/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/nla-digbench-scaling/egcd2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:14:20,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:14:20,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:14:20,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:14:20,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:14:20,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:14:20,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:14:20,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:14:20,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:14:20,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:14:20,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:14:20,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:14:20,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:14:20,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:14:20,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:14:20,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:14:20,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:14:20,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:14:20,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:14:20,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:14:20,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:14:20,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:14:20,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:14:20,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:14:20,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:14:20,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:14:20,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:14:20,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:14:20,074 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:14:20,088 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:14:20,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:14:20,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:14:20,091 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:14:20,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:14:20,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:14:20,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:14:20,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:14:20,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:14:20,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:14:20,092 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:14:20,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:14:20,092 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:14:20,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:14:20,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:14:20,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:14:20,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:14:20,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:14:20,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:14:20,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:14:20,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:14:20,094 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:14:20,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:14:20,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:14:20,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:14:20,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:14:20,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:14:20,365 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:14:20,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2021-05-06 08:14:20,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c742050e/b2c7e66c0a284b6d9cf4bb749c9afb8d/FLAG02ae25cc8 [2021-05-06 08:14:20,769 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:14:20,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2021-05-06 08:14:20,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c742050e/b2c7e66c0a284b6d9cf4bb749c9afb8d/FLAG02ae25cc8 [2021-05-06 08:14:20,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c742050e/b2c7e66c0a284b6d9cf4bb749c9afb8d [2021-05-06 08:14:20,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:14:20,790 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:14:20,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:14:20,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:14:20,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:14:20,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:14:20" (1/1) ... [2021-05-06 08:14:20,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510f0565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20, skipping insertion in model container [2021-05-06 08:14:20,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:14:20" (1/1) ... [2021-05-06 08:14:20,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:14:20,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:14:20,888 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2021-05-06 08:14:20,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:14:20,905 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:14:20,913 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2021-05-06 08:14:20,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:14:20,928 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:14:20,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20 WrapperNode [2021-05-06 08:14:20,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:14:20,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:14:20,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:14:20,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:14:20,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20" (1/1) ... [2021-05-06 08:14:20,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20" (1/1) ... [2021-05-06 08:14:20,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20" (1/1) ... [2021-05-06 08:14:20,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20" (1/1) ... [2021-05-06 08:14:20,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20" (1/1) ... [2021-05-06 08:14:20,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20" (1/1) ... [2021-05-06 08:14:20,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20" (1/1) ... [2021-05-06 08:14:20,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:14:20,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:14:20,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:14:20,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:14:20,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20" (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 08:14:21,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:14:21,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:14:21,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:14:21,038 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:14:21,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:14:21,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:14:21,039 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:14:21,039 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:14:21,039 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:14:21,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:14:21,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:14:21,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:14:21,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:14:21,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:14:21,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:14:21,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:14:21,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:14:21,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:14:21,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:14:21,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:14:21,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:14:21,259 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:14:21,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:14:21 BoogieIcfgContainer [2021-05-06 08:14:21,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:14:21,261 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:14:21,261 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:14:21,262 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:14:21,264 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:14:21" (1/1) ... [2021-05-06 08:14:21,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:14:21 BasicIcfg [2021-05-06 08:14:21,274 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:14:21,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:14:21,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:14:21,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:14:21,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:14:20" (1/4) ... [2021-05-06 08:14:21,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e7efa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:14:21, skipping insertion in model container [2021-05-06 08:14:21,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:14:20" (2/4) ... [2021-05-06 08:14:21,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e7efa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:14:21, skipping insertion in model container [2021-05-06 08:14:21,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:14:21" (3/4) ... [2021-05-06 08:14:21,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e7efa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:14:21, skipping insertion in model container [2021-05-06 08:14:21,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:14:21" (4/4) ... [2021-05-06 08:14:21,279 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.cJordan [2021-05-06 08:14:21,282 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:14:21,285 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:14:21,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:14:21,324 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:14:21,324 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:14:21,324 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:14:21,324 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:14:21,324 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:14:21,324 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:14:21,325 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:14:21,325 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:14:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:14:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 08:14:21,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:21,356 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:21,356 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:21,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:21,360 INFO L82 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2021-05-06 08:14:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:21,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639608221] [2021-05-06 08:14:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:21,475 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:21,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656928992] [2021-05-06 08:14:21,476 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 08:14:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:21,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:14:21,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:14:21,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:21,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639608221] [2021-05-06 08:14:21,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:21,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656928992] [2021-05-06 08:14:21,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656928992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:14:21,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:14:21,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:14:21,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139781029] [2021-05-06 08:14:21,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:14:21,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:21,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:14:21,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:14:21,657 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:14:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:21,667 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-06 08:14:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:14:21,668 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2021-05-06 08:14:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:21,672 INFO L225 Difference]: With dead ends: 39 [2021-05-06 08:14:21,673 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 08:14:21,674 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:14:21,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 08:14:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 08:14:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:14:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-06 08:14:21,699 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-06 08:14:21,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:21,700 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-06 08:14:21,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:14:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-06 08:14:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:14:21,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:21,702 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:21,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:14:21,917 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:21,919 INFO L82 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2021-05-06 08:14:21,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:21,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676742850] [2021-05-06 08:14:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:21,944 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:21,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107554255] [2021-05-06 08:14:21,944 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 08:14:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:14:22,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:22,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:14:22,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:22,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676742850] [2021-05-06 08:14:22,156 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:22,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107554255] [2021-05-06 08:14:22,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107554255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:14:22,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:14:22,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:14:22,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514408567] [2021-05-06 08:14:22,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:14:22,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:22,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:14:22,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:14:22,158 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:14:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:22,174 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-06 08:14:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:14:22,176 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), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:14:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:22,178 INFO L225 Difference]: With dead ends: 36 [2021-05-06 08:14:22,179 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 08:14:22,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:14:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 08:14:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 08:14:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:14:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-06 08:14:22,191 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-06 08:14:22,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:22,194 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-06 08:14:22,195 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), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:14:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-06 08:14:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:14:22,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:22,196 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:22,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:22,397 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:22,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2021-05-06 08:14:22,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:22,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336154969] [2021-05-06 08:14:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:22,408 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:22,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383347985] [2021-05-06 08:14:22,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:22,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:14:22,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:22,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:14:22,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:22,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336154969] [2021-05-06 08:14:22,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:22,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383347985] [2021-05-06 08:14:22,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383347985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:22,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:22,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:14:22,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057954438] [2021-05-06 08:14:22,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:14:22,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:22,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:14:22,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:14:22,559 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:14:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:22,627 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-05-06 08:14:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:14:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 08:14:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:22,630 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:14:22,631 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:14:22,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:14:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:14:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-06 08:14:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:14:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:14:22,644 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-06 08:14:22,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:22,644 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:14:22,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:14:22,644 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:14:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:14:22,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:22,646 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:22,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:22,849 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2021-05-06 08:14:22,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:22,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193838104] [2021-05-06 08:14:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:22,862 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:22,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241929529] [2021-05-06 