFO L87 Difference]: Start difference. First operand 306 states and 371 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 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) [2021-05-06 06:34:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:34:06,146 INFO L93 Difference]: Finished difference Result 308 states and 373 transitions. [2021-05-06 06:34:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-06 06:34:06,146 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 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 305 [2021-05-06 06:34:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:34:06,147 INFO L225 Difference]: With dead ends: 308 [2021-05-06 06:34:06,147 INFO L226 Difference]: Without dead ends: 308 [2021-05-06 06:34:06,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 3288.4ms TimeCoverageRelationStatistics Valid=4677, Invalid=7755, Unknown=0, NotChecked=0, Total=12432 [2021-05-06 06:34:06,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-06 06:34:06,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-05-06 06:34:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.2178217821782178) internal successors, (369), 303 states have internal predecessors, (369), 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) [2021-05-06 06:34:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 373 transitions. [2021-05-06 06:34:06,154 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 373 transitions. Word has length 305 [2021-05-06 06:34:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:34:06,154 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 373 transitions. [2021-05-06 06:34:06,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 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) [2021-05-06 06:34:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 373 transitions. [2021-05-06 06:34:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-05-06 06:34:06,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:34:06,156 INFO L523 BasicCegarLoop]: trace histogram [101, 54, 47, 47, 29, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:34:06,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-06 06:34:06,373 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:34:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:34:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash -831337991, now seen corresponding path program 53 times [2021-05-06 06:34:06,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:34:06,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838364123] [2021-05-06 06:34:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:34:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:07,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:34:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12363 backedges. 5115 proven. 2970 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2021-05-06 06:34:07,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:34:07,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838364123] [2021-05-06 06:34:07,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838364123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:07,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387509250] [2021-05-06 06:34:07,609 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 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 [2021-05-06 06:34:07,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2021-05-06 06:34:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:34:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 06:34:07,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:34:07,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:07,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:07,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:07,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:07,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:07,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:07,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:07,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:07,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:07,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:08,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12363 backedges. 7338 proven. 1897 refuted. 0 times theorem prover too weak. 3128 trivial. 0 not checked. [2021-05-06 06:34:09,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387509250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:09,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:34:09,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 35] total 91 [2021-05-06 06:34:09,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774881385] [2021-05-06 06:34:09,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-06 06:34:09,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:34:09,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-06 06:34:09,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 06:34:09,807 INFO L87 Difference]: Start difference. First operand 308 states and 373 transitions. Second operand has 91 states, 91 states have (on average 2.769230769230769) internal successors, (252), 90 states have internal predecessors, (252), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:15,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:34:15,263 INFO L93 Difference]: Finished difference Result 326 states and 395 transitions. [2021-05-06 06:34:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-06 06:34:15,263 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.769230769230769) internal successors, (252), 90 states have internal predecessors, (252), 2 states have call successors, (4), 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 307 [2021-05-06 06:34:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:34:15,264 INFO L225 Difference]: With dead ends: 326 [2021-05-06 06:34:15,264 INFO L226 Difference]: Without dead ends: 326 [2021-05-06 06:34:15,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3882 ImplicationChecksByTransitivity, 7845.1ms TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2021-05-06 06:34:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-06 06:34:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2021-05-06 06:34:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 321 states have (on average 1.2180685358255452) internal successors, (391), 321 states have internal predecessors, (391), 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) [2021-05-06 06:34:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 395 transitions. [2021-05-06 06:34:15,268 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 395 transitions. Word has length 307 [2021-05-06 06:34:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:34:15,268 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 395 transitions. [2021-05-06 06:34:15,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.769230769230769) internal successors, (252), 90 states have internal predecessors, (252), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 395 transitions. [2021-05-06 06:34:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-05-06 06:34:15,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:34:15,270 INFO L523 BasicCegarLoop]: trace histogram [106, 55, 51, 51, 33, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:34:15,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-06 06:34:15,493 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:34:15,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:34:15,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2107308663, now seen corresponding path program 54 times [2021-05-06 06:34:15,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:34:15,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743535260] [2021-05-06 06:34:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:34:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:16,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:34:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13786 backedges. 5656 proven. 3080 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2021-05-06 06:34:16,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:34:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743535260] [2021-05-06 06:34:16,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743535260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924453757] [2021-05-06 06:34:16,767 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 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 [2021-05-06 06:34:16,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2021-05-06 06:34:16,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:34:16,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 06:34:16,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:34:17,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:17,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:18,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:18,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:18,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:18,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:18,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:18,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13786 backedges. 4458 proven. 648 refuted. 0 times theorem prover too weak. 8680 trivial. 0 not checked. [2021-05-06 06:34:18,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924453757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:18,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:34:18,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 21] total 78 [2021-05-06 06:34:18,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669815224] [2021-05-06 06:34:18,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 06:34:18,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:34:18,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 06:34:18,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 06:34:18,192 INFO L87 Difference]: Start difference. First operand 326 states and 395 transitions. Second operand has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:34:22,388 INFO L93 Difference]: Finished difference Result 334 states and 407 transitions. [2021-05-06 06:34:22,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 06:34:22,388 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 2 states have call successors, (4), 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 325 [2021-05-06 06:34:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:34:22,389 INFO L225 Difference]: With dead ends: 334 [2021-05-06 06:34:22,389 INFO L226 Difference]: Without dead ends: 334 [2021-05-06 06:34:22,390 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 5877.1ms TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2021-05-06 06:34:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-06 06:34:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2021-05-06 06:34:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.2201834862385321) internal successors, (399), 327 states have internal predecessors, (399), 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) [2021-05-06 06:34:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 403 transitions. [2021-05-06 06:34:22,392 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 403 transitions. Word has length 325 [2021-05-06 06:34:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:34:22,392 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 403 transitions. [2021-05-06 06:34:22,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 403 transitions. [2021-05-06 06:34:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-05-06 06:34:22,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:34:22,394 INFO L523 BasicCegarLoop]: trace histogram [108, 56, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:34:22,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:34:22,594 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:34:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:34:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2064785266, now seen corresponding path program 55 times [2021-05-06 06:34:22,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:34:22,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473837718] [2021-05-06 06:34:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:34:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:23,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:34:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14316 backedges. 5871 proven. 3192 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-06 06:34:23,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:34:23,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473837718] [2021-05-06 06:34:23,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473837718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:23,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154631324] [2021-05-06 06:34:23,911 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 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 [2021-05-06 06:34:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:24,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 06:34:24,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:34:24,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14316 backedges. 5871 proven. 3192 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-06 06:34:24,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154631324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:24,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:34:24,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2021-05-06 06:34:24,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792400168] [2021-05-06 06:34:24,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-06 06:34:24,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:34:24,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-06 06:34:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 06:34:24,408 INFO L87 Difference]: Start difference. First operand 332 states and 403 transitions. Second operand has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:34:26,970 INFO L93 Difference]: Finished difference Result 334 states and 405 transitions. [2021-05-06 06:34:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 06:34:26,970 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (4), 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 331 [2021-05-06 06:34:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:34:26,971 INFO L225 Difference]: With dead ends: 334 [2021-05-06 06:34:26,971 INFO L226 Difference]: Without dead ends: 334 [2021-05-06 06:34:26,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 3598.0ms TimeCoverageRelationStatistics Valid=5193, Invalid=8613, Unknown=0, NotChecked=0, Total=13806 [2021-05-06 06:34:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-06 06:34:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2021-05-06 06:34:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 329 states have (on average 1.2188449848024316) internal successors, (401), 329 states have internal predecessors, (401), 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) [2021-05-06 06:34:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 405 transitions. [2021-05-06 06:34:26,974 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 405 transitions. Word has length 331 [2021-05-06 06:34:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:34:26,975 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 405 transitions. [2021-05-06 06:34:26,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 60 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 405 transitions. [2021-05-06 06:34:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-05-06 06:34:26,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:34:26,976 INFO L523 BasicCegarLoop]: trace histogram [109, 57, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:34:27,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-06 06:34:27,193 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:34:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:34:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2092458964, now seen corresponding path program 56 times [2021-05-06 06:34:27,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:34:27,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804896907] [2021-05-06 06:34:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:34:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:28,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:34:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14533 backedges. 5974 proven. 3306 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-06 06:34:28,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:34:28,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804896907] [2021-05-06 06:34:28,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804896907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:28,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723632983] [2021-05-06 06:34:28,563 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 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 [2021-05-06 06:34:28,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:34:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:34:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 06:34:28,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:34:28,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:28,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:29,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14533 backedges. 5974 proven. 3306 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-06 06:34:29,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723632983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:29,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:34:29,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 62 [2021-05-06 06:34:29,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361405241] [2021-05-06 06:34:29,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 06:34:29,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:34:29,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 06:34:29,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 06:34:29,041 INFO L87 Difference]: Start difference. First operand 334 states and 405 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:34:31,787 INFO L93 Difference]: Finished difference Result 336 states and 407 transitions. [2021-05-06 06:34:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-06 06:34:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (4), 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 333 [2021-05-06 06:34:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:34:31,789 INFO L225 Difference]: With dead ends: 336 [2021-05-06 06:34:31,789 INFO L226 Difference]: Without dead ends: 336 [2021-05-06 06:34:31,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 3714.9ms TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2021-05-06 06:34:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-06 06:34:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2021-05-06 06:34:31,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 331 states have (on average 1.2175226586102719) internal successors, (403), 331 states have internal predecessors, (403), 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) [2021-05-06 06:34:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 407 transitions. [2021-05-06 06:34:31,792 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 407 transitions. Word has length 333 [2021-05-06 06:34:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:34:31,792 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 407 transitions. [2021-05-06 06:34:31,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 407 transitions. [2021-05-06 06:34:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-05-06 06:34:31,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:34:31,794 INFO L523 BasicCegarLoop]: trace histogram [110, 58, 52, 52, 33, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:34:32,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:34:32,017 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:34:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:34:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1377888330, now seen corresponding path program 57 times [2021-05-06 06:34:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:34:32,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443947778] [2021-05-06 06:34:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:34:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:33,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:34:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14752 backedges. 6077 proven. 3422 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-05-06 06:34:33,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:34:33,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443947778] [2021-05-06 06:34:33,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443947778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:33,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375518596] [2021-05-06 06:34:33,432 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 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 [2021-05-06 06:34:33,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-06 06:34:33,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:34:33,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 06:34:33,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:34:33,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:33,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:33,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:33,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:33,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:33,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:33,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:33,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14752 backedges. 4816 proven. 722 refuted. 0 times theorem prover too weak. 9214 trivial. 0 not checked. [2021-05-06 06:34:34,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375518596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:34,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:34:34,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 22] total 82 [2021-05-06 06:34:34,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651307929] [2021-05-06 06:34:34,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 06:34:34,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:34:34,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 06:34:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 06:34:34,963 INFO L87 Difference]: Start difference. First operand 336 states and 407 transitions. Second operand has 82 states, 82 states have (on average 2.6341463414634148) internal successors, (216), 81 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:34:39,621 INFO L93 Difference]: Finished difference Result 344 states and 419 transitions. [2021-05-06 06:34:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 06:34:39,623 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.6341463414634148) internal successors, (216), 81 states have internal predecessors, (216), 2 states have call successors, (4), 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 335 [2021-05-06 06:34:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:34:39,624 INFO L225 Difference]: With dead ends: 344 [2021-05-06 06:34:39,624 INFO L226 Difference]: Without dead ends: 344 [2021-05-06 06:34:39,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3139 ImplicationChecksByTransitivity, 6478.4ms TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2021-05-06 06:34:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-06 06:34:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 342. [2021-05-06 06:34:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 337 states have (on average 1.2195845697329377) internal successors, (411), 337 states have internal predecessors, (411), 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) [2021-05-06 06:34:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 415 transitions. [2021-05-06 06:34:39,628 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 415 transitions. Word has length 335 [2021-05-06 06:34:39,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:34:39,628 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 415 transitions. [2021-05-06 06:34:39,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.6341463414634148) internal successors, (216), 81 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 415 transitions. [2021-05-06 06:34:39,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-05-06 06:34:39,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:34:39,629 INFO L523 BasicCegarLoop]: trace histogram [112, 59, 53, 53, 33, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:34:39,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-06 06:34:39,830 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:34:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:34:39,830 INFO L82 PathProgramCache]: Analyzing trace with hash -254943391, now seen corresponding path program 58 times [2021-05-06 06:34:39,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:34:39,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916607048] [2021-05-06 06:34:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:34:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:41,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:34:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15300 backedges. 6300 proven. 3540 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2021-05-06 06:34:41,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:34:41,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916607048] [2021-05-06 06:34:41,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916607048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:41,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693287266] [2021-05-06 06:34:41,266 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 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 [2021-05-06 06:34:41,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:34:41,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:34:41,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 06:34:41,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:34:41,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15300 backedges. 6300 proven. 3540 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2021-05-06 06:34:41,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693287266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:41,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:34:41,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2021-05-06 06:34:41,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156383963] [2021-05-06 06:34:41,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 06:34:41,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:34:41,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 06:34:41,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 06:34:41,759 INFO L87 Difference]: Start difference. First operand 342 states and 415 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:34:44,562 INFO L93 Difference]: Finished difference Result 344 states and 417 transitions. [2021-05-06 06:34:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-06 06:34:44,563 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (4), 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 341 [2021-05-06 06:34:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:34:44,564 INFO L225 Difference]: With dead ends: 344 [2021-05-06 06:34:44,564 INFO L226 Difference]: Without dead ends: 344 [2021-05-06 06:34:44,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 3940.4ms TimeCoverageRelationStatistics Valid=5736, Invalid=9516, Unknown=0, NotChecked=0, Total=15252 [2021-05-06 06:34:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-06 06:34:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-05-06 06:34:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 339 states have (on average 1.2182890855457227) internal successors, (413), 339 states have internal predecessors, (413), 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) [2021-05-06 06:34:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 417 transitions. [2021-05-06 06:34:44,567 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 417 transitions. Word has length 341 [2021-05-06 06:34:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:34:44,567 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 417 transitions. [2021-05-06 06:34:44,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 417 transitions. [2021-05-06 06:34:44,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-05-06 06:34:44,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:34:44,568 INFO L523 BasicCegarLoop]: trace histogram [113, 60, 53, 53, 33, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:34:44,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:34:44,770 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:34:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:34:44,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2019545729, now seen corresponding path program 59 times [2021-05-06 06:34:44,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:34:44,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933918296] [2021-05-06 06:34:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:34:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:46,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:34:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15525 backedges. 