08:14:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:22,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:14:22,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:22,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:14:23,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193838104] [2021-05-06 08:14:23,020 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241929529] [2021-05-06 08:14:23,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241929529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:23,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:23,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:14:23,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285874334] [2021-05-06 08:14:23,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:14:23,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:23,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:14:23,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:14:23,022 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:14:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:23,136 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2021-05-06 08:14:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:14:23,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:14:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:23,137 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:14:23,137 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 08:14:23,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:14:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 08:14:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-06 08:14:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:14:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-06 08:14:23,141 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-06 08:14:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:23,142 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-06 08:14:23,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:14:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-06 08:14:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:14:23,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:23,142 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:23,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:23,357 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:23,358 INFO L82 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2021-05-06 08:14:23,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:23,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057652651] [2021-05-06 08:14:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:23,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:23,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966078087] [2021-05-06 08:14:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:23,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:14:23,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:23,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:14:23,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:23,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057652651] [2021-05-06 08:14:23,534 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:23,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966078087] [2021-05-06 08:14:23,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966078087] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:14:23,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:14:23,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:14:23,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107789119] [2021-05-06 08:14:23,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:14:23,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:23,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:14:23,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:14:23,536 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:14:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:23,568 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-05-06 08:14:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:14:23,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:14:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:23,577 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:14:23,577 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:14:23,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:14:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:14:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 08:14:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:14:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-06 08:14:23,583 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-06 08:14:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:23,583 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-06 08:14:23,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:14:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-06 08:14:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:14:23,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:23,584 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:23,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:23,797 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2021-05-06 08:14:23,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:23,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531184599] [2021-05-06 08:14:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:23,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:23,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739267450] [2021-05-06 08:14:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:23,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:14:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:23,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:14:23,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:23,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531184599] [2021-05-06 08:14:23,996 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:23,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739267450] [2021-05-06 08:14:23,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739267450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:23,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:23,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:14:23,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272469553] [2021-05-06 08:14:23,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:14:23,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:14:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:14:24,000 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:14:24,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:24,118 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-06 08:14:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:14:24,118 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-06 08:14:24,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:24,119 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:14:24,119 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:14:24,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:14:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:14:24,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 08:14:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:14:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-06 08:14:24,124 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-06 08:14:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:24,124 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-06 08:14:24,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:14:24,124 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-06 08:14:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:14:24,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:24,125 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:24,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:24,329 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2021-05-06 08:14:24,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:24,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128411663] [2021-05-06 08:14:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:24,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:24,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940413515] [2021-05-06 08:14:24,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:24,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:14:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:24,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:14:24,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:24,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128411663] [2021-05-06 08:14:24,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:24,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940413515] [2021-05-06 08:14:24,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940413515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:24,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:24,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:14:24,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243510809] [2021-05-06 08:14:24,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:14:24,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:24,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:14:24,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:14:24,531 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:14:24,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:24,623 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2021-05-06 08:14:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:14:24,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:14:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:24,624 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:14:24,624 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:14:24,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:14:24,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:14:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 08:14:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:14:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-06 08:14:24,628 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-06 08:14:24,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:24,628 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-06 08:14:24,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:14:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-06 08:14:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:14:24,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:24,629 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:24,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:24,833 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2021-05-06 08:14:24,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:24,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646118011] [2021-05-06 08:14:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:24,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:24,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668435819] [2021-05-06 08:14:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order 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 08:14:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:24,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:14:24,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:24,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:24,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-06 08:14:25,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:25,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646118011] [2021-05-06 08:14:25,059 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:25,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668435819] [2021-05-06 08:14:25,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668435819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:25,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:25,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:14:25,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715293602] [2021-05-06 08:14:25,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:14:25,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:25,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:14:25,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:14:25,061 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:14:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:25,210 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-05-06 08:14:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:14:25,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 08:14:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:25,211 INFO L225 Difference]: With dead ends: 64 [2021-05-06 08:14:25,212 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 08:14:25,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:14:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 08:14:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 08:14:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:14:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-06 08:14:25,215 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-06 08:14:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:25,215 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-06 08:14:25,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:14:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-06 08:14:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:14:25,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:25,216 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:25,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:14:25,422 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:25,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1782154901, now seen corresponding path program 1 times [2021-05-06 08:14:25,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:25,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407205823] [2021-05-06 08:14:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:25,432 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:25,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085382536] [2021-05-06 08:14:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:25,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:14:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:25,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:14:25,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:25,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407205823] [2021-05-06 08:14:25,581 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:25,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085382536] [2021-05-06 08:14:25,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085382536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:25,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:25,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:14:25,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145178284] [2021-05-06 08:14:25,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:14:25,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:25,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:14:25,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:14:25,582 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:14:25,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:25,655 INFO L93 Difference]: Finished difference Result 94 states and 129 transitions. [2021-05-06 08:14:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:14:25,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-06 08:14:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:25,656 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:14:25,656 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 08:14:25,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:14:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 08:14:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-06 08:14:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:14:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-06 08:14:25,662 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-06 08:14:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:25,662 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-06 08:14:25,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:14:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-06 08:14:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 08:14:25,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:25,663 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:25,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:25,881 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:25,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:25,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2021-05-06 08:14:25,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:25,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153080962] [2021-05-06 08:14:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:25,888 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:25,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217116171] [2021-05-06 08:14:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:14:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:25,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:25,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:14:26,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:26,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153080962] [2021-05-06 08:14:26,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:26,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217116171] [2021-05-06 08:14:26,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217116171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:26,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:26,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:14:26,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618069077] [2021-05-06 08:14:26,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:14:26,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:26,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:14:26,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:14:26,038 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:14:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:26,080 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2021-05-06 08:14:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:14:26,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-06 08:14:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:26,081 INFO L225 Difference]: With dead ends: 99 [2021-05-06 08:14:26,081 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 08:14:26,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:14:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 08:14:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 08:14:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:14:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-06 08:14:26,088 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-06 08:14:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:26,088 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-06 08:14:26,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:14:26,089 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-06 08:14:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:14:26,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:26,089 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:26,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:26,293 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1491020248, now seen corresponding path program 1 times [2021-05-06 08:14:26,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:26,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930686754] [2021-05-06 08:14:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:26,301 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:26,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160313671] [2021-05-06 08:14:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:14:26,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:26,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:14:26,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930686754] [2021-05-06 08:14:26,472 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:26,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160313671] [2021-05-06 08:14:26,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160313671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:26,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:26,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:14:26,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524461529] [2021-05-06 08:14:26,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:14:26,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:26,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:14:26,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:14:26,473 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:14:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:26,628 INFO L93 Difference]: Finished difference Result 170 states and 243 transitions. [2021-05-06 08:14:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:14:26,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 08:14:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:26,631 INFO L225 Difference]: With dead ends: 170 [2021-05-06 08:14:26,631 INFO L226 Difference]: Without dead ends: 170 [2021-05-06 08:14:26,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:14:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-06 08:14:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-06 08:14:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:14:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-06 08:14:26,638 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-06 08:14:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:26,639 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-06 08:14:26,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:14:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-06 08:14:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 08:14:26,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:26,639 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:26,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:14:26,854 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1948826973, now seen corresponding path program 1 times [2021-05-06 08:14:26,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:26,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811324512] [2021-05-06 08:14:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:26,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:26,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036641709] [2021-05-06 08:14:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:26,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:14:26,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:26,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:26,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:14:27,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:27,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811324512] [2021-05-06 08:14:27,026 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:27,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036641709] [2021-05-06 08:14:27,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036641709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:27,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:27,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:14:27,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352354848] [2021-05-06 08:14:27,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:14:27,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:27,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:14:27,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:14:27,028 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:14:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:27,073 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-05-06 08:14:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:14:27,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-06 08:14:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:27,077 INFO L225 Difference]: With dead ends: 142 [2021-05-06 08:14:27,077 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 08:14:27,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:14:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 08:14:27,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-06 08:14:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:14:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-06 08:14:27,085 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-06 08:14:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:27,085 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-06 08:14:27,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:14:27,085 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-06 08:14:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:14:27,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:27,086 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:27,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:27,301 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1844620331, now seen corresponding path program 1 times [2021-05-06 08:14:27,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:27,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900192230] [2021-05-06 08:14:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:27,313 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:27,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454884311] [2021-05-06 08:14:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:27,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:14:27,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:27,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:14:27,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:27,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900192230] [2021-05-06 08:14:27,489 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:27,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454884311] [2021-05-06 08:14:27,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454884311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:27,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:27,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:14:27,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138119232] [2021-05-06 08:14:27,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:14:27,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:27,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:14:27,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:14:27,490 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:14:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:27,548 INFO L93 Difference]: Finished difference Result 169 states and 222 transitions. [2021-05-06 08:14:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:14:27,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-06 08:14:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:27,554 INFO L225 Difference]: With dead ends: 169 [2021-05-06 08:14:27,554 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 08:14:27,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:14:27,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 08:14:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-06 08:14:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:14:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-06 08:14:27,564 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-06 08:14:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:27,564 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-06 08:14:27,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:14:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-06 08:14:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:14:27,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:27,566 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:27,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:14:27,781 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:27,781 INFO L82 PathProgramCache]: Analyzing trace with hash 918639692, now seen corresponding path program 1 times [2021-05-06 08:14:27,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:27,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983482221] [2021-05-06 08:14:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:27,787 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:27,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880764266] [2021-05-06 08:14:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order 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 08:14:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:27,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:14:27,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:28,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:14:28,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:28,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983482221] [2021-05-06 08:14:28,034 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:28,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880764266] [2021-05-06 08:14:28,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880764266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:28,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:28,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:14:28,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604638710] [2021-05-06 08:14:28,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:14:28,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:28,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:14:28,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:14:28,036 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:14:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:28,151 INFO L93 Difference]: Finished difference Result 212 states and 294 transitions. [2021-05-06 08:14:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:14:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2021-05-06 08:14:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:28,152 INFO L225 Difference]: With dead ends: 212 [2021-05-06 08:14:28,152 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 08:14:28,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:14:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 08:14:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-05-06 08:14:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.2857142857142858) internal successors, (162), 132 states have internal predecessors, (162), 65 states have call successors, (65), 17 states have call predecessors, (65), 16 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:14:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 289 transitions. [2021-05-06 08:14:28,158 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 289 transitions. Word has length 68 [2021-05-06 08:14:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:28,159 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 289 transitions. [2021-05-06 08:14:28,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:14:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 289 transitions. [2021-05-06 08:14:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:14:28,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:28,159 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:28,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:28,375 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:28,376 INFO L82 PathProgramCache]: Analyzing trace with hash -210356579, now seen corresponding path program 2 times [2021-05-06 08:14:28,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:28,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557750017] [2021-05-06 08:14:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:28,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:28,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481494169] [2021-05-06 08:14:28,381 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 08:14:28,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:14:28,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:28,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:14:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:28,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 08:14:28,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:28,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557750017] [2021-05-06 08:14:28,640 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:28,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481494169] [2021-05-06 08:14:28,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481494169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:28,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:28,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:14:28,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232940742] [2021-05-06 08:14:28,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:14:28,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:28,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:14:28,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:14:28,641 INFO L87 Difference]: Start difference. First operand 208 states and 289 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:14:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:28,833 INFO L93 Difference]: Finished difference Result 214 states and 294 transitions. [2021-05-06 08:14:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:14:28,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-06 08:14:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:28,834 INFO L225 Difference]: With dead ends: 214 [2021-05-06 08:14:28,834 INFO L226 Difference]: Without dead ends: 214 [2021-05-06 08:14:28,834 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:14:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-06 08:14:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2021-05-06 08:14:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 129 states have (on average 1.2790697674418605) internal successors, (165), 135 states have internal predecessors, (165), 65 states have call successors, (65), 18 states have call predecessors, (65), 17 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:14:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 292 transitions. [2021-05-06 08:14:28,840 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 292 transitions. Word has length 73 [2021-05-06 08:14:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:28,840 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 292 transitions. [2021-05-06 08:14:28,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:14:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 292 transitions. [2021-05-06 08:14:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 08:14:28,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:28,841 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:29,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:14:29,049 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:29,049 INFO L82 PathProgramCache]: Analyzing trace with hash 952478412, now seen corresponding path program 3 times [2021-05-06 08:14:29,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:29,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277427501] [2021-05-06 08:14:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:29,054 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:29,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065461153] [2021-05-06 08:14:29,055 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 08:14:29,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:14:29,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:29,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:14:29,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:29,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 08:14:29,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:29,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277427501] [2021-05-06 08:14:29,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:29,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065461153] [2021-05-06 08:14:29,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065461153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:29,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:29,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:14:29,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036863267] [2021-05-06 08:14:29,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:14:29,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:29,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:14:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:14:29,436 INFO L87 Difference]: Start difference. First operand 212 states and 292 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:14:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:29,763 INFO L93 Difference]: Finished difference Result 222 states and 300 transitions. [2021-05-06 08:14:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:14:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-06 08:14:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:29,765 INFO L225 Difference]: With dead ends: 222 [2021-05-06 08:14:29,765 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 08:14:29,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:14:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 08:14:29,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2021-05-06 08:14:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 135 states have (on average 1.2666666666666666) internal successors, (171), 141 states have internal predecessors, (171), 65 states have call successors, (65), 20 states have call predecessors, (65), 19 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:14:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 298 transitions. [2021-05-06 08:14:29,771 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 298 transitions. Word has length 78 [2021-05-06 08:14:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:29,772 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 298 transitions. [2021-05-06 08:14:29,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:14:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 298 transitions. [2021-05-06 08:14:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 08:14:29,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:29,772 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:29,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:14:29,989 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1350616622, now seen corresponding path program 2 times [2021-05-06 08:14:29,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:29,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400479800] [2021-05-06 08:14:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:29,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:29,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152759471] [2021-05-06 08:14:29,999 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 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 08:14:30,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:14:30,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:30,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:14:30,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:30,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 08:14:30,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:30,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400479800] [2021-05-06 08:14:30,207 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:30,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152759471] [2021-05-06 