6405 proven. 3660 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2021-05-06 06:34:46,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:34:46,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933918296] [2021-05-06 06:34:46,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933918296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:46,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646642327] [2021-05-06 06:34:46,265 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:34:46,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 75 check-sat command(s) [2021-05-06 06:34:46,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:34:46,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 06:34:46,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:34:46,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:46,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:47,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15525 backedges. 9190 proven. 2421 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2021-05-06 06:34:48,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646642327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:48,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:34:48,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 39] total 101 [2021-05-06 06:34:48,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081091744] [2021-05-06 06:34:48,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-06 06:34:48,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:34:48,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-06 06:34:48,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-06 06:34:48,970 INFO L87 Difference]: Start difference. First operand 344 states and 417 transitions. Second operand has 101 states, 101 states have (on average 2.772277227722772) internal successors, (280), 100 states have internal predecessors, (280), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:34:55,641 INFO L93 Difference]: Finished difference Result 362 states and 439 transitions. [2021-05-06 06:34:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-06 06:34:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.772277227722772) internal successors, (280), 100 states have internal predecessors, (280), 2 states have call successors, (4), 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 343 [2021-05-06 06:34:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:34:55,643 INFO L225 Difference]: With dead ends: 362 [2021-05-06 06:34:55,643 INFO L226 Difference]: Without dead ends: 362 [2021-05-06 06:34:55,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4813 ImplicationChecksByTransitivity, 9616.7ms TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2021-05-06 06:34:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-06 06:34:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2021-05-06 06:34:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 357 states have (on average 1.218487394957983) internal successors, (435), 357 states have internal predecessors, (435), 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) [2021-05-06 06:34:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 439 transitions. [2021-05-06 06:34:55,648 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 439 transitions. Word has length 343 [2021-05-06 06:34:55,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:34:55,649 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 439 transitions. [2021-05-06 06:34:55,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.772277227722772) internal successors, (280), 100 states have internal predecessors, (280), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:34:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 439 transitions. [2021-05-06 06:34:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-05-06 06:34:55,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:34:55,651 INFO L523 BasicCegarLoop]: trace histogram [118, 61, 57, 57, 37, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:34:55,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-06 06:34:55,865 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:34:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:34:55,865 INFO L82 PathProgramCache]: Analyzing trace with hash -757276931, now seen corresponding path program 60 times [2021-05-06 06:34:55,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:34:55,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687511818] [2021-05-06 06:34:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:34:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:57,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:34:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:34:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17116 backedges. 7006 proven. 3782 refuted. 0 times theorem prover too weak. 6328 trivial. 0 not checked. [2021-05-06 06:34:57,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:34:57,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687511818] [2021-05-06 06:34:57,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687511818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:57,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779856032] [2021-05-06 06:34:57,558 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:34:57,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2021-05-06 06:34:57,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:34:57,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 06:34:57,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:34:57,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:58,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:59,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:59,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:59,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:59,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:59,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:59,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:59,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:59,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:34:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17116 backedges. 5514 proven. 800 refuted. 0 times theorem prover too weak. 10802 trivial. 0 not checked. [2021-05-06 06:34:59,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779856032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:34:59,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:34:59,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 23] total 86 [2021-05-06 06:34:59,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15885398] [2021-05-06 06:34:59,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 06:34:59,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:34:59,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 06:34:59,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 06:34:59,278 INFO L87 Difference]: Start difference. First operand 362 states and 439 transitions. Second operand has 86 states, 86 states have (on average 2.627906976744186) internal successors, (226), 85 states have internal predecessors, (226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:04,355 INFO L93 Difference]: Finished difference Result 370 states and 451 transitions. [2021-05-06 06:35:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 06:35:04,366 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.627906976744186) internal successors, (226), 85 states have internal predecessors, (226), 2 states have call successors, (4), 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 361 [2021-05-06 06:35:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:04,367 INFO L225 Difference]: With dead ends: 370 [2021-05-06 06:35:04,367 INFO L226 Difference]: Without dead ends: 370 [2021-05-06 06:35:04,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 7287.6ms TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2021-05-06 06:35:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-06 06:35:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 368. [2021-05-06 06:35:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 363 states have (on average 1.2203856749311295) internal successors, (443), 363 states have internal predecessors, (443), 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) [2021-05-06 06:35:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 447 transitions. [2021-05-06 06:35:04,371 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 447 transitions. Word has length 361 [2021-05-06 06:35:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:04,371 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 447 transitions. [2021-05-06 06:35:04,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.627906976744186) internal successors, (226), 85 states have internal predecessors, (226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 447 transitions. [2021-05-06 06:35:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-05-06 06:35:04,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:04,373 INFO L523 BasicCegarLoop]: trace histogram [120, 62, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:04,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:04,574 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:04,574 INFO L82 PathProgramCache]: Analyzing trace with hash 297753364, now seen corresponding path program 61 times [2021-05-06 06:35:04,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:04,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970681564] [2021-05-06 06:35:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:06,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 17706 backedges. 7245 proven. 3906 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-06 06:35:06,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:06,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970681564] [2021-05-06 06:35:06,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970681564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:06,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584178239] [2021-05-06 06:35:06,164 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:06,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 06:35:06,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:35:06,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17706 backedges. 7245 proven. 3906 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-06 06:35:06,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584178239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:06,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:35:06,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2021-05-06 06:35:06,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209946769] [2021-05-06 06:35:06,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-06 06:35:06,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:06,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-06 06:35:06,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 06:35:06,719 INFO L87 Difference]: Start difference. First operand 368 states and 447 transitions. Second operand has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:09,892 INFO L93 Difference]: Finished difference Result 370 states and 449 transitions. [2021-05-06 06:35:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 06:35:09,892 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (4), 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 367 [2021-05-06 06:35:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:09,893 INFO L225 Difference]: With dead ends: 370 [2021-05-06 06:35:09,893 INFO L226 Difference]: Without dead ends: 370 [2021-05-06 06:35:09,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 4319.3ms TimeCoverageRelationStatistics Valid=6306, Invalid=10464, Unknown=0, NotChecked=0, Total=16770 [2021-05-06 06:35:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-06 06:35:09,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-05-06 06:35:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.2191780821917808) internal successors, (445), 365 states have internal predecessors, (445), 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) [2021-05-06 06:35:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 449 transitions. [2021-05-06 06:35:09,897 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 449 transitions. Word has length 367 [2021-05-06 06:35:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:09,897 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 449 transitions. [2021-05-06 06:35:09,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 66 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 449 transitions. [2021-05-06 06:35:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-05-06 06:35:09,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:09,898 INFO L523 BasicCegarLoop]: trace histogram [121, 63, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:10,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-06 06:35:10,099 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:10,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1353457586, now seen corresponding path program 62 times [2021-05-06 06:35:10,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:10,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302925668] [2021-05-06 06:35:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:11,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17947 backedges. 7360 proven. 4032 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-06 06:35:11,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:11,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302925668] [2021-05-06 06:35:11,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302925668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:11,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123953241] [2021-05-06 06:35:11,735 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:11,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:35:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:35:11,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 06:35:11,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:35:11,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:11,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17947 backedges. 7360 proven. 4032 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-06 06:35:12,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123953241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:12,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:35:12,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 68 [2021-05-06 06:35:12,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404238713] [2021-05-06 06:35:12,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 06:35:12,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:12,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 06:35:12,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 06:35:12,255 INFO L87 Difference]: Start difference. First operand 370 states and 449 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:15,497 INFO L93 Difference]: Finished difference Result 372 states and 451 transitions. [2021-05-06 06:35:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-06 06:35:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 2 states have call successors, (4), 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 369 [2021-05-06 06:35:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:15,498 INFO L225 Difference]: With dead ends: 372 [2021-05-06 06:35:15,498 INFO L226 Difference]: Without dead ends: 372 [2021-05-06 06:35:15,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 4438.9ms TimeCoverageRelationStatistics Valid=6502, Invalid=10790, Unknown=0, NotChecked=0, Total=17292 [2021-05-06 06:35:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-05-06 06:35:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2021-05-06 06:35:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 367 states have (on average 1.2179836512261581) internal successors, (447), 367 states have internal predecessors, (447), 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) [2021-05-06 06:35:15,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 451 transitions. [2021-05-06 06:35:15,501 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 451 transitions. Word has length 369 [2021-05-06 06:35:15,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:15,501 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 451 transitions. [2021-05-06 06:35:15,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 67 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:15,502 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 451 transitions. [2021-05-06 06:35:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-05-06 06:35:15,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:15,503 INFO L523 BasicCegarLoop]: trace histogram [122, 64, 58, 58, 37, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:15,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:15,713 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:15,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:15,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2022034224, now seen corresponding path program 63 times [2021-05-06 06:35:15,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:15,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271745052] [2021-05-06 06:35:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:17,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18190 backedges. 7475 proven. 4160 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2021-05-06 06:35:17,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:17,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271745052] [2021-05-06 06:35:17,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271745052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:17,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712031920] [2021-05-06 06:35:17,396 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:17,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2021-05-06 06:35:17,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:35:17,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 06:35:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:35:17,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:17,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:17,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:17,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:17,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:17,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:17,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:17,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:18,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:19,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:19,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:19,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:19,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18190 backedges. 5912 proven. 882 refuted. 0 times theorem prover too weak. 11396 trivial. 0 not checked. [2021-05-06 06:35:19,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712031920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:19,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:35:19,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 24] total 90 [2021-05-06 06:35:19,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232027882] [2021-05-06 06:35:19,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 06:35:19,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:19,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 06:35:19,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 06:35:19,192 INFO L87 Difference]: Start difference. First operand 372 states and 451 transitions. Second operand has 90 states, 90 states have (on average 2.6222222222222222) internal successors, (236), 89 states have internal predecessors, (236), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:24,550 INFO L93 Difference]: Finished difference Result 380 states and 463 transitions. [2021-05-06 06:35:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 06:35:24,551 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.6222222222222222) internal successors, (236), 89 states have internal predecessors, (236), 2 states have call successors, (4), 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 371 [2021-05-06 06:35:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:24,551 INFO L225 Difference]: With dead ends: 380 [2021-05-06 06:35:24,551 INFO L226 Difference]: Without dead ends: 380 [2021-05-06 06:35:24,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 7701.7ms TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2021-05-06 06:35:24,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-06 06:35:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 378. [2021-05-06 06:35:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 373 states have (on average 1.2198391420911527) internal successors, (455), 373 states have internal predecessors, (455), 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) [2021-05-06 06:35:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 459 transitions. [2021-05-06 06:35:24,556 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 459 transitions. Word has length 371 [2021-05-06 06:35:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:24,556 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 459 transitions. [2021-05-06 06:35:24,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.6222222222222222) internal successors, (236), 89 states have internal predecessors, (236), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 459 transitions. [2021-05-06 06:35:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-05-06 06:35:24,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:24,557 INFO L523 BasicCegarLoop]: trace histogram [124, 65, 59, 59, 37, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:24,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-06 06:35:24,758 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:24,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1836810727, now seen corresponding path program 64 times [2021-05-06 06:35:24,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:24,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017489704] [2021-05-06 06:35:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:26,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18798 backedges. 7722 proven. 4290 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2021-05-06 06:35:26,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:26,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017489704] [2021-05-06 06:35:26,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017489704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:26,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672722927] [2021-05-06 06:35:26,483 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:26,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:35:26,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:35:26,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 06:35:26,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:35:26,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:26,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18798 backedges. 7722 proven. 4290 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2021-05-06 06:35:27,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672722927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:27,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:35:27,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68] total 70 [2021-05-06 06:35:27,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115423042] [2021-05-06 06:35:27,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 06:35:27,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:27,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 06:35:27,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 06:35:27,019 INFO L87 Difference]: Start difference. First operand 378 states and 459 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:30,297 INFO L93 Difference]: Finished difference Result 380 states and 461 transitions. [2021-05-06 06:35:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-06 06:35:30,298 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 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 377 [2021-05-06 06:35:30,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:30,299 INFO L225 Difference]: With dead ends: 380 [2021-05-06 06:35:30,299 INFO L226 Difference]: Without dead ends: 380 [2021-05-06 06:35:30,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 4668.6ms TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2021-05-06 06:35:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-06 06:35:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2021-05-06 06:35:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.2186666666666666) internal successors, (457), 375 states have internal predecessors, (457), 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) [2021-05-06 06:35:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 461 transitions. [2021-05-06 06:35:30,303 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 461 transitions. Word has length 377 [2021-05-06 06:35:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:30,303 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 461 transitions. [2021-05-06 06:35:30,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:30,303 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 461 transitions. [2021-05-06 06:35:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2021-05-06 06:35:30,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:30,305 INFO L523 BasicCegarLoop]: trace histogram [125, 66, 59, 59, 37, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:30,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-06 06:35:30,529 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:30,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:30,529 INFO L82 PathProgramCache]: Analyzing trace with hash -211183355, now seen corresponding path program 65 times [2021-05-06 06:35:30,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:30,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443798736] [2021-05-06 06:35:30,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:32,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 19047 backedges. 7839 proven. 4422 refuted. 0 times theorem prover too weak. 6786 trivial. 0 not checked. [2021-05-06 06:35:32,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:32,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443798736] [2021-05-06 06:35:32,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443798736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:32,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120675136] [2021-05-06 06:35:32,443 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:32,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2021-05-06 06:35:32,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:35:32,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 06:35:32,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:35:32,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:32,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:33,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:34,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 19047 backedges. 11250 proven. 3009 refuted. 0 times theorem prover too weak. 4788 trivial. 