08:14:30,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152759471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:30,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:30,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:14:30,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892688486] [2021-05-06 08:14:30,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:14:30,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:30,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:14:30,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:14:30,208 INFO L87 Difference]: Start difference. First operand 220 states and 298 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:14:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:30,369 INFO L93 Difference]: Finished difference Result 283 states and 405 transitions. [2021-05-06 08:14:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:14:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-05-06 08:14:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:30,371 INFO L225 Difference]: With dead ends: 283 [2021-05-06 08:14:30,371 INFO L226 Difference]: Without dead ends: 283 [2021-05-06 08:14:30,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:14:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-06 08:14:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 253. [2021-05-06 08:14:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 150 states have (on average 1.2933333333333332) internal successors, (194), 157 states have internal predecessors, (194), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 08:14:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 355 transitions. [2021-05-06 08:14:30,378 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 355 transitions. Word has length 82 [2021-05-06 08:14:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:30,378 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 355 transitions. [2021-05-06 08:14:30,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:14:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 355 transitions. [2021-05-06 08:14:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 08:14:30,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:30,379 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:30,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:14:30,589 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1080401827, now seen corresponding path program 1 times [2021-05-06 08:14:30,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:30,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115888828] [2021-05-06 08:14:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:30,594 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:30,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669967887] [2021-05-06 08:14:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:30,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:14:30,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:30,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 08:14:30,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115888828] [2021-05-06 08:14:30,780 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669967887] [2021-05-06 08:14:30,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669967887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:30,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:30,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:14:30,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365164933] [2021-05-06 08:14:30,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:14:30,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:14:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:14:30,781 INFO L87 Difference]: Start difference. First operand 253 states and 355 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:14:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:30,838 INFO L93 Difference]: Finished difference Result 256 states and 358 transitions. [2021-05-06 08:14:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:14:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-06 08:14:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:30,842 INFO L225 Difference]: With dead ends: 256 [2021-05-06 08:14:30,842 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 08:14:30,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:14:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 08:14:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-05-06 08:14:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 160 states have internal predecessors, (197), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 08:14:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 358 transitions. [2021-05-06 08:14:30,848 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 358 transitions. Word has length 83 [2021-05-06 08:14:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:30,850 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 358 transitions. [2021-05-06 08:14:30,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:14:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 358 transitions. [2021-05-06 08:14:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 08:14:30,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:30,851 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:31,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:14:31,057 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:31,057 INFO L82 PathProgramCache]: Analyzing trace with hash 900405455, now seen corresponding path program 1 times [2021-05-06 08:14:31,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:31,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900530791] [2021-05-06 08:14:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:31,064 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:31,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876666644] [2021-05-06 08:14:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 08:14:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:31,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 08:14:31,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:31,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900530791] [2021-05-06 08:14:31,280 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:31,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876666644] [2021-05-06 08:14:31,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876666644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:31,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:31,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:14:31,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851559038] [2021-05-06 08:14:31,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:14:31,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:31,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:14:31,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:14:31,282 INFO L87 Difference]: Start difference. First operand 256 states and 358 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:14:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:31,490 INFO L93 Difference]: Finished difference Result 287 states and 409 transitions. [2021-05-06 08:14:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:14:31,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2021-05-06 08:14:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:31,493 INFO L225 Difference]: With dead ends: 287 [2021-05-06 08:14:31,493 INFO L226 Difference]: Without dead ends: 286 [2021-05-06 08:14:31,493 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:14:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-06 08:14:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-06 08:14:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 168 states have (on average 1.3035714285714286) internal successors, (219), 176 states have internal predecessors, (219), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-06 08:14:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 406 transitions. [2021-05-06 08:14:31,500 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 406 transitions. Word has length 84 [2021-05-06 08:14:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:31,500 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 406 transitions. [2021-05-06 08:14:31,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:14:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 406 transitions. [2021-05-06 08:14:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:14:31,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:31,501 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:31,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:14:31,717 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2138218929, now seen corresponding path program 2 times [2021-05-06 08:14:31,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:31,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823023231] [2021-05-06 08:14:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:31,722 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:31,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199441162] [2021-05-06 08:14:31,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:31,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:14:31,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:31,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:14:31,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:31,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 08:14:31,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:31,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823023231] [2021-05-06 08:14:31,926 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:31,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199441162] [2021-05-06 08:14:31,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199441162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:31,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:31,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:14:31,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982525978] [2021-05-06 08:14:31,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:14:31,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:14:31,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:14:31,927 INFO L87 Difference]: Start difference. First operand 285 states and 406 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:14:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:32,003 INFO L93 Difference]: Finished difference Result 324 states and 442 transitions. [2021-05-06 08:14:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:14:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-06 08:14:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:32,005 INFO L225 Difference]: With dead ends: 324 [2021-05-06 08:14:32,005 INFO L226 Difference]: Without dead ends: 324 [2021-05-06 08:14:32,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:14:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-06 08:14:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-05-06 08:14:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 196 states have (on average 1.2653061224489797) internal successors, (248), 203 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 08:14:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 441 transitions. [2021-05-06 08:14:32,013 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 441 transitions. Word has length 87 [2021-05-06 08:14:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:32,013 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 441 transitions. [2021-05-06 08:14:32,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:14:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 441 transitions. [2021-05-06 08:14:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:14:32,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:32,014 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:32,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:14:32,223 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash 118626568, now seen corresponding path program 1 times [2021-05-06 08:14:32,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:32,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523590733] [2021-05-06 08:14:32,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:32,229 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:32,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399052231] [2021-05-06 08:14:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:32,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:14:32,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:32,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 08:14:32,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:32,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523590733] [2021-05-06 08:14:32,429 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:32,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399052231] [2021-05-06 08:14:32,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399052231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:32,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:32,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:14:32,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138592034] [2021-05-06 08:14:32,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:14:32,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:32,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:14:32,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:14:32,430 INFO L87 Difference]: Start difference. First operand 323 states and 441 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:14:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:32,508 INFO L93 Difference]: Finished difference Result 325 states and 441 transitions. [2021-05-06 08:14:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:14:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-06 08:14:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:32,509 INFO L225 Difference]: With dead ends: 325 [2021-05-06 08:14:32,509 INFO L226 Difference]: Without dead ends: 325 [2021-05-06 08:14:32,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:14:32,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-06 08:14:32,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-05-06 08:14:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 198 states have (on average 1.2525252525252526) internal successors, (248), 205 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 08:14:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 441 transitions. [2021-05-06 08:14:32,516 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 441 transitions. Word has length 89 [2021-05-06 08:14:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:32,516 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 441 transitions. [2021-05-06 08:14:32,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:14:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 441 transitions. [2021-05-06 08:14:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 08:14:32,517 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:32,517 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:32,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:14:32,729 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:32,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1881160278, now seen corresponding path program 2 times [2021-05-06 08:14:32,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:32,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916881836] [2021-05-06 08:14:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:32,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:32,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194251895] [2021-05-06 08:14:32,734 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 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 08:14:32,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:14:32,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:32,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:14:32,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:32,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-06 08:14:32,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:32,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916881836] [2021-05-06 08:14:32,914 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:32,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194251895] [2021-05-06 08:14:32,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194251895] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:14:32,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:14:32,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:14:32,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632927805] [2021-05-06 08:14:32,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:14:32,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:32,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:14:32,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:14:32,917 INFO L87 Difference]: Start difference. First operand 325 states and 441 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:14:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:32,975 INFO L93 Difference]: Finished difference Result 427 states and 611 transitions. [2021-05-06 08:14:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:14:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-06 08:14:32,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:32,977 INFO L225 Difference]: With dead ends: 427 [2021-05-06 08:14:32,977 INFO L226 Difference]: Without dead ends: 427 [2021-05-06 08:14:32,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:14:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-06 08:14:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 361. [2021-05-06 08:14:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 222 states have (on average 1.2657657657657657) internal successors, (281), 229 states have internal predecessors, (281), 110 states have call successors, (110), 29 states have call predecessors, (110), 28 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:14:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2021-05-06 08:14:32,987 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 93 [2021-05-06 08:14:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:32,987 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2021-05-06 08:14:32,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:14:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2021-05-06 08:14:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 08:14:32,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:32,989 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:33,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:33,205 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:33,206 INFO L82 PathProgramCache]: Analyzing trace with hash 653404933, now seen corresponding path program 1 times [2021-05-06 08:14:33,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:33,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437333628] [2021-05-06 08:14:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:33,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:33,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491963401] [2021-05-06 08:14:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:14:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:33,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 08:14:33,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:33,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 44 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-05-06 08:14:33,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:33,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437333628] [2021-05-06 08:14:33,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:33,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491963401] [2021-05-06 