0 not checked. [2021-05-06 06:35:35,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120675136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:35,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:35:35,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 43] total 111 [2021-05-06 06:35:35,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571802186] [2021-05-06 06:35:35,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-06 06:35:35,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:35,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-06 06:35:35,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-06 06:35:35,673 INFO L87 Difference]: Start difference. First operand 380 states and 461 transitions. Second operand has 111 states, 111 states have (on average 2.774774774774775) internal successors, (308), 110 states have internal predecessors, (308), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:43,616 INFO L93 Difference]: Finished difference Result 398 states and 483 transitions. [2021-05-06 06:35:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-06 06:35:43,616 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.774774774774775) internal successors, (308), 110 states have internal predecessors, (308), 2 states have call successors, (4), 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 379 [2021-05-06 06:35:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:43,617 INFO L225 Difference]: With dead ends: 398 [2021-05-06 06:35:43,617 INFO L226 Difference]: Without dead ends: 398 [2021-05-06 06:35:43,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5844 ImplicationChecksByTransitivity, 11589.4ms TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2021-05-06 06:35:43,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-06 06:35:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-05-06 06:35:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 393 states have (on average 1.2188295165394403) internal successors, (479), 393 states have internal predecessors, (479), 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) [2021-05-06 06:35:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 483 transitions. [2021-05-06 06:35:43,622 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 483 transitions. Word has length 379 [2021-05-06 06:35:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:43,622 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 483 transitions. [2021-05-06 06:35:43,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.774774774774775) internal successors, (308), 110 states have internal predecessors, (308), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 483 transitions. [2021-05-06 06:35:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-05-06 06:35:43,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:43,623 INFO L523 BasicCegarLoop]: trace histogram [130, 67, 63, 63, 41, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:43,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-06 06:35:43,825 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:43,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1147778173, now seen corresponding path program 66 times [2021-05-06 06:35:43,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:43,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522068015] [2021-05-06 06:35:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:45,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20806 backedges. 8500 proven. 4556 refuted. 0 times theorem prover too weak. 7750 trivial. 0 not checked. [2021-05-06 06:35:45,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:45,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522068015] [2021-05-06 06:35:45,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522068015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:45,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821106895] [2021-05-06 06:35:45,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:45,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2021-05-06 06:35:45,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:35:45,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 06:35:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:35:46,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:46,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20806 backedges. 6682 proven. 968 refuted. 0 times theorem prover too weak. 13156 trivial. 0 not checked. [2021-05-06 06:35:47,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821106895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:47,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:35:47,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 25] total 94 [2021-05-06 06:35:47,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248077816] [2021-05-06 06:35:47,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 06:35:47,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:47,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 06:35:47,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 06:35:47,675 INFO L87 Difference]: Start difference. First operand 398 states and 483 transitions. Second operand has 94 states, 94 states have (on average 2.617021276595745) internal successors, (246), 93 states have internal predecessors, (246), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:53,480 INFO L93 Difference]: Finished difference Result 406 states and 495 transitions. [2021-05-06 06:35:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-06 06:35:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.617021276595745) internal successors, (246), 93 states have internal predecessors, (246), 2 states have call successors, (4), 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 397 [2021-05-06 06:35:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:53,481 INFO L225 Difference]: With dead ends: 406 [2021-05-06 06:35:53,481 INFO L226 Difference]: Without dead ends: 406 [2021-05-06 06:35:53,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4162 ImplicationChecksByTransitivity, 8345.0ms TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2021-05-06 06:35:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-06 06:35:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 404. [2021-05-06 06:35:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 399 states have (on average 1.2205513784461153) internal successors, (487), 399 states have internal predecessors, (487), 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) [2021-05-06 06:35:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 491 transitions. [2021-05-06 06:35:53,485 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 491 transitions. Word has length 397 [2021-05-06 06:35:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:53,485 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 491 transitions. [2021-05-06 06:35:53,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.617021276595745) internal successors, (246), 93 states have internal predecessors, (246), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 491 transitions. [2021-05-06 06:35:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-05-06 06:35:53,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:53,487 INFO L523 BasicCegarLoop]: trace histogram [132, 68, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:53,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:53,687 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:53,688 INFO L82 PathProgramCache]: Analyzing trace with hash -371991142, now seen corresponding path program 67 times [2021-05-06 06:35:53,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:53,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364253848] [2021-05-06 06:35:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:55,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:35:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21456 backedges. 8763 proven. 4692 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-06 06:35:55,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:35:55,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364253848] [2021-05-06 06:35:55,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364253848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:55,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379860047] [2021-05-06 06:35:55,562 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:35:55,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-06 06:35:55,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:35:55,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:55,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:35:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 21456 backedges. 8763 proven. 4692 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-06 06:35:56,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379860047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:35:56,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:35:56,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71] total 73 [2021-05-06 06:35:56,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994338668] [2021-05-06 06:35:56,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-06 06:35:56,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:35:56,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-06 06:35:56,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 06:35:56,144 INFO L87 Difference]: Start difference. First operand 404 states and 491 transitions. Second operand has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:35:59,675 INFO L93 Difference]: Finished difference Result 406 states and 493 transitions. [2021-05-06 06:35:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 06:35:59,675 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (4), 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 403 [2021-05-06 06:35:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:35:59,677 INFO L225 Difference]: With dead ends: 406 [2021-05-06 06:35:59,677 INFO L226 Difference]: Without dead ends: 406 [2021-05-06 06:35:59,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 5030.1ms TimeCoverageRelationStatistics Valid=7527, Invalid=12495, Unknown=0, NotChecked=0, Total=20022 [2021-05-06 06:35:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-06 06:35:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2021-05-06 06:35:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 401 states have (on average 1.2194513715710724) internal successors, (489), 401 states have internal predecessors, (489), 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) [2021-05-06 06:35:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 493 transitions. [2021-05-06 06:35:59,681 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 493 transitions. Word has length 403 [2021-05-06 06:35:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:35:59,681 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 493 transitions. [2021-05-06 06:35:59,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 72 states have internal predecessors, (154), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:35:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 493 transitions. [2021-05-06 06:35:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-05-06 06:35:59,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:35:59,683 INFO L523 BasicCegarLoop]: trace histogram [133, 69, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:35:59,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:35:59,883 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:35:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:35:59,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1035785416, now seen corresponding path program 68 times [2021-05-06 06:35:59,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:35:59,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619510066] [2021-05-06 06:35:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:35:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:01,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:36:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21721 backedges. 8890 proven. 4830 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-06 06:36:01,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:36:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619510066] [2021-05-06 06:36:01,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619510066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647884840] [2021-05-06 06:36:01,804 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:01,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:36:01,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:36:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-06 06:36:01,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:36:01,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:01,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21721 backedges. 8890 proven. 4830 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-06 06:36:02,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647884840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:02,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:36:02,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 74 [2021-05-06 06:36:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705791630] [2021-05-06 06:36:02,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 06:36:02,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:36:02,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 06:36:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 06:36:02,398 INFO L87 Difference]: Start difference. First operand 406 states and 493 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:36:05,964 INFO L93 Difference]: Finished difference Result 408 states and 495 transitions. [2021-05-06 06:36:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-06 06:36:05,964 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (4), 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 405 [2021-05-06 06:36:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:36:05,965 INFO L225 Difference]: With dead ends: 408 [2021-05-06 06:36:05,965 INFO L226 Difference]: Without dead ends: 408 [2021-05-06 06:36:05,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2688 ImplicationChecksByTransitivity, 5163.0ms TimeCoverageRelationStatistics Valid=7741, Invalid=12851, Unknown=0, NotChecked=0, Total=20592 [2021-05-06 06:36:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-06 06:36:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2021-05-06 06:36:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 403 states have (on average 1.218362282878412) internal successors, (491), 403 states have internal predecessors, (491), 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) [2021-05-06 06:36:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 495 transitions. [2021-05-06 06:36:05,970 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 495 transitions. Word has length 405 [2021-05-06 06:36:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:36:05,971 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 495 transitions. [2021-05-06 06:36:05,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 495 transitions. [2021-05-06 06:36:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-05-06 06:36:05,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:36:05,973 INFO L523 BasicCegarLoop]: trace histogram [134, 70, 64, 64, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:36:06,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:06,197 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:36:06,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:36:06,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1008044374, now seen corresponding path program 69 times [2021-05-06 06:36:06,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:36:06,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012904155] [2021-05-06 06:36:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:36:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:08,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:36:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21988 backedges. 9017 proven. 4970 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2021-05-06 06:36:08,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:36:08,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012904155] [2021-05-06 06:36:08,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012904155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:08,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125045024] [2021-05-06 06:36:08,177 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:08,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-05-06 06:36:08,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:36:08,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 06:36:08,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:36:08,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:08,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:09,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:10,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:10,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:10,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:10,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:10,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:10,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21988 backedges. 7120 proven. 1058 refuted. 0 times theorem prover too weak. 13810 trivial. 0 not checked. [2021-05-06 06:36:10,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125045024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:10,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:36:10,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 26] total 98 [2021-05-06 06:36:10,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77937833] [2021-05-06 06:36:10,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-06 06:36:10,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:36:10,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-06 06:36:10,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 06:36:10,235 INFO L87 Difference]: Start difference. First operand 408 states and 495 transitions. Second operand has 98 states, 98 states have (on average 2.6122448979591835) internal successors, (256), 97 states have internal predecessors, (256), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:36:16,613 INFO L93 Difference]: Finished difference Result 416 states and 507 transitions. [2021-05-06 06:36:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-06 06:36:16,613 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.6122448979591835) internal successors, (256), 97 states have internal predecessors, (256), 2 states have call successors, (4), 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 407 [2021-05-06 06:36:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:36:16,614 INFO L225 Difference]: With dead ends: 416 [2021-05-06 06:36:16,614 INFO L226 Difference]: Without dead ends: 416 [2021-05-06 06:36:16,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4535 ImplicationChecksByTransitivity, 9120.8ms TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2021-05-06 06:36:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-06 06:36:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2021-05-06 06:36:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 409 states have (on average 1.2200488997555012) internal successors, (499), 409 states have internal predecessors, (499), 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) [2021-05-06 06:36:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 503 transitions. [2021-05-06 06:36:16,619 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 503 transitions. Word has length 407 [2021-05-06 06:36:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:36:16,619 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 503 transitions. [2021-05-06 06:36:16,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.6122448979591835) internal successors, (256), 97 states have internal predecessors, (256), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 503 transitions. [2021-05-06 06:36:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-05-06 06:36:16,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:36:16,621 INFO L523 BasicCegarLoop]: trace histogram [136, 71, 65, 65, 41, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:36:16,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-06 06:36:16,821 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:36:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:36:16,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1701401491, now seen corresponding path program 70 times [2021-05-06 06:36:16,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:36:16,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231723384] [2021-05-06 06:36:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:36:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:18,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:36:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22656 backedges. 9288 proven. 5112 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2021-05-06 06:36:18,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:36:18,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231723384] [2021-05-06 06:36:18,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231723384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:18,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229426850] [2021-05-06 06:36:18,979 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:19,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:36:19,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:36:19,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-06 06:36:19,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:36:19,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 22656 backedges. 9288 proven. 5112 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2021-05-06 06:36:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229426850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:19,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:36:19,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74] total 76 [2021-05-06 06:36:19,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937738800] [2021-05-06 06:36:19,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 06:36:19,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:36:19,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 06:36:19,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 06:36:19,612 INFO L87 Difference]: Start difference. First operand 414 states and 503 transitions. Second operand has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:36:23,358 INFO L93 Difference]: Finished difference Result 416 states and 505 transitions. [2021-05-06 06:36:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-06 06:36:23,358 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (4), 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 413 [2021-05-06 06:36:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:36:23,359 INFO L225 Difference]: With dead ends: 416 [2021-05-06 06:36:23,359 INFO L226 Difference]: Without dead ends: 416 [2021-05-06 06:36:23,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 5526.9ms TimeCoverageRelationStatistics Valid=8178, Invalid=13578, Unknown=0, NotChecked=0, Total=21756 [2021-05-06 06:36:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-06 06:36:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2021-05-06 06:36:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 411 states have (on average 1.218978102189781) internal successors, (501), 411 states have internal predecessors, (501), 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) [2021-05-06 06:36:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 505 transitions. [2021-05-06 06:36:23,362 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 505 transitions. Word has length 413 [2021-05-06 06:36:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:36:23,363 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 505 transitions. [2021-05-06 06:36:23,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 75 states have internal predecessors, (160), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 505 transitions. [2021-05-06 06:36:23,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2021-05-06 06:36:23,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:36:23,364 INFO L523 BasicCegarLoop]: trace histogram [137, 72, 65, 65, 41, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:36:23,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:23,584 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:36:23,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:36:23,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1557132149, now seen corresponding path program 71 times [2021-05-06 06:36:23,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:36:23,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608933909] [2021-05-06 06:36:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:36:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:25,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:36:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22929 backedges. 9417 proven. 5256 refuted. 0 times theorem prover too weak. 8256 trivial. 0 not checked. [2021-05-06 06:36:25,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:36:25,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608933909] [2021-05-06 06:36:25,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608933909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:25,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367413381] [2021-05-06 06:36:25,656 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:25,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2021-05-06 06:36:25,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:36:25,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 06:36:25,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:36:25,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:25,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:25,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:26,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:27,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:28,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 22929 backedges. 13518 proven. 3661 refuted. 0 times theorem prover too weak. 5750 trivial. 0 not checked. [2021-05-06 06:36:29,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367413381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:29,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:36:29,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 47] total 121 [2021-05-06 06:36:29,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746308854] [2021-05-06 06:36:29,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-06 06:36:29,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:36:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-06 06:36:29,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-06 06:36:29,535 INFO L87 Difference]: Start difference. First operand 416 states and 505 transitions. Second operand has 121 states, 121 states have (on average 2.7768595041322315) internal successors, (336), 120 states have internal predecessors, (336), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:36:38,741 INFO L93 Difference]: Finished difference Result 434 states and 527 transitions. [2021-05-06 06:36:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-06 06:36:38,741 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.7768595041322315) internal successors, (336), 120 states have internal predecessors, (336), 2 states have call successors, (4), 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 415 [2021-05-06 06:36:38,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:36:38,742 INFO L225 Difference]: With dead ends: 434 [2021-05-06 06:36:38,742 INFO L226 Difference]: Without dead ends: 434 [2021-05-06 06:36:38,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6975 ImplicationChecksByTransitivity, 13576.0ms TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2021-05-06 06:36:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-05-06 06:36:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2021-05-06 06:36:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 429 states have (on average 1.219114219114219) internal successors, (523), 429 states have internal predecessors, (523), 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) [2021-05-06 06:36:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 527 transitions. [2021-05-06 06:36:38,747 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 527 transitions. Word has length 415 [2021-05-06 06:36:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:36:38,747 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 527 transitions. [2021-05-06 06:36:38,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.7768595041322315) internal successors, (336), 120 states have internal predecessors, (336), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 527 transitions. [2021-05-06 06:36:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-05-06 06:36:38,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:36:38,749 INFO L523 BasicCegarLoop]: trace histogram [142, 73, 69, 69, 45, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:36:38,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:38,950 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:36:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:36:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1231568905, now seen corresponding path program 72 times [2021-05-06 06:36:38,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:36:38,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470154007] [2021-05-06 06:36:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:36:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:41,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:36:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24856 backedges. 