08:14:33,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491963401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:33,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:33,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:14:33,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683005285] [2021-05-06 08:14:33,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:14:33,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:33,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:14:33,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:14:33,754 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:14:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:34,180 INFO L93 Difference]: Finished difference Result 367 states and 503 transitions. [2021-05-06 08:14:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:14:34,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 08:14:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:34,182 INFO L225 Difference]: With dead ends: 367 [2021-05-06 08:14:34,182 INFO L226 Difference]: Without dead ends: 367 [2021-05-06 08:14:34,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:14:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-06 08:14:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-05-06 08:14:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 225 states have (on average 1.2622222222222221) internal successors, (284), 232 states have internal predecessors, (284), 110 states have call successors, (110), 30 states have call predecessors, (110), 29 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:14:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 501 transitions. [2021-05-06 08:14:34,190 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 501 transitions. Word has length 101 [2021-05-06 08:14:34,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:34,190 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 501 transitions. [2021-05-06 08:14:34,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:14:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 501 transitions. [2021-05-06 08:14:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:14:34,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:34,191 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:34,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:34,392 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1232145013, now seen corresponding path program 3 times [2021-05-06 08:14:34,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:34,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733382902] [2021-05-06 08:14:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:34,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:34,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534682688] [2021-05-06 08:14:34,397 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 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 08:14:34,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:14:34,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:34,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:14:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:34,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:34,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:34,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-06 08:14:34,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:34,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733382902] [2021-05-06 08:14:34,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:34,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534682688] [2021-05-06 08:14:34,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534682688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:34,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:34,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:14:34,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943661679] [2021-05-06 08:14:34,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:14:34,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:14:34,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:14:34,602 INFO L87 Difference]: Start difference. First operand 365 states and 501 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:14:34,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:34,653 INFO L93 Difference]: Finished difference Result 369 states and 504 transitions. [2021-05-06 08:14:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:14:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2021-05-06 08:14:34,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:34,655 INFO L225 Difference]: With dead ends: 369 [2021-05-06 08:14:34,655 INFO L226 Difference]: Without dead ends: 369 [2021-05-06 08:14:34,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:14:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-06 08:14:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2021-05-06 08:14:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 228 states have (on average 1.2587719298245614) internal successors, (287), 235 states have internal predecessors, (287), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:14:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 504 transitions. [2021-05-06 08:14:34,662 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 504 transitions. Word has length 105 [2021-05-06 08:14:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:34,663 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 504 transitions. [2021-05-06 08:14:34,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:14:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 504 transitions. [2021-05-06 08:14:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:14:34,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:34,664 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:34,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:34,881 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:34,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1212495288, now seen corresponding path program 2 times [2021-05-06 08:14:34,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:34,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096307803] [2021-05-06 08:14:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:34,886 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:34,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179432738] [2021-05-06 08:14:34,886 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 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 08:14:34,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:14:34,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:34,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:14:34,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:35,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-05-06 08:14:35,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:35,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096307803] [2021-05-06 08:14:35,235 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:35,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179432738] [2021-05-06 08:14:35,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179432738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:35,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:35,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:14:35,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444971262] [2021-05-06 08:14:35,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:14:35,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:14:35,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:14:35,236 INFO L87 Difference]: Start difference. First operand 369 states and 504 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:14:35,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:35,692 INFO L93 Difference]: Finished difference Result 401 states and 555 transitions. [2021-05-06 08:14:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:14:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2021-05-06 08:14:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:35,698 INFO L225 Difference]: With dead ends: 401 [2021-05-06 08:14:35,698 INFO L226 Difference]: Without dead ends: 400 [2021-05-06 08:14:35,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:14:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-06 08:14:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2021-05-06 08:14:35,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 251 states have internal predecessors, (308), 123 states have call successors, (123), 32 states have call predecessors, (123), 31 states have return successors, (120), 114 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-06 08:14:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 551 transitions. [2021-05-06 08:14:35,706 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 551 transitions. Word has length 107 [2021-05-06 08:14:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:35,706 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 551 transitions. [2021-05-06 08:14:35,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:14:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 551 transitions. [2021-05-06 08:14:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 08:14:35,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:35,707 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:35,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 08:14:35,921 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:35,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1392800366, now seen corresponding path program 2 times [2021-05-06 08:14:35,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:35,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145042754] [2021-05-06 08:14:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:35,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:35,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760162480] [2021-05-06 08:14:35,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:35,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:14:35,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:35,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:14:35,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:35,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:35,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:14:36,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145042754] [2021-05-06 08:14:36,136 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:36,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760162480] [2021-05-06 08:14:36,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760162480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:36,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:36,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:14:36,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249745778] [2021-05-06 08:14:36,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:14:36,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:14:36,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:14:36,140 INFO L87 Difference]: Start difference. First operand 398 states and 551 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:14:36,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:36,238 INFO L93 Difference]: Finished difference Result 450 states and 598 transitions. [2021-05-06 08:14:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:14:36,239 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2021-05-06 08:14:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:36,240 INFO L225 Difference]: With dead ends: 450 [2021-05-06 08:14:36,240 INFO L226 Difference]: Without dead ends: 450 [2021-05-06 08:14:36,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:14:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-06 08:14:36,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 449. [2021-05-06 08:14:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 280 states have (on average 1.2357142857142858) internal successors, (346), 288 states have internal predecessors, (346), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (124), 118 states have call predecessors, (124), 124 states have call successors, (124) [2021-05-06 08:14:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 597 transitions. [2021-05-06 08:14:36,250 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 597 transitions. Word has length 110 [2021-05-06 08:14:36,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:36,251 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 597 transitions. [2021-05-06 08:14:36,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:14:36,251 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 597 transitions. [2021-05-06 08:14:36,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:14:36,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:36,252 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:36,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:36,465 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash -194014662, now seen corresponding path program 3 times [2021-05-06 08:14:36,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:36,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557889329] [2021-05-06 08:14:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:36,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:36,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221597657] [2021-05-06 08:14:36,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:36,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:14:36,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:36,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:14:36,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:36,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-06 08:14:36,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:36,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557889329] [2021-05-06 08:14:36,709 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:36,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221597657] [2021-05-06 08:14:36,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221597657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:36,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:36,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:14:36,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856445016] [2021-05-06 08:14:36,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:14:36,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:36,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:14:36,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:14:36,710 INFO L87 Difference]: Start difference. First operand 449 states and 597 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:14:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:36,887 INFO L93 Difference]: Finished difference Result 625 states and 889 transitions. [2021-05-06 08:14:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:14:36,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2021-05-06 08:14:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:36,889 INFO L225 Difference]: With dead ends: 625 [2021-05-06 08:14:36,889 INFO L226 Difference]: Without dead ends: 625 [2021-05-06 08:14:36,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:14:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-05-06 08:14:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 488. [2021-05-06 08:14:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 307 states have (on average 1.250814332247557) internal successors, (384), 315 states have internal predecessors, (384), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 08:14:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 659 transitions. [2021-05-06 08:14:36,901 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 659 transitions. Word has length 111 [2021-05-06 08:14:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:36,901 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 659 transitions. [2021-05-06 08:14:36,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:14:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 659 transitions. [2021-05-06 08:14:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-06 08:14:36,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:36,902 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:37,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:14:37,121 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash -793672821, now seen corresponding path program 2 times [2021-05-06 08:14:37,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:37,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335875711] [2021-05-06 08:14:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:37,131 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:37,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982352835] [2021-05-06 08:14:37,132 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 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 08:14:37,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:14:37,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:14:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:37,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:14:37,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:37,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335875711] [2021-05-06 08:14:37,345 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:37,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982352835] [2021-05-06 08:14:37,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982352835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:37,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:37,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:14:37,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889687094] [2021-05-06 08:14:37,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:14:37,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:37,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:14:37,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:14:37,346 INFO L87 Difference]: Start difference. First operand 488 states and 659 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:14:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:37,456 INFO L93 Difference]: Finished difference Result 490 states and 658 transitions. [2021-05-06 08:14:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:14:37,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2021-05-06 08:14:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:37,458 INFO L225 Difference]: With dead ends: 490 [2021-05-06 08:14:37,458 INFO L226 Difference]: Without dead ends: 490 [2021-05-06 08:14:37,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:14:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-06 08:14:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2021-05-06 08:14:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 309 states have (on average 1.2394822006472492) internal successors, (383), 317 states have internal predecessors, (383), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 08:14:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 658 transitions. [2021-05-06 08:14:37,467 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 658 transitions. Word has length 112 [2021-05-06 08:14:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:37,467 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 658 transitions. [2021-05-06 08:14:37,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:14:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 658 transitions. [2021-05-06 08:14:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:14:37,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:37,468 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:37,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:37,681 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash 791718745, now seen corresponding path program 3 times [2021-05-06 08:14:37,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:37,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674304724] [2021-05-06 08:14:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:37,698 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:37,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996233276] [2021-05-06 08:14:37,698 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 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 08:14:37,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:14:37,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:37,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:14:37,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:37,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:14:37,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:37,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674304724] [2021-05-06 08:14:37,929 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:37,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996233276] [2021-05-06 08:14:37,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996233276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:37,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:37,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:14:37,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649236688] [2021-05-06 08:14:37,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:14:37,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:37,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:14:37,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:14:37,930 INFO L87 Difference]: Start difference. First operand 490 states and 658 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:14:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:38,059 INFO L93 Difference]: Finished difference Result 570 states and 733 transitions. [2021-05-06 08:14:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:14:38,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2021-05-06 08:14:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:38,062 INFO L225 Difference]: With dead ends: 570 [2021-05-06 08:14:38,062 INFO L226 Difference]: Without dead ends: 570 [2021-05-06 08:14:38,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:14:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-05-06 08:14:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2021-05-06 08:14:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 360 states have (on average 1.211111111111111) internal successors, (436), 368 states have internal predecessors, (436), 147 states have call successors, (147), 55 states have call predecessors, (147), 54 states have return successors, (143), 138 states have call predecessors, (143), 143 states have call successors, (143) [2021-05-06 08:14:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 726 transitions. [2021-05-06 08:14:38,073 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 726 transitions. Word has length 116 [2021-05-06 08:14:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:38,073 INFO L480 AbstractCegarLoop]: Abstraction has 562 states and 726 transitions. [2021-05-06 08:14:38,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:14:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 726 transitions. [2021-05-06 08:14:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 08:14:38,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:38,074 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:38,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 08:14:38,281 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1602469894, now seen corresponding path program 2 times [2021-05-06 08:14:38,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:38,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133085160] [2021-05-06 08:14:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:38,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:38,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501932703] [2021-05-06 08:14:38,289 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 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 08:14:38,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:14:38,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:38,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:14:38,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:38,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:38,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:38,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-05-06 08:14:38,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:38,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133085160] [2021-05-06 08:14:38,503 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:38,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501932703] [2021-05-06 08:14:38,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501932703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:38,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:38,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:14:38,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019894345] [2021-05-06 08:14:38,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:14:38,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:38,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:14:38,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:14:38,504 INFO L87 Difference]: Start difference. First operand 562 states and 726 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:14:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:38,700 INFO L93 Difference]: Finished difference Result 591 states and 766 transitions. [2021-05-06 08:14:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:14:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 118 [2021-05-06 08:14:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:38,703 INFO L225 Difference]: With dead ends: 591 [2021-05-06 08:14:38,703 INFO L226 Difference]: Without dead ends: 590 [2021-05-06 08:14:38,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:14:38,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-05-06 08:14:38,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 586. [2021-05-06 08:14:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 379 states have (on average 1.2189973614775726) internal successors, (462), 389 states have internal predecessors, (462), 151 states have call successors, (151), 56 states have call predecessors, (151), 55 states have return successors, (147), 140 states have call predecessors, (147), 147 states have call successors, (147) [2021-05-06 08:14:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2021-05-06 08:14:38,713 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 118 [2021-05-06 08:14:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:38,713 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2021-05-06 08:14:38,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:14:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2021-05-06 08:14:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 08:14:38,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:38,731 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:38,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:38,933 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1178507345, now seen corresponding path program 3 times [2021-05-06 08:14:38,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:38,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149666473] [2021-05-06 08:14:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:38,939 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:38,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206640076] [2021-05-06 08:14:38,939 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 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 08:14:39,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:14:39,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:14:39,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:39,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2021-05-06 08:14:39,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:39,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149666473] [2021-05-06 08:14:39,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:39,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206640076] [2021-05-06 08:14:39,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206640076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:39,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:39,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:14:39,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983123079] [2021-05-06 08:14:39,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:14:39,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:39,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:14:39,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:14:39,337 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:14:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:39,798 INFO L93 Difference]: Finished difference Result 638 states and 824 transitions. [2021-05-06 08:14:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:14:39,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 123 [2021-05-06 08:14:39,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:39,800 INFO L225 Difference]: With dead ends: 638 [2021-05-06 08:14:39,800 INFO L226 Difference]: Without dead ends: 638 [2021-05-06 08:14:39,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:14:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-05-06 08:14:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 632. [2021-05-06 08:14:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 406 states have (on average 1.2167487684729064) internal successors, (494), 417 states have internal predecessors, (494), 164 states have call successors, (164), 62 states have call predecessors, (164), 61 states have return successors, (160), 152 states have call predecessors, (160), 160 states have call successors, (160) [2021-05-06 08:14:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 818 transitions. [2021-05-06 08:14:39,810 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 818 transitions. Word has length 123 [2021-05-06 08:14:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:39,810 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 818 transitions. [2021-05-06 08:14:39,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:14:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 818 transitions. [2021-05-06 08:14:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 08:14:39,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:39,812 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:40,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:14:40,023 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:40,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:40,023 INFO L82 PathProgramCache]: Analyzing trace with hash -351372628, now seen corresponding path program 4 times [2021-05-06 08:14:40,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:40,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487601526] [2021-05-06 08:14:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:40,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:40,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497299113] [2021-05-06 08:14:40,028 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 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 08:14:40,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:14:40,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:40,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:14:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:40,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:40,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:41,109 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-06 08:14:41,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:41,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:41,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 71 proven. 52 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2021-05-06 08:14:41,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:41,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487601526] [2021-05-06 08:14:41,181 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:41,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497299113] [2021-05-06 08:14:41,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497299113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:41,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:41,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:14:41,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258443459] [2021-05-06 08:14:41,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:14:41,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:41,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:14:41,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:14:41,182 INFO L87 Difference]: Start difference. First operand 632 states and 818 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:14:42,707 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-06 08:14:43,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:43,501 INFO L93 Difference]: Finished difference Result 643 states and 827 transitions. [2021-05-06 08:14:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:14:43,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 124 [2021-05-06 08:14:43,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:43,503 INFO L225 Difference]: With dead ends: 643 [2021-05-06 08:14:43,503 INFO L226 Difference]: Without dead ends: 641 [2021-05-06 08:14:43,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1700.5ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:14:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-05-06 08:14:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 638. [2021-05-06 08:14:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 411 states have (on average 1.2116788321167884) internal successors, (498), 421 states have internal predecessors, (498), 164 states have call successors, (164), 64 states have call predecessors, (164), 62 states have return successors, (160), 152 states have call predecessors, (160), 160 states have call successors, (160) [2021-05-06 08:14:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 822 transitions. [2021-05-06 08:14:43,513 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 822 transitions. Word has length 124 [2021-05-06 08:14:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:43,514 INFO L480 AbstractCegarLoop]: Abstraction has 638 states and 822 transitions. [2021-05-06 08:14:43,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:14:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 822 transitions. [2021-05-06 08:14:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 08:14:43,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:43,515 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:43,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 08:14:43,729 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:43,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1703433466, now seen corresponding path program 5 times [2021-05-06 08:14:43,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:43,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469623629] [2021-05-06 08:14:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:43,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:43,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650434245] [2021-05-06 08:14:43,734 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 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 08:14:43,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:14:43,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:43,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-06 08:14:43,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:43,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:43,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:43,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:43,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:43,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:43,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 91 proven. 138 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-05-06 08:14:44,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:44,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469623629] [2021-05-06 08:14:44,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:44,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650434245] [2021-05-06 08:14:44,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650434245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:44,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:44,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:14:44,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058494623] [2021-05-06 08:14:44,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:14:44,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:44,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:14:44,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:14:44,205 INFO L87 Difference]: Start difference. First operand 638 states and 822 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:14:44,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:44,786 INFO L93 Difference]: Finished difference Result 648 states and 831 transitions. [2021-05-06 08:14:44,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:14:44,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2021-05-06 08:14:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:44,789 INFO L225 Difference]: With dead ends: 648 [2021-05-06 08:14:44,789 INFO L226 Difference]: Without dead ends: 648 [2021-05-06 08:14:44,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:14:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-05-06 08:14:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 642. [2021-05-06 08:14:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 414 states have (on average 1.210144927536232) internal successors, (501), 424 states have internal predecessors, (501), 164 states have call successors, (164), 65 states have call predecessors, (164), 63 states have return successors, (160), 152 states have call predecessors, (160), 160 states have call successors, (160) [2021-05-06 08:14:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 825 transitions. [2021-05-06 08:14:44,798 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 825 transitions. Word has length 128 [2021-05-06 08:14:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:44,799 INFO L480 AbstractCegarLoop]: Abstraction has 642 states and 825 transitions. [2021-05-06 08:14:44,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:14:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 825 transitions. [2021-05-06 08:14:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 08:14:44,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:44,800 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:45,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 08:14:45,002 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2058321745, now seen corresponding path program 4 times [2021-05-06 08:14:45,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:45,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127730415] [2021-05-06 08:14:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:45,010 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:45,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994853447] [2021-05-06 08:14:45,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:45,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:14:45,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 08:14:45,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:45,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 92 proven. 111 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-06 08:14:45,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:45,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127730415] [2021-05-06 08:14:45,508 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:45,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994853447] [2021-05-06 08:14:45,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994853447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:45,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:45,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:14:45,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433546781] [2021-05-06 08:14:45,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:14:45,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:45,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:14:45,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:14:45,509 INFO L87 Difference]: Start difference. First operand 642 states and 825 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-06 08:14:46,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:46,377 INFO L93 Difference]: Finished difference Result 676 states and 874 transitions. [2021-05-06 08:14:46,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:14:46,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 130 [2021-05-06 08:14:46,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:46,380 INFO L225 Difference]: With dead ends: 676 [2021-05-06 08:14:46,380 INFO L226 Difference]: Without dead ends: 673 [2021-05-06 08:14:46,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 295.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:14:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-05-06 08:14:46,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 669. [2021-05-06 08:14:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 427 states have (on average 1.2131147540983607) internal successors, (518), 438 states have internal predecessors, (518), 176 states have call successors, (176), 66 states have call predecessors, (176), 65 states have return successors, (173), 164 states have call predecessors, (173), 173 states have call successors, (173) [2021-05-06 08:14:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 867 transitions. [2021-05-06 08:14:46,390 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 867 transitions. Word has length 130 [2021-05-06 08:14:46,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:46,390 INFO L480 AbstractCegarLoop]: Abstraction has 669 states and 867 transitions. [2021-05-06 08:14:46,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-06 08:14:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 867 transitions. [2021-05-06 08:14:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-06 08:14:46,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:46,391 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:46,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 08:14:46,605 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:46,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1569660177, now seen corresponding path program 3 times [2021-05-06 08:14:46,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:46,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503478990] [2021-05-06 08:14:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:46,610 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:46,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019841184] [2021-05-06 08:14:46,610 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 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 08:14:46,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:14:46,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:14:46,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:46,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,881 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 08:14:46,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:46,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503478990] [2021-05-06 08:14:46,881 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:46,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019841184] [2021-05-06 08:14:46,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019841184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:46,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:46,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:14:46,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459419372] [2021-05-06 08:14:46,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:14:46,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:46,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:14:46,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:14:46,882 INFO L87 Difference]: Start difference. First operand 669 states and 867 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:14:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:47,024 INFO L93 Difference]: Finished difference Result 678 states and 876 transitions. [2021-05-06 08:14:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:14:47,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2021-05-06 08:14:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:47,027 INFO L225 Difference]: With dead ends: 678 [2021-05-06 08:14:47,027 INFO L226 Difference]: Without dead ends: 678 [2021-05-06 08:14:47,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:14:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-05-06 08:14:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 678. [2021-05-06 08:14:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 436 states have (on average 1.2087155963302751) internal successors, (527), 447 states have internal predecessors, (527), 176 states have call successors, (176), 66 states have call predecessors, (176), 65 states have return successors, (173), 164 states have call predecessors, (173), 173 states have call successors, (173) [2021-05-06 08:14:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 876 transitions. [2021-05-06 08:14:47,036 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 876 transitions. Word has length 133 [2021-05-06 08:14:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:47,037 INFO L480 AbstractCegarLoop]: Abstraction has 678 states and 876 transitions. [2021-05-06 08:14:47,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:14:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 876 transitions. [2021-05-06 08:14:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 08:14:47,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:47,038 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:47,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:47,254 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:47,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1381701507, now seen corresponding path program 5 times [2021-05-06 08:14:47,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:47,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618688603] [2021-05-06 08:14:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:47,259 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:47,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055906414] [2021-05-06 08:14:47,259 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 08:14:47,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:14:47,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:47,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:14:47,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:47,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:47,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2021-05-06 08:14:48,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:48,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618688603] [2021-05-06 08:14:48,016 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:48,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055906414] [2021-05-06 08:14:48,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055906414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:48,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:48,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:14:48,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373379774] [2021-05-06 08:14:48,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:14:48,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:48,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:14:48,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:14:48,017 INFO L87 Difference]: Start difference. First operand 678 states and 876 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:14:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:48,867 INFO L93 Difference]: Finished difference Result 719 states and 935 transitions. [2021-05-06 08:14:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:14:48,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 134 [2021-05-06 08:14:48,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:48,870 INFO L225 Difference]: With dead ends: 719 [2021-05-06 08:14:48,870 INFO L226 Difference]: Without dead ends: 718 [2021-05-06 08:14:48,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 358.8ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:14:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-05-06 08:14:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 711. [2021-05-06 08:14:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 454 states have (on average 1.2136563876651982) internal successors, (551), 466 states have internal predecessors, (551), 189 states have call successors, (189), 68 states have call predecessors, (189), 67 states have return successors, (186), 176 states have call predecessors, (186), 186 states have call successors, (186) [2021-05-06 08:14:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 926 transitions. [2021-05-06 08:14:48,880 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 926 transitions. Word has length 134 [2021-05-06 08:14:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:48,881 INFO L480 AbstractCegarLoop]: Abstraction has 711 states and 926 transitions. [2021-05-06 08:14:48,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:14:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 926 transitions. [2021-05-06 08:14:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-06 08:14:48,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:48,882 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:49,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-06 08:14:49,089 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:49,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:49,089 INFO L82 PathProgramCache]: Analyzing trace with hash 114091546, now seen corresponding path program 4 times [2021-05-06 08:14:49,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:49,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514300691] [2021-05-06 08:14:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:49,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:49,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742549891] [2021-05-06 08:14:49,100 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 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 08:14:49,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:14:49,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:49,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:14:49,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:49,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 444 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 08:14:49,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:49,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514300691] [2021-05-06 08:14:49,386 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:49,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742549891] [2021-05-06 08:14:49,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742549891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:49,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:49,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:14:49,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638720235] [2021-05-06 08:14:49,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:14:49,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:49,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:14:49,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:14:49,387 INFO L87 Difference]: Start difference. First operand 711 states and 926 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:14:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:49,546 INFO L93 Difference]: Finished difference Result 816 states and 1025 transitions. [2021-05-06 08:14:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:14:49,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 139 [2021-05-06 08:14:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:49,548 INFO L225 Difference]: With dead ends: 816 [2021-05-06 08:14:49,549 INFO L226 Difference]: Without dead ends: 816 [2021-05-06 08:14:49,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:14:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-05-06 08:14:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 791. [2021-05-06 08:14:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 511 states have (on average 1.187866927592955) internal successors, (607), 523 states have internal predecessors, (607), 197 states have call successors, (197), 83 states have call predecessors, (197), 82 states have return successors, (193), 184 states have call predecessors, (193), 193 states have call successors, (193) [2021-05-06 08:14:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 997 transitions. [2021-05-06 08:14:49,559 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 997 transitions. Word has length 139 [2021-05-06 08:14:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:49,560 INFO L480 AbstractCegarLoop]: Abstraction has 791 states and 997 transitions. [2021-05-06 08:14:49,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:14:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 997 transitions. [2021-05-06 08:14:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 08:14:49,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:49,561 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:49,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 08:14:49,777 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:49,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:49,777 INFO L82 PathProgramCache]: Analyzing trace with hash -175935466, now seen corresponding path program 6 times [2021-05-06 08:14:49,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:49,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587755340] [2021-05-06 08:14:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:49,781 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:49,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011875637] [2021-05-06 08:14:49,781 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 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 08:14:50,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:14:50,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:50,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 08:14:50,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:50,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-05-06 08:14:50,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:50,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587755340] [2021-05-06 08:14:50,579 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:50,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011875637] [2021-05-06 08:14:50,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011875637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:50,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:50,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:14:50,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20308847] [2021-05-06 08:14:50,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:14:50,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:50,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:14:50,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:14:50,581 INFO L87 Difference]: Start difference. First operand 791 states and 997 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:14:51,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:51,824 INFO L93 Difference]: Finished difference Result 862 states and 1091 transitions. [2021-05-06 08:14:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:14:51,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 146 [2021-05-06 08:14:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:51,827 INFO L225 Difference]: With dead ends: 862 [2021-05-06 08:14:51,827 INFO L226 Difference]: Without dead ends: 862 [2021-05-06 08:14:51,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:14:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-05-06 08:14:51,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 849. [2021-05-06 08:14:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 546 states have (on average 1.1941391941391941) internal successors, (652), 560 states have internal predecessors, (652), 215 states have call successors, (215), 88 states have call predecessors, (215), 87 states have return successors, (211), 200 states have call predecessors, (211), 211 states have call successors, (211) [2021-05-06 08:14:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1078 transitions. [2021-05-06 08:14:51,850 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1078 transitions. Word has length 146 [2021-05-06 08:14:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:51,850 INFO L480 AbstractCegarLoop]: Abstraction has 849 states and 1078 transitions. [2021-05-06 08:14:51,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:14:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1078 transitions. [2021-05-06 08:14:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-06 08:14:51,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:51,852 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:52,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 08:14:52,059 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash 663584549, now seen corresponding path program 7 times [2021-05-06 08:14:52,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:52,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88817049] [2021-05-06 08:14:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:52,064 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:52,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583480574] [2021-05-06 08:14:52,064 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 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 08:14:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:52,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:14:52,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:52,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-05-06 08:14:52,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:52,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88817049] [2021-05-06 08:14:52,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:52,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583480574] [2021-05-06 08:14:52,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583480574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:52,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:52,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:14:52,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504387347] [2021-05-06 08:14:52,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:14:52,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:52,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:14:52,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:14:52,483 INFO L87 Difference]: Start