10138 proven. 5402 refuted. 0 times theorem prover too weak. 9316 trivial. 0 not checked. [2021-05-06 06:36:41,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:36:41,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470154007] [2021-05-06 06:36:41,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470154007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:41,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390278472] [2021-05-06 06:36:41,080 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:41,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 99 check-sat command(s) [2021-05-06 06:36:41,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:36:41,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 06:36:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:36:41,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:41,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:42,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:43,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:43,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:43,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:43,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:43,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:43,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:43,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:43,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24856 backedges. 7962 proven. 1152 refuted. 0 times theorem prover too weak. 15742 trivial. 0 not checked. [2021-05-06 06:36:43,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390278472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:43,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:36:43,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 27] total 102 [2021-05-06 06:36:43,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365017944] [2021-05-06 06:36:43,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-06 06:36:43,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:36:43,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-06 06:36:43,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-06 06:36:43,353 INFO L87 Difference]: Start difference. First operand 434 states and 527 transitions. Second operand has 102 states, 102 states have (on average 2.607843137254902) internal successors, (266), 101 states have internal predecessors, (266), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:36:50,271 INFO L93 Difference]: Finished difference Result 442 states and 539 transitions. [2021-05-06 06:36:50,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-06 06:36:50,271 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.607843137254902) internal successors, (266), 101 states have internal predecessors, (266), 2 states have call successors, (4), 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 433 [2021-05-06 06:36:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:36:50,272 INFO L225 Difference]: With dead ends: 442 [2021-05-06 06:36:50,272 INFO L226 Difference]: Without dead ends: 442 [2021-05-06 06:36:50,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4924 ImplicationChecksByTransitivity, 9881.6ms TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2021-05-06 06:36:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-06 06:36:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2021-05-06 06:36:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 435 states have (on average 1.2206896551724138) internal successors, (531), 435 states have internal predecessors, (531), 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) [2021-05-06 06:36:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 535 transitions. [2021-05-06 06:36:50,277 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 535 transitions. Word has length 433 [2021-05-06 06:36:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:36:50,277 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 535 transitions. [2021-05-06 06:36:50,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.607843137254902) internal successors, (266), 101 states have internal predecessors, (266), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 535 transitions. [2021-05-06 06:36:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-05-06 06:36:50,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:36:50,279 INFO L523 BasicCegarLoop]: trace histogram [144, 74, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:36:50,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:50,480 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:36:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:36:50,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1418487840, now seen corresponding path program 73 times [2021-05-06 06:36:50,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:36:50,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550781316] [2021-05-06 06:36:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:36:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:52,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:36:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25566 backedges. 10425 proven. 5550 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-06 06:36:52,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:36:52,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550781316] [2021-05-06 06:36:52,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550781316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:52,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760248893] [2021-05-06 06:36:52,683 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:52,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 06:36:52,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:36:52,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:52,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 25566 backedges. 10425 proven. 5550 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-06 06:36:53,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760248893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:53,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:36:53,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77] total 79 [2021-05-06 06:36:53,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448836278] [2021-05-06 06:36:53,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-06 06:36:53,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:36:53,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-06 06:36:53,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 06:36:53,298 INFO L87 Difference]: Start difference. First operand 440 states and 535 transitions. Second operand has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:36:57,289 INFO L93 Difference]: Finished difference Result 442 states and 537 transitions. [2021-05-06 06:36:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 06:36:57,289 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (4), 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 439 [2021-05-06 06:36:57,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:36:57,290 INFO L225 Difference]: With dead ends: 442 [2021-05-06 06:36:57,290 INFO L226 Difference]: Without dead ends: 442 [2021-05-06 06:36:57,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 5844.6ms TimeCoverageRelationStatistics Valid=8856, Invalid=14706, Unknown=0, NotChecked=0, Total=23562 [2021-05-06 06:36:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-06 06:36:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-05-06 06:36:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.2196796338672768) internal successors, (533), 437 states have internal predecessors, (533), 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) [2021-05-06 06:36:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 537 transitions. [2021-05-06 06:36:57,294 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 537 transitions. Word has length 439 [2021-05-06 06:36:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:36:57,294 INFO L480 AbstractCegarLoop]: Abstraction has 442 states and 537 transitions. [2021-05-06 06:36:57,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 78 states have internal predecessors, (166), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:36:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 537 transitions. [2021-05-06 06:36:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-05-06 06:36:57,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:36:57,296 INFO L523 BasicCegarLoop]: trace histogram [145, 75, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:36:57,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-06 06:36:57,496 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:36:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:36:57,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2108538558, now seen corresponding path program 74 times [2021-05-06 06:36:57,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:36:57,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871394682] [2021-05-06 06:36:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:36:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:59,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:36:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:36:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 25855 backedges. 10564 proven. 5700 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-06 06:36:59,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:36:59,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871394682] [2021-05-06 06:36:59,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871394682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:36:59,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650786062] [2021-05-06 06:36:59,735 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:36:59,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:36:59,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:36:59,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-06 06:36:59,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:36:59,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:36:59,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25855 backedges. 10564 proven. 5700 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-06 06:37:00,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650786062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:00,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:37:00,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 80 [2021-05-06 06:37:00,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439227167] [2021-05-06 06:37:00,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 06:37:00,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:37:00,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 06:37:00,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 06:37:00,381 INFO L87 Difference]: Start difference. First operand 442 states and 537 transitions. Second operand has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:37:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:37:04,461 INFO L93 Difference]: Finished difference Result 444 states and 539 transitions. [2021-05-06 06:37:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-06 06:37:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (4), 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 441 [2021-05-06 06:37:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:37:04,462 INFO L225 Difference]: With dead ends: 444 [2021-05-06 06:37:04,462 INFO L226 Difference]: Without dead ends: 444 [2021-05-06 06:37:04,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 5968.8ms TimeCoverageRelationStatistics Valid=9088, Invalid=15092, Unknown=0, NotChecked=0, Total=24180 [2021-05-06 06:37:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-06 06:37:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2021-05-06 06:37:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 439 states have (on average 1.2186788154897494) internal successors, (535), 439 states have internal predecessors, (535), 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) [2021-05-06 06:37:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 539 transitions. [2021-05-06 06:37:04,469 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 539 transitions. Word has length 441 [2021-05-06 06:37:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:37:04,469 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 539 transitions. [2021-05-06 06:37:04,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.1) internal successors, (168), 79 states have internal predecessors, (168), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:37:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 539 transitions. [2021-05-06 06:37:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-05-06 06:37:04,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:37:04,472 INFO L523 BasicCegarLoop]: trace histogram [146, 76, 70, 70, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:37:04,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:37:04,693 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:37:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:37:04,693 INFO L82 PathProgramCache]: Analyzing trace with hash -472652324, now seen corresponding path program 75 times [2021-05-06 06:37:04,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:37:04,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790535290] [2021-05-06 06:37:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:37:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:07,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:37:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 26146 backedges. 10703 proven. 5852 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2021-05-06 06:37:07,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:37:07,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790535290] [2021-05-06 06:37:07,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790535290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:07,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467829920] [2021-05-06 06:37:07,087 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:37:07,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-06 06:37:07,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:37:07,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 06:37:07,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:37:07,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:07,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:08,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 26146 backedges. 8440 proven. 1250 refuted. 0 times theorem prover too weak. 16456 trivial. 0 not checked. [2021-05-06 06:37:09,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467829920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:09,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:37:09,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 28] total 106 [2021-05-06 06:37:09,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922905640] [2021-05-06 06:37:09,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-06 06:37:09,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:37:09,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-06 06:37:09,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 06:37:09,418 INFO L87 Difference]: Start difference. First operand 444 states and 539 transitions. Second operand has 106 states, 106 states have (on average 2.6037735849056602) internal successors, (276), 105 states have internal predecessors, (276), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:37:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:37:16,574 INFO L93 Difference]: Finished difference Result 452 states and 551 transitions. [2021-05-06 06:37:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-06 06:37:16,575 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.6037735849056602) internal successors, (276), 105 states have internal predecessors, (276), 2 states have call successors, (4), 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 443 [2021-05-06 06:37:16,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:37:16,576 INFO L225 Difference]: With dead ends: 452 [2021-05-06 06:37:16,576 INFO L226 Difference]: Without dead ends: 452 [2021-05-06 06:37:16,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5329 ImplicationChecksByTransitivity, 10488.6ms TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2021-05-06 06:37:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-06 06:37:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2021-05-06 06:37:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 445 states have (on average 1.2202247191011235) internal successors, (543), 445 states have internal predecessors, (543), 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) [2021-05-06 06:37:16,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 547 transitions. [2021-05-06 06:37:16,580 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 547 transitions. Word has length 443 [2021-05-06 06:37:16,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:37:16,580 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 547 transitions. [2021-05-06 06:37:16,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.6037735849056602) internal successors, (276), 105 states have internal predecessors, (276), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:37:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 547 transitions. [2021-05-06 06:37:16,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2021-05-06 06:37:16,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:37:16,582 INFO L523 BasicCegarLoop]: trace histogram [148, 77, 71, 71, 45, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:37:16,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-06 06:37:16,783 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:37:16,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:37:16,783 INFO L82 PathProgramCache]: Analyzing trace with hash 834690803, now seen corresponding path program 76 times [2021-05-06 06:37:16,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:37:16,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546439964] [2021-05-06 06:37:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:37:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:19,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:37:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26874 backedges. 10998 proven. 6006 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2021-05-06 06:37:19,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:37:19,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546439964] [2021-05-06 06:37:19,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546439964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:19,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38969080] [2021-05-06 06:37:19,154 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:37:19,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:37:19,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:37:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-06 06:37:19,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:37:19,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 26874 backedges. 10998 proven. 6006 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2021-05-06 06:37:19,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38969080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:19,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:37:19,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 82 [2021-05-06 06:37:19,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567123398] [2021-05-06 06:37:19,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 06:37:19,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:37:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 06:37:19,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 06:37:19,781 INFO L87 Difference]: Start difference. First operand 450 states and 547 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:37:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:37:24,055 INFO L93 Difference]: Finished difference Result 452 states and 549 transitions. [2021-05-06 06:37:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-06 06:37:24,055 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 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 449 [2021-05-06 06:37:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:37:24,056 INFO L225 Difference]: With dead ends: 452 [2021-05-06 06:37:24,056 INFO L226 Difference]: Without dead ends: 452 [2021-05-06 06:37:24,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 6256.8ms TimeCoverageRelationStatistics Valid=9561, Invalid=15879, Unknown=0, NotChecked=0, Total=25440 [2021-05-06 06:37:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-06 06:37:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2021-05-06 06:37:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 447 states have (on average 1.2192393736017897) internal successors, (545), 447 states have internal predecessors, (545), 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) [2021-05-06 06:37:24,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 549 transitions. [2021-05-06 06:37:24,060 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 549 transitions. Word has length 449 [2021-05-06 06:37:24,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:37:24,060 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 549 transitions. [2021-05-06 06:37:24,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:37:24,061 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 549 transitions. [2021-05-06 06:37:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-05-06 06:37:24,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:37:24,063 INFO L523 BasicCegarLoop]: trace histogram [149, 78, 71, 71, 45, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:37:24,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:37:24,266 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:37:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:37:24,266 INFO L82 PathProgramCache]: Analyzing trace with hash -556496879, now seen corresponding path program 77 times [2021-05-06 06:37:24,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:37:24,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762044647] [2021-05-06 06:37:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:37:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:26,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:37:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 27171 backedges. 11139 proven. 6162 refuted. 0 times theorem prover too weak. 9870 trivial. 0 not checked. [2021-05-06 06:37:26,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:37:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762044647] [2021-05-06 06:37:26,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762044647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976951619] [2021-05-06 06:37:26,650 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:37:26,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 99 check-sat command(s) [2021-05-06 06:37:26,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:37:26,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 06:37:26,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:37:26,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:26,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:27,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:28,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:29,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:30,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 27171 backedges. 15994 proven. 4377 refuted. 0 times theorem prover too weak. 6800 trivial. 0 not checked. [2021-05-06 06:37:31,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976951619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:31,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:37:31,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 51] total 131 [2021-05-06 06:37:31,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328339882] [2021-05-06 06:37:31,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-06 06:37:31,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:37:31,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-06 06:37:31,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-06 06:37:31,029 INFO L87 Difference]: Start difference. First operand 452 states and 549 transitions. Second operand has 131 states, 131 states have (on average 2.7786259541984735) internal successors, (364), 130 states have internal predecessors, (364), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:37:41,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:37:41,666 INFO L93 Difference]: Finished difference Result 470 states and 571 transitions. [2021-05-06 06:37:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-06 06:37:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.7786259541984735) internal successors, (364), 130 states have internal predecessors, (364), 2 states have call successors, (4), 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 451 [2021-05-06 06:37:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:37:41,667 INFO L225 Difference]: With dead ends: 470 [2021-05-06 06:37:41,667 INFO L226 Difference]: Without dead ends: 470 [2021-05-06 06:37:41,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8206 ImplicationChecksByTransitivity, 15604.5ms TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2021-05-06 06:37:41,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-06 06:37:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2021-05-06 06:37:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.2193548387096773) internal successors, (567), 465 states have internal predecessors, (567), 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) [2021-05-06 06:37:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 571 transitions. [2021-05-06 06:37:41,672 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 571 transitions. Word has length 451 [2021-05-06 06:37:41,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:37:41,672 INFO L480 AbstractCegarLoop]: Abstraction has 470 states and 571 transitions. [2021-05-06 06:37:41,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.7786259541984735) internal successors, (364), 130 states have internal predecessors, (364), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:37:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 571 transitions. [2021-05-06 06:37:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-05-06 06:37:41,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:37:41,674 INFO L523 BasicCegarLoop]: trace histogram [154, 79, 75, 75, 49, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:37:41,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:37:41,875 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:37:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:37:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash 611564687, now seen corresponding path program 78 times [2021-05-06 06:37:41,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:37:41,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100255001] [2021-05-06 06:37:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:37:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:44,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:37:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 29266 backedges. 11920 proven. 6320 refuted. 0 times theorem prover too weak. 11026 trivial. 0 not checked. [2021-05-06 06:37:44,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:37:44,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100255001] [2021-05-06 06:37:44,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100255001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:44,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697090885] [2021-05-06 06:37:44,361 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:37:44,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 107 check-sat command(s) [2021-05-06 06:37:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:37:44,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 06:37:44,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:37:44,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:44,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:45,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 29266 backedges. 9354 proven. 1352 refuted. 0 times theorem prover too weak. 18560 trivial. 0 not checked. [2021-05-06 06:37:46,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697090885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:46,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:37:46,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 29] total 110 [2021-05-06 06:37:46,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831688074] [2021-05-06 06:37:46,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-06 06:37:46,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:37:46,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-06 06:37:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-06 06:37:46,972 INFO L87 Difference]: Start difference. First operand 470 states and 571 transitions. Second operand has 110 states, 110 states have (on average 2.6) internal successors, (286), 109 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:37:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:37:54,611 INFO L93 Difference]: Finished difference Result 478 states and 583 transitions. [2021-05-06 06:37:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-06 06:37:54,611 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.6) internal successors, (286), 109 states have internal predecessors, (286), 2 states have call successors, (4), 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 469 [2021-05-06 06:37:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:37:54,612 INFO L225 Difference]: With dead ends: 478 [2021-05-06 06:37:54,613 INFO L226 Difference]: Without dead ends: 478 [2021-05-06 06:37:54,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5750 ImplicationChecksByTransitivity, 11224.2ms TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2021-05-06 06:37:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-06 06:37:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 476. [2021-05-06 06:37:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 1.2208067940552016) internal successors, (575), 471 states have internal predecessors, (575), 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) [2021-05-06 06:37:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 579 transitions. [2021-05-06 06:37:54,617 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 579 transitions. Word has length 469 [2021-05-06 06:37:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:37:54,617 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 579 transitions. [2021-05-06 06:37:54,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.6) internal successors, (286), 109 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:37:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 579 transitions. [2021-05-06 06:37:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2021-05-06 06:37:54,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:37:54,620 INFO L523 BasicCegarLoop]: trace histogram [156, 80, 76, 76, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:37:54,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:37:54,843 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:37:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:37:54,843 INFO L82 PathProgramCache]: Analyzing trace with hash -808846682, now seen corresponding path program 79 times [2021-05-06 06:37:54,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:37:54,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095197858] [2021-05-06 06:37:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:37:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:57,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:37:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30036 backedges. 12231 proven. 6480 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-06 06:37:57,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:37:57,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095197858] [2021-05-06 06:37:57,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095197858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:57,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208379832] [2021-05-06 06:37:57,481 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:37:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:37:57,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 82 conjunts are in the unsatisfiable core [2021-05-06 06:37:57,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:37:57,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:57,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:37:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30036 backedges. 12231 proven. 6480 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-06 06:37:58,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208379832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:37:58,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:37:58,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83] total 85 [2021-05-06 06:37:58,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272463184] [2021-05-06 06:37:58,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-06 06:37:58,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:37:58,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-06 06:37:58,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 06:37:58,129 INFO L87 Difference]: Start difference. First operand 476 states and 579 transitions. Second operand has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:38:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:38:02,688 INFO L93 Difference]: Finished difference Result 478 states and 581 transitions. [2021-05-06 06:38:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 06:38:02,689 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (4), 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 475 [2021-05-06 06:38:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:38:02,690 INFO L225 Difference]: With dead ends: 478 [2021-05-06 06:38:02,690 INFO L226 Difference]: Without dead ends: 478 [2021-05-06 06:38:02,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 6775.7ms TimeCoverageRelationStatistics Valid=10293, Invalid=17097, Unknown=0, NotChecked=0, Total=27390 [2021-05-06 06:38:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-06 06:38:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2021-05-06 06:38:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 473 states have (on average 1.2198731501057083) internal successors, (577), 473 states have internal predecessors, (577), 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) [2021-05-06 06:38:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 581 transitions. [2021-05-06 06:38:02,694 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 581 transitions. Word has length 475 [2021-05-06 06:38:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:38:02,694 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 581 transitions. [2021-05-06 06:38:02,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 84 states have internal predecessors, (178), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:38:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 581 transitions. [2021-05-06 06:38:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-05-06 06:38:02,696 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:38:02,696 INFO L523 BasicCegarLoop]: trace histogram [157, 81, 76, 76, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:38:02,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:38:02,897 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:38:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:38:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1057806916, now seen corresponding path program 80 times [2021-05-06 06:38:02,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:38:02,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621469239] [2021-05-06 06:38:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:38:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:38:05,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:38:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:38:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30349 backedges. 12382 proven. 6642 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-06 06:38:05,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:38:05,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621469239] [2021-05-06 06:38:05,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621469239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:38:05,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98855443] [2021-05-06 06:38:05,478 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:38:05,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:38:05,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:38:05,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-06 06:38:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:38:05,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:05,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 30349 backedges. 12382 proven. 6642 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-06 06:38:06,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98855443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:38:06,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:38:06,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84] total 86 [2021-05-06 06:38:06,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195085570] [2021-05-06 06:38:06,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 06:38:06,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:38:06,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 06:38:06,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 06:38:06,175 INFO L87 Difference]: Start difference. First operand 478 states and 581 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:38:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:38:10,876 INFO L93 Difference]: Finished difference Result 480 states and 583 transitions. [2021-05-06 06:38:10,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-06 06:38:10,876 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 2 states have call successors, (4), 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 477 [2021-05-06 06:38:10,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:38:10,877 INFO L225 Difference]: With dead ends: 480 [2021-05-06 06:38:10,877 INFO L226 Difference]: Without dead ends: 480 [2021-05-06 06:38:10,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3642 ImplicationChecksByTransitivity, 6839.6ms TimeCoverageRelationStatistics Valid=10543, Invalid=17513, Unknown=0, NotChecked=0, Total=28056 [2021-05-06 06:38:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-05-06 06:38:10,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 480. [2021-05-06 06:38:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 475 states have (on average 1.2189473684210526) internal successors, (579), 475 states have internal predecessors, (579), 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) [2021-05-06 06:38:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 583 transitions. [2021-05-06 06:38:10,882 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 583 transitions. Word has length 477 [2021-05-06 06:38:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:38:10,882 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 583 transitions. [2021-05-06 06:38:10,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:38:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 583 transitions. [2021-05-06 06:38:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-05-06 06:38:10,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:38:10,884 INFO L523 BasicCegarLoop]: trace histogram [158, 82, 76, 76, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:38:11,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:38:11,085 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:38:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:38:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -384415134, now seen corresponding path program 81 times [2021-05-06 06:38:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:38:11,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959970079] [2021-05-06 06:38:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:38:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:38:13,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:38:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:38:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30664 backedges. 12533 proven. 6806 refuted. 0 times theorem prover too weak. 11325 trivial. 0 not checked. [2021-05-06 06:38:13,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:38:13,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959970079] [2021-05-06 06:38:13,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959970079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:38:13,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248457824] [2021-05-06 06:38:13,746 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:38:13,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2021-05-06 06:38:13,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:38:13,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 06:38:13,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:38:14,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:14,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:15,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:16,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:16,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:16,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:16,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:16,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:16,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:16,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:16,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30664 backedges. 9872 proven. 1458 refuted. 0 times theorem prover too weak. 19334 trivial. 0 not checked. [2021-05-06 06:38:16,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248457824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:38:16,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:38:16,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 30] total 114 [2021-05-06 06:38:16,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206044127] [2021-05-06 06:38:16,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-06 06:38:16,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:38:16,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-06 06:38:16,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-06 06:38:16,423 INFO L87 Difference]: Start difference. First operand 480 states and 583 transitions. Second operand has 114 states, 114 states have (on average 2.5964912280701755) internal successors, (296), 113 states have internal predecessors, (296), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:38:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:38:24,650 INFO L93 Difference]: Finished difference Result 488 states and 595 transitions. [2021-05-06 06:38:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-06 06:38:24,650 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.5964912280701755) internal successors, (296), 113 states have internal predecessors, (296), 2 states have call successors, (4), 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 479 [2021-05-06 06:38:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:38:24,651 INFO L225 Difference]: With dead ends: 488 [2021-05-06 06:38:24,651 INFO L226 Difference]: Without dead ends: 488 [2021-05-06 06:38:24,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6187 ImplicationChecksByTransitivity, 12002.4ms TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2021-05-06 06:38:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-05-06 06:38:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 486. [2021-05-06 06:38:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 481 states have (on average 1.2203742203742203) internal successors, (587), 481 states have internal predecessors, (587), 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) [2021-05-06 06:38:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 591 transitions. [2021-05-06 06:38:24,658 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 591 transitions. Word has length 479 [2021-05-06 06:38:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:38:24,658 INFO L480 AbstractCegarLoop]: Abstraction has 486 states and 591 transitions. [2021-05-06 06:38:24,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.5964912280701755) internal successors, (296), 113 states have internal predecessors, (296), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:38:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 591 transitions. [2021-05-06 06:38:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-05-06 06:38:24,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:38:24,660 INFO L523 BasicCegarLoop]: trace histogram [160, 83, 77, 77, 49, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:38:24,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:38:24,861 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:38:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:38:24,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2095474311, now seen corresponding path program 82 times [2021-05-06 06:38:24,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:38:24,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128525455] [2021-05-06 06:38:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:38:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:38:27,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:38:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:38:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 31452 backedges. 12852 proven. 6972 refuted. 0 times theorem prover too weak. 11628 trivial. 0 not checked. [2021-05-06 06:38:27,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:38:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128525455] [2021-05-06 06:38:27,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128525455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:38:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66118177] [2021-05-06 06:38:27,580 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:38:27,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:38:27,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:38:27,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 06:38:27,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:38:27,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:27,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31452 backedges. 12852 proven. 6972 refuted. 0 times theorem prover too weak. 11628 trivial. 0 not checked. [2021-05-06 06:38:28,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66118177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:38:28,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:38:28,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 88 [2021-05-06 06:38:28,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279211734] [2021-05-06 06:38:28,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 06:38:28,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:38:28,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 06:38:28,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 06:38:28,296 INFO L87 Difference]: Start difference. First operand 486 states and 591 transitions. Second operand has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:38:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:38:33,147 INFO L93 Difference]: Finished difference Result 488 states and 593 transitions. [2021-05-06 06:38:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-06 06:38:33,148 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (4), 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 485 [2021-05-06 06:38:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:38:33,149 INFO L225 Difference]: With dead ends: 488 [2021-05-06 06:38:33,149 INFO L226 Difference]: Without dead ends: 488 [2021-05-06 06:38:33,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 7161.9ms TimeCoverageRelationStatistics Valid=11052, Invalid=18360, Unknown=0, NotChecked=0, Total=29412 [2021-05-06 06:38:33,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-05-06 06:38:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2021-05-06 06:38:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 483 states have (on average 1.2194616977225672) internal successors, (589), 483 states have internal predecessors, (589), 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) [2021-05-06 06:38:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 593 transitions. [2021-05-06 06:38:33,153 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 593 transitions. Word has length 485 [2021-05-06 06:38:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:38:33,154 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 593 transitions. [2021-05-06 06:38:33,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 87 states have internal predecessors, (184), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:38:33,154 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 593 transitions. [2021-05-06 06:38:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-05-06 06:38:33,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:38:33,156 INFO L523 BasicCegarLoop]: trace histogram [161, 84, 77, 77, 49, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:38:33,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:38:33,356 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:38:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:38:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1689783191, now seen corresponding path program 83 times [2021-05-06 06:38:33,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:38:33,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883965] [2021-05-06 06:38:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:38:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:38:36,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:38:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:38:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 31773 backedges. 13005 proven. 7140 refuted. 0 times theorem prover too weak. 11628 trivial. 0 not checked. [2021-05-06 06:38:36,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:38:36,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883965] [2021-05-06 06:38:36,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:38:36,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919198470] [2021-05-06 06:38:36,265 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:38:36,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 107 check-sat command(s) [2021-05-06 06:38:36,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:38:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 06:38:36,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:38:36,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:36,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:37,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:38,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:39,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:40,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:41,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:41,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:41,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:41,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 31773 backedges. 18678 proven. 5157 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2021-05-06 06:38:41,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919198470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:38:41,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:38:41,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 55] total 141 [2021-05-06 06:38:41,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111084609] [2021-05-06 06:38:41,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2021-05-06 06:38:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:38:41,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-05-06 06:38:41,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-06 06:38:41,393 INFO L87 Difference]: Start difference. First operand 488 states and 593 transitions. Second operand has 141 states, 141 states have (on average 2.780141843971631) internal successors, (392), 140 states have internal predecessors, (392), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:38:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:38:53,635 INFO L93 Difference]: Finished difference Result 506 states and 615 transitions. [2021-05-06 06:38:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-05-06 06:38:53,635 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.780141843971631) internal successors, (392), 140 states have internal predecessors, (392), 2 states have call successors, (4), 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 487 [2021-05-06 06:38:53,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:38:53,636 INFO L225 Difference]: With dead ends: 506 [2021-05-06 06:38:53,636 INFO L226 Difference]: Without dead ends: 506 [2021-05-06 06:38:53,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9537 ImplicationChecksByTransitivity, 18148.9ms TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2021-05-06 06:38:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-05-06 06:38:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-05-06 06:38:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 501 states have (on average 1.219560878243513) internal successors, (611), 501 states have internal predecessors, (611), 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) [2021-05-06 06:38:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 615 transitions. [2021-05-06 06:38:53,641 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 615 transitions. Word has length 487 [2021-05-06 06:38:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:38:53,642 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 615 transitions. [2021-05-06 06:38:53,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 141 states, 141 states have (on average 2.780141843971631) internal successors, (392), 140 states have internal predecessors, (392), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:38:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 615 transitions. [2021-05-06 06:38:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-05-06 06:38:53,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:38:53,644 INFO L523 BasicCegarLoop]: trace histogram [166, 85, 81, 81, 53, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:38:53,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-06 06:38:53,852 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:38:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:38:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1264173333, now seen corresponding path program 84 times [2021-05-06 06:38:53,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:38:53,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097979898] [2021-05-06 06:38:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:38:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:38:56,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:38:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:38:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34036 backedges. 