difference. First operand 849 states and 1078 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:14:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:53,053 INFO L93 Difference]: Finished difference Result 860 states and 1087 transitions. [2021-05-06 08:14:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:14:53,054 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 147 [2021-05-06 08:14:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:53,056 INFO L225 Difference]: With dead ends: 860 [2021-05-06 08:14:53,056 INFO L226 Difference]: Without dead ends: 858 [2021-05-06 08:14:53,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:14:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-05-06 08:14:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 855. [2021-05-06 08:14:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 551 states have (on average 1.190562613430127) internal successors, (656), 564 states have internal predecessors, (656), 215 states have call successors, (215), 90 states have call predecessors, (215), 88 states have return successors, (211), 200 states have call predecessors, (211), 211 states have call successors, (211) [2021-05-06 08:14:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1082 transitions. [2021-05-06 08:14:53,068 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1082 transitions. Word has length 147 [2021-05-06 08:14:53,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:53,068 INFO L480 AbstractCegarLoop]: Abstraction has 855 states and 1082 transitions. [2021-05-06 08:14:53,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:14:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1082 transitions. [2021-05-06 08:14:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 08:14:53,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:53,069 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:53,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 08:14:53,289 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 286780695, now seen corresponding path program 8 times [2021-05-06 08:14:53,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:53,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449023426] [2021-05-06 08:14:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:53,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:53,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210687635] [2021-05-06 08:14:53,293 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 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 08:14:53,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:14:53,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 08:14:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:53,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-05-06 08:14:53,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:53,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449023426] [2021-05-06 08:14:53,741 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:53,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210687635] [2021-05-06 08:14:53,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210687635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:53,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:53,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:14:53,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895731460] [2021-05-06 08:14:53,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:14:53,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:53,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:14:53,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:14:53,743 INFO L87 Difference]: Start difference. First operand 855 states and 1082 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:14:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:54,360 INFO L93 Difference]: Finished difference Result 865 states and 1091 transitions. [2021-05-06 08:14:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:14:54,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 151 [2021-05-06 08:14:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:54,363 INFO L225 Difference]: With dead ends: 865 [2021-05-06 08:14:54,363 INFO L226 Difference]: Without dead ends: 865 [2021-05-06 08:14:54,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:14:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-05-06 08:14:54,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 859. [2021-05-06 08:14:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 554 states have (on average 1.1895306859205776) internal successors, (659), 567 states have internal predecessors, (659), 215 states have call successors, (215), 91 states have call predecessors, (215), 89 states have return successors, (211), 200 states have call predecessors, (211), 211 states have call successors, (211) [2021-05-06 08:14:54,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1085 transitions. [2021-05-06 08:14:54,375 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1085 transitions. Word has length 151 [2021-05-06 08:14:54,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:54,375 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 1085 transitions. [2021-05-06 08:14:54,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:14:54,375 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1085 transitions. [2021-05-06 08:14:54,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 08:14:54,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:54,377 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:54,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:54,593 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:54,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:54,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1987152653, now seen corresponding path program 9 times [2021-05-06 08:14:54,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:54,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383099504] [2021-05-06 08:14:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:54,598 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:54,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237536545] [2021-05-06 08:14:54,598 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 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 08:14:54,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:14:54,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:54,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 08:14:54,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:54,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:54,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:55,155 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-06 08:14:55,543 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 08:14:56,387 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-06 08:14:56,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:56,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:56,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:56,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:56,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:56,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:56,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:56,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:56,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 132 proven. 77 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-06 08:14:56,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:56,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383099504] [2021-05-06 08:14:56,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:56,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237536545] [2021-05-06 08:14:56,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237536545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:56,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:56,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:14:56,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200873723] [2021-05-06 08:14:56,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:14:56,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:56,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:14:56,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:14:56,904 INFO L87 Difference]: Start difference. First operand 859 states and 1085 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-06 08:14:57,468 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-06 08:14:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:59,757 INFO L93 Difference]: Finished difference Result 884 states and 1107 transitions. [2021-05-06 08:14:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:14:59,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 151 [2021-05-06 08:14:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:59,760 INFO L225 Difference]: With dead ends: 884 [2021-05-06 08:14:59,760 INFO L226 Difference]: Without dead ends: 884 [2021-05-06 08:14:59,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 2072.9ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:14:59,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-05-06 08:14:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 871. [2021-05-06 08:14:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 563 states have (on average 1.1865008880994672) internal successors, (668), 576 states have internal predecessors, (668), 215 states have call successors, (215), 94 states have call predecessors, (215), 92 states have return successors, (211), 200 states have call predecessors, (211), 211 states have call successors, (211) [2021-05-06 08:14:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1094 transitions. [2021-05-06 08:14:59,772 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1094 transitions. Word has length 151 [2021-05-06 08:14:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:59,772 INFO L480 AbstractCegarLoop]: Abstraction has 871 states and 1094 transitions. [2021-05-06 08:14:59,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-06 08:14:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1094 transitions. [2021-05-06 08:14:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-06 08:14:59,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:59,773 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:59,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 08:14:59,993 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1068595608, now seen corresponding path program 6 times [2021-05-06 08:14:59,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:59,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215503109] [2021-05-06 08:14:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:59,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:59,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073535978] [2021-05-06 08:14:59,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:00,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:15:00,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:00,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:15:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:00,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 87 proven. 29 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2021-05-06 08:15:00,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:00,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215503109] [2021-05-06 08:15:00,353 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:00,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073535978] [2021-05-06 08:15:00,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073535978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:00,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:00,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:15:00,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975644988] [2021-05-06 08:15:00,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:15:00,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:00,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:15:00,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:15:00,354 INFO L87 Difference]: Start difference. First operand 871 states and 1094 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 08:15:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:00,520 INFO L93 Difference]: Finished difference Result 895 states and 1113 transitions. [2021-05-06 08:15:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:15:00,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 153 [2021-05-06 08:15:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:00,523 INFO L225 Difference]: With dead ends: 895 [2021-05-06 08:15:00,523 INFO L226 Difference]: Without dead ends: 891 [2021-05-06 08:15:00,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:15:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-05-06 08:15:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 884. [2021-05-06 08:15:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 573 states have (on average 1.1780104712041886) internal successors, (675), 586 states have internal predecessors, (675), 214 states have call successors, (214), 97 states have call predecessors, (214), 96 states have return successors, (211), 200 states have call predecessors, (211), 211 states have call successors, (211) [2021-05-06 08:15:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1100 transitions. [2021-05-06 08:15:00,535 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1100 transitions. Word has length 153 [2021-05-06 08:15:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:00,535 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 1100 transitions. [2021-05-06 08:15:00,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 08:15:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1100 transitions. [2021-05-06 08:15:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 08:15:00,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:00,537 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:00,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:00,757 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1784468722, now seen corresponding path program 4 times [2021-05-06 08:15:00,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:00,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552786951] [2021-05-06 08:15:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:00,762 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:00,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863173894] [2021-05-06 08:15:00,762 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 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 08:15:00,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:15:00,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:00,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:15:00,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:00,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 718 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:15:01,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:01,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552786951] [2021-05-06 08:15:01,057 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:01,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863173894] [2021-05-06 08:15:01,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863173894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:01,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:01,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:15:01,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113863930] [2021-05-06 08:15:01,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:15:01,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:01,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:15:01,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:15:01,058 INFO L87 Difference]: Start difference. First operand 884 states and 1100 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:15:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:01,204 INFO L93 Difference]: Finished difference Result 896 states and 1112 transitions. [2021-05-06 08:15:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:15:01,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 156 [2021-05-06 08:15:01,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:01,207 INFO L225 Difference]: With dead ends: 896 [2021-05-06 08:15:01,207 INFO L226 Difference]: Without dead ends: 896 [2021-05-06 08:15:01,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:15:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-05-06 08:15:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2021-05-06 08:15:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 585 states have (on average 1.1743589743589744) internal successors, (687), 598 states have internal predecessors, (687), 214 states have call successors, (214), 97 states have call predecessors, (214), 96 states have return successors, (211), 200 states have call predecessors, (211), 211 states have call successors, (211) [2021-05-06 08:15:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1112 transitions. [2021-05-06 08:15:01,218 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1112 transitions. Word has length 156 [2021-05-06 08:15:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:01,218 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 1112 transitions. [2021-05-06 08:15:01,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:15:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1112 transitions. [2021-05-06 08:15:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 08:15:01,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:01,220 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:01,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:01,433 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:01,433 INFO L82 PathProgramCache]: Analyzing trace with hash -482920742, now seen corresponding path program 7 times [2021-05-06 08:15:01,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:01,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661567798] [2021-05-06 08:15:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:01,438 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:01,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972216086] [2021-05-06 08:15:01,438 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 08:15:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:01,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:15:01,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:01,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:02,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:02,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:02,761 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-06 08:15:02,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:02,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:02,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:02,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:03,244 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-05-06 08:15:05,364 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-06 08:15:06,186 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-06 08:15:06,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 228 proven. 93 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-05-06 08:15:06,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:06,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661567798] [2021-05-06 08:15:06,495 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:06,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972216086] [2021-05-06 08:15:06,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972216086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:06,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:06,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 08:15:06,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373336343] [2021-05-06 08:15:06