13846 proven. 7310 refuted. 0 times theorem prover too weak. 12880 trivial. 0 not checked. [2021-05-06 06:38:56,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:38:56,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097979898] [2021-05-06 06:38:56,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097979898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:38:56,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756036377] [2021-05-06 06:38:56,782 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:38:56,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2021-05-06 06:38:56,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:38:57,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 06:38:57,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:38:57,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:57,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:58,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:38:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34036 backedges. 10858 proven. 1568 refuted. 0 times theorem prover too weak. 21610 trivial. 0 not checked. [2021-05-06 06:38:59,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756036377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:38:59,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:38:59,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 31] total 118 [2021-05-06 06:38:59,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814420206] [2021-05-06 06:38:59,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-06 06:38:59,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:38:59,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-06 06:38:59,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-06 06:38:59,711 INFO L87 Difference]: Start difference. First operand 506 states and 615 transitions. Second operand has 118 states, 118 states have (on average 2.593220338983051) internal successors, (306), 117 states have internal predecessors, (306), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:39:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:39:08,419 INFO L93 Difference]: Finished difference Result 514 states and 627 transitions. [2021-05-06 06:39:08,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-06 06:39:08,419 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.593220338983051) internal successors, (306), 117 states have internal predecessors, (306), 2 states have call successors, (4), 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 505 [2021-05-06 06:39:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:39:08,421 INFO L225 Difference]: With dead ends: 514 [2021-05-06 06:39:08,421 INFO L226 Difference]: Without dead ends: 514 [2021-05-06 06:39:08,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6640 ImplicationChecksByTransitivity, 12901.5ms TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2021-05-06 06:39:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-06 06:39:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 512. [2021-05-06 06:39:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 507 states have (on average 1.2209072978303748) internal successors, (619), 507 states have internal predecessors, (619), 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) [2021-05-06 06:39:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 623 transitions. [2021-05-06 06:39:08,426 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 623 transitions. Word has length 505 [2021-05-06 06:39:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:39:08,426 INFO L480 AbstractCegarLoop]: Abstraction has 512 states and 623 transitions. [2021-05-06 06:39:08,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.593220338983051) internal successors, (306), 117 states have internal predecessors, (306), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:39:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 623 transitions. [2021-05-06 06:39:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-05-06 06:39:08,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:39:08,428 INFO L523 BasicCegarLoop]: trace histogram [168, 86, 82, 82, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:39:08,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:39:08,629 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:39:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:39:08,629 INFO L82 PathProgramCache]: Analyzing trace with hash -806513364, now seen corresponding path program 85 times [2021-05-06 06:39:08,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:39:08,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818781309] [2021-05-06 06:39:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:39:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:11,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:39:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34866 backedges. 14181 proven. 7482 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-06 06:39:11,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:39:11,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818781309] [2021-05-06 06:39:11,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818781309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:39:11,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719860605] [2021-05-06 06:39:11,555 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:39:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:11,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-06 06:39:11,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:39:11,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:11,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:12,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:12,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34866 backedges. 14181 proven. 7482 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-06 06:39:12,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719860605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:39:12,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:39:12,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89] total 91 [2021-05-06 06:39:12,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262442280] [2021-05-06 06:39:12,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-06 06:39:12,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:39:12,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-06 06:39:12,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 06:39:12,279 INFO L87 Difference]: Start difference. First operand 512 states and 623 transitions. Second operand has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:39:17,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:39:17,342 INFO L93 Difference]: Finished difference Result 514 states and 625 transitions. [2021-05-06 06:39:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 06:39:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (4), 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 511 [2021-05-06 06:39:17,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:39:17,343 INFO L225 Difference]: With dead ends: 514 [2021-05-06 06:39:17,344 INFO L226 Difference]: Without dead ends: 514 [2021-05-06 06:39:17,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 7595.2ms TimeCoverageRelationStatistics Valid=11838, Invalid=19668, Unknown=0, NotChecked=0, Total=31506 [2021-05-06 06:39:17,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-05-06 06:39:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-05-06 06:39:17,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 509 states have (on average 1.2200392927308448) internal successors, (621), 509 states have internal predecessors, (621), 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) [2021-05-06 06:39:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 625 transitions. [2021-05-06 06:39:17,349 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 625 transitions. Word has length 511 [2021-05-06 06:39:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:39:17,349 INFO L480 AbstractCegarLoop]: Abstraction has 514 states and 625 transitions. [2021-05-06 06:39:17,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.087912087912088) internal successors, (190), 90 states have internal predecessors, (190), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:39:17,349 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 625 transitions. [2021-05-06 06:39:17,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2021-05-06 06:39:17,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:39:17,351 INFO L523 BasicCegarLoop]: trace histogram [169, 87, 82, 82, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:39:17,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-06 06:39:17,552 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:39:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:39:17,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1727955510, now seen corresponding path program 86 times [2021-05-06 06:39:17,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:39:17,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044018336] [2021-05-06 06:39:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:39:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:20,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:39:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 35203 backedges. 14344 proven. 7656 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-06 06:39:20,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:39:20,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044018336] [2021-05-06 06:39:20,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044018336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:39:20,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62030346] [2021-05-06 06:39:20,489 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:39:20,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:39:20,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:39:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 06:39:20,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:39:20,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:20,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 35203 backedges. 14344 proven. 7656 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-06 06:39:21,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62030346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:39:21,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:39:21,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90] total 92 [2021-05-06 06:39:21,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268984614] [2021-05-06 06:39:21,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-06 06:39:21,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:39:21,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-06 06:39:21,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 06:39:21,231 INFO L87 Difference]: Start difference. First operand 514 states and 625 transitions. Second operand has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:39:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:39:26,418 INFO L93 Difference]: Finished difference Result 516 states and 627 transitions. [2021-05-06 06:39:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-06 06:39:26,419 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (4), 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 513 [2021-05-06 06:39:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:39:26,420 INFO L225 Difference]: With dead ends: 516 [2021-05-06 06:39:26,420 INFO L226 Difference]: Without dead ends: 516 [2021-05-06 06:39:26,421 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4173 ImplicationChecksByTransitivity, 7720.5ms TimeCoverageRelationStatistics Valid=12106, Invalid=20114, Unknown=0, NotChecked=0, Total=32220 [2021-05-06 06:39:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-06 06:39:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2021-05-06 06:39:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 511 states have (on average 1.2191780821917808) internal successors, (623), 511 states have internal predecessors, (623), 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) [2021-05-06 06:39:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 627 transitions. [2021-05-06 06:39:26,424 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 627 transitions. Word has length 513 [2021-05-06 06:39:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:39:26,424 INFO L480 AbstractCegarLoop]: Abstraction has 516 states and 627 transitions. [2021-05-06 06:39:26,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0869565217391304) internal successors, (192), 91 states have internal predecessors, (192), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:39:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 627 transitions. [2021-05-06 06:39:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-05-06 06:39:26,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:39:26,426 INFO L523 BasicCegarLoop]: trace histogram [170, 88, 82, 82, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:39:26,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:39:26,627 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:39:26,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:39:26,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1824372456, now seen corresponding path program 87 times [2021-05-06 06:39:26,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:39:26,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046175502] [2021-05-06 06:39:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:39:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:29,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:39:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 35542 backedges. 14507 proven. 7832 refuted. 0 times theorem prover too weak. 13203 trivial. 0 not checked. [2021-05-06 06:39:29,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:39:29,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046175502] [2021-05-06 06:39:29,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046175502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:39:29,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958843081] [2021-05-06 06:39:29,658 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:39:29,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2021-05-06 06:39:29,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:39:29,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 06:39:29,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:39:30,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:30,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:31,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 35542 backedges. 11416 proven. 1682 refuted. 0 times theorem prover too weak. 22444 trivial. 0 not checked. [2021-05-06 06:39:32,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958843081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:39:32,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:39:32,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 32] total 122 [2021-05-06 06:39:32,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42380483] [2021-05-06 06:39:32,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-06 06:39:32,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:39:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-06 06:39:32,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-06 06:39:32,663 INFO L87 Difference]: Start difference. First operand 516 states and 627 transitions. Second operand has 122 states, 122 states have (on average 2.5901639344262297) internal successors, (316), 121 states have internal predecessors, (316), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:39:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:39:41,887 INFO L93 Difference]: Finished difference Result 524 states and 639 transitions. [2021-05-06 06:39:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-06 06:39:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.5901639344262297) internal successors, (316), 121 states have internal predecessors, (316), 2 states have call successors, (4), 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 515 [2021-05-06 06:39:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:39:41,888 INFO L225 Difference]: With dead ends: 524 [2021-05-06 06:39:41,888 INFO L226 Difference]: Without dead ends: 524 [2021-05-06 06:39:41,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7109 ImplicationChecksByTransitivity, 13589.9ms TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2021-05-06 06:39:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-05-06 06:39:41,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2021-05-06 06:39:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 517 states have (on average 1.2205029013539652) internal successors, (631), 517 states have internal predecessors, (631), 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) [2021-05-06 06:39:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 635 transitions. [2021-05-06 06:39:41,894 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 635 transitions. Word has length 515 [2021-05-06 06:39:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:39:41,894 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 635 transitions. [2021-05-06 06:39:41,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.5901639344262297) internal successors, (316), 121 states have internal predecessors, (316), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:39:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 635 transitions. [2021-05-06 06:39:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2021-05-06 06:39:41,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:39:41,896 INFO L523 BasicCegarLoop]: trace histogram [172, 89, 83, 83, 53, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:39:42,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:39:42,097 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:39:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:39:42,097 INFO L82 PathProgramCache]: Analyzing trace with hash 893606911, now seen corresponding path program 88 times [2021-05-06 06:39:42,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:39:42,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471542633] [2021-05-06 06:39:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:39:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:45,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:39:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 36390 backedges. 14850 proven. 8010 refuted. 0 times theorem prover too weak. 13530 trivial. 0 not checked. [2021-05-06 06:39:45,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:39:45,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471542633] [2021-05-06 06:39:45,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471542633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:39:45,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144951725] [2021-05-06 06:39:45,205 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:39:45,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:39:45,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:39:45,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-06 06:39:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:39:45,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36390 backedges. 14850 proven. 8010 refuted. 0 times theorem prover too weak. 13530 trivial. 0 not checked. [2021-05-06 06:39:45,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144951725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:39:45,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:39:45,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92] total 94 [2021-05-06 06:39:45,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782770583] [2021-05-06 06:39:45,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 06:39:45,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:39:45,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 06:39:45,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 06:39:45,954 INFO L87 Difference]: Start difference. First operand 522 states and 635 transitions. Second operand has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:39:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:39:51,445 INFO L93 Difference]: Finished difference Result 524 states and 637 transitions. [2021-05-06 06:39:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-06 06:39:51,445 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (4), 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 521 [2021-05-06 06:39:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:39:51,446 INFO L225 Difference]: With dead ends: 524 [2021-05-06 06:39:51,446 INFO L226 Difference]: Without dead ends: 524 [2021-05-06 06:39:51,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 8092.4ms TimeCoverageRelationStatistics Valid=12651, Invalid=21021, Unknown=0, NotChecked=0, Total=33672 [2021-05-06 06:39:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-05-06 06:39:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2021-05-06 06:39:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 519 states have (on average 1.2196531791907514) internal successors, (633), 519 states have internal predecessors, (633), 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) [2021-05-06 06:39:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 637 transitions. [2021-05-06 06:39:51,451 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 637 transitions. Word has length 521 [2021-05-06 06:39:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:39:51,451 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 637 transitions. [2021-05-06 06:39:51,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:39:51,451 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 637 transitions. [2021-05-06 06:39:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2021-05-06 06:39:51,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:39:51,453 INFO L523 BasicCegarLoop]: trace histogram [173, 90, 83, 83, 53, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:39:51,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:39:51,654 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:39:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:39:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash 700159773, now seen corresponding path program 89 times [2021-05-06 06:39:51,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:39:51,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432096215] [2021-05-06 06:39:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:39:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:54,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:39:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:39:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36735 backedges. 15015 proven. 8190 refuted. 0 times theorem prover too weak. 13530 trivial. 0 not checked. [2021-05-06 06:39:54,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:39:54,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432096215] [2021-05-06 06:39:54,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432096215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:39:54,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896645335] [2021-05-06 06:39:54,921 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:39:55,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 115 check-sat command(s) [2021-05-06 06:39:55,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:39:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 06:39:55,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:39:55,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:55,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:56,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:57,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:58,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:39:59,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36735 backedges. 21570 proven. 6001 refuted. 0 times theorem prover too weak. 9164 trivial. 0 not checked. [2021-05-06 06:40:00,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896645335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:40:00,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:40:00,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 59] total 151 [2021-05-06 06:40:00,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209211241] [2021-05-06 06:40:00,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 151 states [2021-05-06 06:40:00,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:40:00,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-05-06 06:40:00,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2021-05-06 06:40:00,696 INFO L87 Difference]: Start difference. First operand 524 states and 637 transitions. Second operand has 151 states, 151 states have (on average 2.781456953642384) internal successors, (420), 150 states have internal predecessors, (420), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:40:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:40:14,748 INFO L93 Difference]: Finished difference Result 542 states and 659 transitions. [2021-05-06 06:40:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-05-06 06:40:14,749 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.781456953642384) internal successors, (420), 150 states have internal predecessors, (420), 2 states have call successors, (4), 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 523 [2021-05-06 06:40:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:40:14,750 INFO L225 Difference]: With dead ends: 542 [2021-05-06 06:40:14,750 INFO L226 Difference]: Without dead ends: 542 [2021-05-06 06:40:14,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10968 ImplicationChecksByTransitivity, 20609.3ms TimeCoverageRelationStatistics Valid=33525, Invalid=55577, Unknown=0, NotChecked=0, Total=89102 [2021-05-06 06:40:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-05-06 06:40:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-05-06 06:40:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 537 states have (on average 1.2197392923649908) internal successors, (655), 537 states have internal predecessors, (655), 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) [2021-05-06 06:40:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 659 transitions. [2021-05-06 06:40:14,756 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 659 transitions. Word has length 523 [2021-05-06 06:40:14,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:40:14,756 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 659 transitions. [2021-05-06 06:40:14,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 151 states, 151 states have (on average 2.781456953642384) internal successors, (420), 150 states have internal predecessors, (420), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:40:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 659 transitions. [2021-05-06 06:40:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2021-05-06 06:40:14,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:40:14,759 INFO L523 BasicCegarLoop]: trace histogram [178, 91, 87, 87, 57, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:40:14,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:40:14,960 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:40:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:40:14,960 INFO L82 PathProgramCache]: Analyzing trace with hash -751088229, now seen corresponding path program 90 times [2021-05-06 06:40:14,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:40:14,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012125396] [2021-05-06 06:40:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:40:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:40:18,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:40:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:40:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 39166 backedges. 15916 proven. 8372 refuted. 0 times theorem prover too weak. 14878 trivial. 0 not checked. [2021-05-06 06:40:18,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:40:18,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012125396] [2021-05-06 06:40:18,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012125396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:40:18,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779979622] [2021-05-06 06:40:18,208 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:40:18,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2021-05-06 06:40:18,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:40:18,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 06:40:18,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:40:18,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:18,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:18,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:19,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:20,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 39166 backedges. 12474 proven. 1800 refuted. 0 times theorem prover too weak. 24892 trivial. 0 not checked. [2021-05-06 06:40:21,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779979622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:40:21,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:40:21,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 33] total 126 [2021-05-06 06:40:21,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76715857] [2021-05-06 06:40:21,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-06 06:40:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:40:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-06 06:40:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-06 06:40:21,505 INFO L87 Difference]: Start difference. First operand 542 states and 659 transitions. Second operand has 126 states, 126 states have (on average 2.5873015873015874) internal successors, (326), 125 states have internal predecessors, (326), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:40:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:40:31,346 INFO L93 Difference]: Finished difference Result 550 states and 671 transitions. [2021-05-06 06:40:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-06 06:40:31,347 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.5873015873015874) internal successors, (326), 125 states have internal predecessors, (326), 2 states have call successors, (4), 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 541 [2021-05-06 06:40:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:40:31,348 INFO L225 Difference]: With dead ends: 550 [2021-05-06 06:40:31,348 INFO L226 Difference]: Without dead ends: 550 [2021-05-06 06:40:31,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7594 ImplicationChecksByTransitivity, 14499.4ms TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2021-05-06 06:40:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-06 06:40:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 548. [2021-05-06 06:40:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 543 states have (on average 1.2209944751381216) internal successors, (663), 543 states have internal predecessors, (663), 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) [2021-05-06 06:40:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 667 transitions. [2021-05-06 06:40:31,354 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 667 transitions. Word has length 541 [2021-05-06 06:40:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:40:31,354 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 667 transitions. [2021-05-06 06:40:31,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.5873015873015874) internal successors, (326), 125 states have internal predecessors, (326), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:40:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 667 transitions. [2021-05-06 06:40:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2021-05-06 06:40:31,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:40:31,357 INFO L523 BasicCegarLoop]: trace histogram [180, 92, 88, 88, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:40:31,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-06 06:40:31,558 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:40:31,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:40:31,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2144876466, now seen corresponding path program 91 times [2021-05-06 06:40:31,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:40:31,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051153505] [2021-05-06 06:40:31,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:40:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:40:34,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:40:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:40:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 16275 proven. 8556 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-06 06:40:34,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:40:34,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051153505] [2021-05-06 06:40:34,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051153505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:40:34,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901285097] [2021-05-06 06:40:34,859 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:40:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:40:35,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-06 06:40:35,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:40:35,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 16275 proven. 8556 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-06 06:40:35,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901285097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:40:35,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:40:35,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95] total 97 [2021-05-06 06:40:35,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775624719] [2021-05-06 06:40:35,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-06 06:40:35,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:40:35,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-06 06:40:35,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 06:40:35,624 INFO L87 Difference]: Start difference. First operand 548 states and 667 transitions. Second operand has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:40:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:40:41,349 INFO L93 Difference]: Finished difference Result 550 states and 669 transitions. [2021-05-06 06:40:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-06 06:40:41,349 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (4), 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 547 [2021-05-06 06:40:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:40:41,351 INFO L225 Difference]: With dead ends: 550 [2021-05-06 06:40:41,351 INFO L226 Difference]: Without dead ends: 550 [2021-05-06 06:40:41,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 8579.6ms TimeCoverageRelationStatistics Valid=13491, Invalid=22419, Unknown=0, NotChecked=0, Total=35910 [2021-05-06 06:40:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-06 06:40:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-05-06 06:40:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 545 states have (on average 1.2201834862385321) internal successors, (665), 545 states have internal predecessors, (665), 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) [2021-05-06 06:40:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 669 transitions. [2021-05-06 06:40:41,356 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 669 transitions. Word has length 547 [2021-05-06 06:40:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:40:41,356 INFO L480 AbstractCegarLoop]: Abstraction has 550 states and 669 transitions. [2021-05-06 06:40:41,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 96 states have internal predecessors, (202), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:40:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 669 transitions. [2021-05-06 06:40:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-05-06 06:40:41,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:40:41,359 INFO L523 BasicCegarLoop]: trace histogram [181, 93, 88, 88, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:40:41,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:40:41,559 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:40:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:40:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1263752880, now seen corresponding path program 92 times [2021-05-06 06:40:41,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:40:41,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670804045] [2021-05-06 06:40:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:40:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:40:44,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:40:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:40:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 40417 backedges. 16450 proven. 8742 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-06 06:40:44,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:40:44,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670804045] [2021-05-06 06:40:44,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670804045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:40:44,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661246438] [2021-05-06 06:40:44,907 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:40:45,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:40:45,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:40:45,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-06 06:40:45,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:40:45,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 40417 backedges. 16450 proven. 8742 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-06 06:40:45,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661246438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:40:45,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:40:45,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96] total 98 [2021-05-06 06:40:45,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228377262] [2021-05-06 06:40:45,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-06 06:40:45,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:40:45,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-06 06:40:45,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 06:40:45,665 INFO L87 Difference]: Start difference. First operand 550 states and 669 transitions. Second operand has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:40:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:40:51,604 INFO L93 Difference]: Finished difference Result 552 states and 671 transitions. [2021-05-06 06:40:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-06 06:40:51,605 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 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 549 [2021-05-06 06:40:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:40:51,606 INFO L225 Difference]: With dead ends: 552 [2021-05-06 06:40:51,606 INFO L226 Difference]: Without dead ends: 552 [2021-05-06 06:40:51,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4740 ImplicationChecksByTransitivity, 8747.4ms TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2021-05-06 06:40:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-05-06 06:40:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-05-06 06:40:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.2193784277879343) internal successors, (667), 547 states have internal predecessors, (667), 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) [2021-05-06 06:40:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 671 transitions. [2021-05-06 06:40:51,611 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 671 transitions. Word has length 549 [2021-05-06 06:40:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:40:51,611 INFO L480 AbstractCegarLoop]: Abstraction has 552 states and 671 transitions. [2021-05-06 06:40:51,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:40:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 671 transitions. [2021-05-06 06:40:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2021-05-06 06:40:51,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:40:51,614 INFO L523 BasicCegarLoop]: trace histogram [182, 94, 88, 88, 57, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:40:51,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-06 06:40:51,814 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:40:51,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:40:51,814 INFO L82 PathProgramCache]: Analyzing trace with hash 103492462, now seen corresponding path program 93 times [2021-05-06 06:40:51,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:40:51,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294340377] [2021-05-06 06:40:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:40:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:40:55,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:40:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:40:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 40780 backedges. 16625 proven. 8930 refuted. 0 times theorem prover too weak. 15225 trivial. 0 not checked. [2021-05-06 06:40:55,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:40:55,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294340377] [2021-05-06 06:40:55,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294340377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:40:55,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459391034] [2021-05-06 06:40:55,219 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:40:55,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-05-06 06:40:55,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:40:55,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 06:40:55,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:40:55,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:55,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:55,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:55,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:55,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:55,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:57,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:40:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 40780 backedges. 13072 proven. 1922 refuted. 0 times theorem prover too weak. 25786 trivial. 0 not checked. [2021-05-06 06:40:58,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459391034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:40:58,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:40:58,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 34] total 130 [2021-05-06 06:40:58,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213909339] [2021-05-06 06:40:58,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-06 06:40:58,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:40:58,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-06 06:40:58,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-06 06:40:58,566 INFO L87 Difference]: Start difference. First operand 552 states and 671 transitions. Second operand has 130 states, 130 states have (on average 2.5846153846153848) internal successors, (336), 129 states have internal predecessors, (336), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:41:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:41:08,997 INFO L93 Difference]: Finished difference Result 560 states and 683 transitions. [2021-05-06 06:41:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-06 06:41:08,998 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.5846153846153848) internal successors, (336), 129 states have internal predecessors, (336), 2 states have call successors, (4), 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 551 [2021-05-06 06:41:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:41:08,999 INFO L225 Difference]: With dead ends: 560 [2021-05-06 06:41:08,999 INFO L226 Difference]: Without dead ends: 560 [2021-05-06 06:41:09,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8095 ImplicationChecksByTransitivity, 15303.0ms TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2021-05-06 06:41:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-05-06 06:41:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 558. [2021-05-06 06:41:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 553 states have (on average 1.2206148282097649) internal successors, (675), 553 states have internal predecessors, (675), 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) [2021-05-06 06:41:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 679 transitions. [2021-05-06 06:41:09,005 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 679 transitions. Word has length 551 [2021-05-06 06:41:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:41:09,005 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 679 transitions. [2021-05-06 06:41:09,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.5846153846153848) internal successors, (336), 129 states have internal predecessors, (336), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:41:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 679 transitions. [2021-05-06 06:41:09,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2021-05-06 06:41:09,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:41:09,008 INFO L523 BasicCegarLoop]: trace histogram [184, 95, 89, 89, 57, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:41:09,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:41:09,209 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:41:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:41:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash 90089093, now seen corresponding path program 94 times [2021-05-06 06:41:09,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:41:09,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062195132] [2021-05-06 06:41:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:41:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:41:12,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:41:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:41:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 41688 backedges. 16992 proven. 9120 refuted. 0 times theorem prover too weak. 15576 trivial. 0 not checked. [2021-05-06 06:41:12,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:41:12,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062195132] [2021-05-06 06:41:12,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062195132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:41:12,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666462124] [2021-05-06 06:41:12,726 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:41:12,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:41:12,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:41:12,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-06 06:41:12,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:41:12,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:12,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 41688 backedges. 16992 proven. 9120 refuted. 0 times theorem prover too weak. 15576 trivial. 0 not checked. [2021-05-06 06:41:13,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666462124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:41:13,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:41:13,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98] total 100 [2021-05-06 06:41:13,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218006854] [2021-05-06 06:41:13,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-06 06:41:13,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:41:13,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-06 06:41:13,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-06 06:41:13,542 INFO L87 Difference]: Start difference. First operand 558 states and 679 transitions. Second operand has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:41:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:41:19,639 INFO L93 Difference]: Finished difference Result 560 states and 681 transitions. [2021-05-06 06:41:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-06 06:41:19,640 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (4), 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 557 [2021-05-06 06:41:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:41:19,641 INFO L225 Difference]: With dead ends: 560 [2021-05-06 06:41:19,641 INFO L226 Difference]: Without dead ends: 560 [2021-05-06 06:41:19,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 9079.2ms TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2021-05-06 06:41:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-05-06 06:41:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2021-05-06 06:41:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 555 states have (on average 1.2198198198198198) internal successors, (677), 555 states have internal predecessors, (677), 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) [2021-05-06 06:41:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 681 transitions. [2021-05-06 06:41:19,648 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 681 transitions. Word has length 557 [2021-05-06 06:41:19,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:41:19,649 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 681 transitions. [2021-05-06 06:41:19,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:41:19,649 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 681 transitions. [2021-05-06 06:41:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2021-05-06 06:41:19,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:41:19,651 INFO L523 BasicCegarLoop]: trace histogram [185, 96, 89, 89, 57, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:41:19,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:41:19,852 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:41:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:41:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash 423635619, now seen corresponding path program 95 times [2021-05-06 06:41:19,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:41:19,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379424256] [2021-05-06 06:41:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:41:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:41:23,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:41:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:41:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 42057 backedges. 17169 proven. 9312 refuted. 0 times theorem prover too weak. 15576 trivial. 0 not checked. [2021-05-06 06:41:23,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:41:23,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379424256] [2021-05-06 06:41:23,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379424256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:41:23,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450876269] [2021-05-06 06:41:23,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:41:23,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 123 check-sat command(s) [2021-05-06 06:41:23,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:41:23,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 06:41:23,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:41:23,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:23,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:23,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:23,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:23,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:23,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:24,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:25,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:26,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:27,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:28,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42057 backedges. 24670 proven. 6909 refuted. 0 times theorem prover too weak. 10478 trivial. 0 not checked. [2021-05-06 06:41:29,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450876269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:41:29,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:41:29,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 63] total 161 [2021-05-06 06:41:29,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714389298] [2021-05-06 06:41:29,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 161 states [2021-05-06 06:41:29,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:41:29,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2021-05-06 06:41:29,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2021-05-06 06:41:29,975 INFO L87 Difference]: Start difference. First operand 560 states and 681 transitions. Second operand has 161 states, 161 states have (on average 2.782608695652174) internal successors, (448), 160 states have internal predecessors, (448), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:41:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:41:45,897 INFO L93 Difference]: Finished difference Result 578 states and 703 transitions. [2021-05-06 06:41:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-05-06 06:41:45,898 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.782608695652174) internal successors, (448), 160 states have internal predecessors, (448), 2 states have call successors, (4), 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 559 [2021-05-06 06:41:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:41:45,899 INFO L225 Difference]: With dead ends: 578 [2021-05-06 06:41:45,900 INFO L226 Difference]: Without dead ends: 578 [2021-05-06 06:41:45,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 23306.4ms TimeCoverageRelationStatistics Valid=38160, Invalid=63282, Unknown=0, NotChecked=0, Total=101442 [2021-05-06 06:41:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-05-06 06:41:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-05-06 06:41:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 573 states have (on average 1.219895287958115) internal successors, (699), 573 states have internal predecessors, (699), 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) [2021-05-06 06:41:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 703 transitions. [2021-05-06 06:41:45,909 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 703 transitions. Word has length 559 [2021-05-06 06:41:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:41:45,910 INFO L480 AbstractCegarLoop]: Abstraction has 578 states and 703 transitions. [2021-05-06 06:41:45,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 161 states, 161 states have (on average 2.782608695652174) internal successors, (448), 160 states have internal predecessors, (448), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:41:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 703 transitions. [2021-05-06 06:41:45,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-05-06 06:41:45,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:41:45,913 INFO L523 BasicCegarLoop]: trace histogram [190, 97, 93, 93, 61, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:41:46,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-06 06:41:46,117 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:41:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:41:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1481022943, now seen corresponding path program 96 times [2021-05-06 06:41:46,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:41:46,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253436144] [2021-05-06 06:41:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:41:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:41:49,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:41:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:41:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 44656 backedges. 18130 proven. 9506 refuted. 0 times theorem prover too weak. 17020 trivial. 0 not checked. [2021-05-06 06:41:49,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:41:49,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253436144] [2021-05-06 06:41:49,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253436144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:41:49,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790868646] [2021-05-06 06:41:49,872 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:41:50,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 131 check-sat command(s) [2021-05-06 06:41:50,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:41:50,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 06:41:50,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:41:50,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:50,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:50,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:50,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:50,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:50,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:50,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:50,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:50,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:50,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:51,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:52,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:41:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 44656 backedges. 14202 proven. 2048 refuted. 0 times theorem prover too weak. 28406 trivial. 0 not checked. [2021-05-06 06:41:53,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790868646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:41:53,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:41:53,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 35] total 134 [2021-05-06 06:41:53,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551928356] [2021-05-06 06:41:53,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-06 06:41:53,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:41:53,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-06 06:41:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-06 06:41:53,583 INFO L87 Difference]: Start difference. First operand 578 states and 703 transitions. Second operand has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 133 states have internal predecessors, (346), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:42:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:42:04,726 INFO L93 Difference]: Finished difference Result 586 states and 715 transitions. [2021-05-06 06:42:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-06 06:42:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 133 states have internal predecessors, (346), 2 states have call successors, (4), 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 577 [2021-05-06 06:42:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:42:04,728 INFO L225 Difference]: With dead ends: 586 [2021-05-06 06:42:04,728 INFO L226 Difference]: Without dead ends: 586 [2021-05-06 06:42:04,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8612 ImplicationChecksByTransitivity, 16443.9ms TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2021-05-06 06:42:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-05-06 06:42:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2021-05-06 06:42:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.221070811744387) internal successors, (707), 579 states have internal predecessors, (707), 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) [2021-05-06 06:42:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 711 transitions. [2021-05-06 06:42:04,735 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 711 transitions. Word has length 577 [2021-05-06 06:42:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:42:04,736 INFO L480 AbstractCegarLoop]: Abstraction has 584 states and 711 transitions. [2021-05-06 06:42:04,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.582089552238806) internal successors, (346), 133 states have internal predecessors, (346), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:42:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 711 transitions. [2021-05-06 06:42:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2021-05-06 06:42:04,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:42:04,738 INFO L523 BasicCegarLoop]: trace histogram [192, 98, 94, 94, 61, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:42:04,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-06 06:42:04,939 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:42:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:42:04,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2132090312, now seen corresponding path program 97 times [2021-05-06 06:42:04,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:42:04,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731244594] [2021-05-06 06:42:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:42:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:42:08,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:42:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:42:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 45606 backedges. 18513 proven. 9702 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-06 06:42:08,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:42:08,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731244594] [2021-05-06 06:42:08,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731244594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:42:08,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812598279] [2021-05-06 06:42:08,719 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:42:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:42:08,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-06 06:42:08,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:42:08,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:08,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 45606 backedges. 18513 proven. 9702 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-06 06:42:09,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812598279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:42:09,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:42:09,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101] total 103 [2021-05-06 06:42:09,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553616205] [2021-05-06 06:42:09,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-06 06:42:09,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:42:09,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-06 06:42:09,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-06 06:42:09,572 INFO L87 Difference]: Start difference. First operand 584 states and 711 transitions. Second operand has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:42:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:42:16,082 INFO L93 Difference]: Finished difference Result 586 states and 713 transitions. [2021-05-06 06:42:16,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-06 06:42:16,083 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (4), 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 583 [2021-05-06 06:42:16,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:42:16,084 INFO L225 Difference]: With dead ends: 586 [2021-05-06 06:42:16,084 INFO L226 Difference]: Without dead ends: 586 [2021-05-06 06:42:16,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 9684.7ms TimeCoverageRelationStatistics Valid=15252, Invalid=25350, Unknown=0, NotChecked=0, Total=40602 [2021-05-06 06:42:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-05-06 06:42:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2021-05-06 06:42:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 581 states have (on average 1.2203098106712564) internal successors, (709), 581 states have internal predecessors, (709), 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) [2021-05-06 06:42:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 713 transitions. [2021-05-06 06:42:16,091 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 713 transitions. Word has length 583 [2021-05-06 06:42:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:42:16,091 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 713 transitions. [2021-05-06 06:42:16,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0776699029126213) internal successors, (214), 102 states have internal predecessors, (214), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:42:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 713 transitions. [2021-05-06 06:42:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2021-05-06 06:42:16,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:42:16,094 INFO L523 BasicCegarLoop]: trace histogram [193, 99, 94, 94, 61, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:42:16,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:42:16,309 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:42:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:42:16,309 INFO L82 PathProgramCache]: Analyzing trace with hash 296705238, now seen corresponding path program 98 times [2021-05-06 06:42:16,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:42:16,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100443474] [2021-05-06 06:42:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:42:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:42:20,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:42:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:42:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 45991 backedges. 18700 proven. 9900 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-06 06:42:20,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:42:20,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100443474] [2021-05-06 06:42:20,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100443474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:42:20,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534104690] [2021-05-06 06:42:20,121 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:42:20,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 06:42:20,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:42:20,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-06 06:42:20,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:42:20,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 45991 backedges. 18700 proven. 9900 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-06 06:42:20,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534104690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:42:20,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:42:20,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102] total 104 [2021-05-06 06:42:20,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669673106] [2021-05-06 06:42:20,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-06 06:42:20,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:42:20,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-06 06:42:20,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-06 06:42:20,941 INFO L87 Difference]: Start difference. First operand 586 states and 713 transitions. Second operand has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:42:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:42:27,424 INFO L93 Difference]: Finished difference Result 588 states and 715 transitions. [2021-05-06 06:42:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-06 06:42:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 2 states have call successors, (4), 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 585 [2021-05-06 06:42:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:42:27,426 INFO L225 Difference]: With dead ends: 588 [2021-05-06 06:42:27,426 INFO L226 Difference]: Without dead ends: 588 [2021-05-06 06:42:27,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5343 ImplicationChecksByTransitivity, 9808.5ms TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2021-05-06 06:42:27,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-06 06:42:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2021-05-06 06:42:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 583 states have (on average 1.2195540308747856) internal successors, (711), 583 states have internal predecessors, (711), 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) [2021-05-06 06:42:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 715 transitions. [2021-05-06 06:42:27,432 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 715 transitions. Word has length 585 [2021-05-06 06:42:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:42:27,432 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 715 transitions. [2021-05-06 06:42:27,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.076923076923077) internal successors, (216), 103 states have internal predecessors, (216), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:42:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 715 transitions. [2021-05-06 06:42:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2021-05-06 06:42:27,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:42:27,436 INFO L523 BasicCegarLoop]: trace histogram [194, 100, 94, 94, 61, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:42:27,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-06 06:42:27,661 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:42:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:42:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2092980236, now seen corresponding path program 99 times [2021-05-06 06:42:27,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:42:27,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644189132] [2021-05-06 06:42:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:42:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:42:31,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:42:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:42:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 46378 backedges. 18887 proven. 10100 refuted. 0 times theorem prover too weak. 17391 trivial. 0 not checked. [2021-05-06 06:42:31,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:42:31,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644189132] [2021-05-06 06:42:31,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644189132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:42:31,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111359780] [2021-05-06 06:42:31,536 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:42:31,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2021-05-06 06:42:31,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:42:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 06:42:31,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:42:32,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:32,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:33,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:34,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:35,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:35,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:35,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:35,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 46378 backedges. 14840 proven. 2178 refuted. 0 times theorem prover too weak. 29360 trivial. 0 not checked. [2021-05-06 06:42:35,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111359780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:42:35,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:42:35,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 36] total 138 [2021-05-06 06:42:35,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413246619] [2021-05-06 06:42:35,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-06 06:42:35,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:42:35,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-06 06:42:35,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-06 06:42:35,284 INFO L87 Difference]: Start difference. First operand 588 states and 715 transitions. Second operand has 138 states, 138 states have (on average 2.579710144927536) internal successors, (356), 137 states have internal predecessors, (356), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:42:46,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:42:46,891 INFO L93 Difference]: Finished difference Result 596 states and 727 transitions. [2021-05-06 06:42:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-06 06:42:46,892 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.579710144927536) internal successors, (356), 137 states have internal predecessors, (356), 2 states have call successors, (4), 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 587 [2021-05-06 06:42:46,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:42:46,892 INFO L225 Difference]: With dead ends: 596 [2021-05-06 06:42:46,893 INFO L226 Difference]: Without dead ends: 596 [2021-05-06 06:42:46,895 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9145 ImplicationChecksByTransitivity, 17247.0ms TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2021-05-06 06:42:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-05-06 06:42:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 594. [2021-05-06 06:42:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 589 states have (on average 1.2207130730050935) internal successors, (719), 589 states have internal predecessors, (719), 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) [2021-05-06 06:42:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 723 transitions. [2021-05-06 06:42:46,899 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 723 transitions. Word has length 587 [2021-05-06 06:42:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:42:46,900 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 723 transitions. [2021-05-06 06:42:46,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 2.579710144927536) internal successors, (356), 137 states have internal predecessors, (356), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:42:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 723 transitions. [2021-05-06 06:42:46,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2021-05-06 06:42:46,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:42:46,903 INFO L523 BasicCegarLoop]: trace histogram [196, 101, 95, 95, 61, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:42:47,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-06 06:42:47,104 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:42:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:42:47,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2029225717, now seen corresponding path program 100 times [2021-05-06 06:42:47,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:42:47,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042284710] [2021-05-06 06:42:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:42:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:42:51,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:42:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:42:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 47346 backedges. 19278 proven. 10302 refuted. 0 times theorem prover too weak. 17766 trivial. 0 not checked. [2021-05-06 06:42:51,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:42:51,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042284710] [2021-05-06 06:42:51,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042284710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:42:51,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178356369] [2021-05-06 06:42:51,065 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:42:51,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 06:42:51,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:42:51,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-06 06:42:51,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:42:51,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:42:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 47346 backedges. 19278 proven. 10302 refuted. 0 times theorem prover too weak. 17766 trivial. 0 not checked. [2021-05-06 06:42:51,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178356369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:42:51,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:42:51,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104] total 106 [2021-05-06 06:42:51,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710593132] [2021-05-06 06:42:51,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-06 06:42:51,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:42:51,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-06 06:42:51,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-06 06:42:51,928 INFO L87 Difference]: Start difference. First operand 594 states and 723 transitions. Second operand has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:42:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:42:58,777 INFO L93 Difference]: Finished difference Result 596 states and 725 transitions. [2021-05-06 06:42:58,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-06 06:42:58,778 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 2 states have call successors, (4), 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 593 [2021-05-06 06:42:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:42:58,779 INFO L225 Difference]: With dead ends: 596 [2021-05-06 06:42:58,779 INFO L226 Difference]: Without dead ends: 596 [2021-05-06 06:42:58,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5552 ImplicationChecksByTransitivity, 10169.0ms TimeCoverageRelationStatistics Valid=16173, Invalid=26883, Unknown=0, NotChecked=0, Total=43056 [2021-05-06 06:42:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-05-06 06:42:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2021-05-06 06:42:58,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 591 states have (on average 1.2199661590524535) internal successors, (721), 591 states have internal predecessors, (721), 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) [2021-05-06 06:42:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 725 transitions. [2021-05-06 06:42:58,783 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 725 transitions. Word has length 593 [2021-05-06 06:42:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:42:58,784 INFO L480 AbstractCegarLoop]: Abstraction has 596 states and 725 transitions. [2021-05-06 06:42:58,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:42:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 725 transitions. [2021-05-06 06:42:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2021-05-06 06:42:58,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:42:58,786 INFO L523 BasicCegarLoop]: trace histogram [197, 102, 95, 95, 61, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:42:58,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-06 06:42:58,987 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:42:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:42:58,987 INFO L82 PathProgramCache]: Analyzing trace with hash -718879191, now seen corresponding path program 101 times [2021-05-06 06:42:58,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:42:58,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549682588] [2021-05-06 06:42:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:42:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:43:03,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:43:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:43:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 47739 backedges. 19467 proven. 10506 refuted. 0 times theorem prover too weak. 17766 trivial. 0 not checked. [2021-05-06 06:43:03,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:43:03,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549682588] [2021-05-06 06:43:03,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549682588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:43:03,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787829314] [2021-05-06 06:43:03,022 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:43:03,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 131 check-sat command(s) [2021-05-06 06:43:03,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 06:43:03,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 06:43:03,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:43:03,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:03,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:04,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:05,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:06,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:07,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:08,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:09,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:10,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:10,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:43:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 47739 backedges. 27978 proven. 7881 refuted. 0 times theorem prover too weak. 11880 trivial. 0 not checked. [2021-05-06 06:43:10,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787829314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:43:10,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:43:10,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 67] total 171 [2021-05-06 06:43:10,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693720490] [2021-05-06 06:43:10,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 171 states [2021-05-06 06:43:10,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:43:10,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2021-05-06 06:43:10,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2021-05-06 06:43:10,322 INFO L87 Difference]: Start difference. First operand 596 states and 725 transitions. Second operand has 171 states, 171 states have (on average 2.783625730994152) internal successors, (476), 170 states have internal predecessors, (476), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:43:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:43:28,225 INFO L93 Difference]: Finished difference Result 614 states and 747 transitions. [2021-05-06 06:43:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-05-06 06:43:28,225 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 2.783625730994152) internal successors, (476), 170 states have internal predecessors, (476), 2 states have call successors, (4), 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 595 [2021-05-06 06:43:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:43:28,226 INFO L225 Difference]: With dead ends: 614 [2021-05-06 06:43:28,226 INFO L226 Difference]: Without dead ends: 614 [2021-05-06 06:43:28,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 934 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14130 ImplicationChecksByTransitivity, 26098.2ms TimeCoverageRelationStatistics Valid=43095, Invalid=71487, Unknown=0, NotChecked=0, Total=114582 [2021-05-06 06:43:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-05-06 06:43:28,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-05-06 06:43:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 609 states have (on average 1.2200328407224958) internal successors, (743), 609 states have internal predecessors, (743), 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) [2021-05-06 06:43:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 747 transitions. [2021-05-06 06:43:28,233 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 747 transitions. Word has length 595 [2021-05-06 06:43:28,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:43:28,233 INFO L480 AbstractCegarLoop]: Abstraction has 614 states and 747 transitions. [2021-05-06 06:43:28,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 171 states, 171 states have (on average 2.783625730994152) internal successors, (476), 170 states have internal predecessors, (476), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 06:43:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 747 transitions. [2021-05-06 06:43:28,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2021-05-06 06:43:28,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:43:28,237 INFO L523 BasicCegarLoop]: trace histogram [202, 103, 99, 99, 65, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:43:28,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:43:28,437 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:43:28,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:43:28,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1257569959, now seen corresponding path program 102 times [2021-05-06 06:43:28,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:43:28,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447122754] [2021-05-06 06:43:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:43:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat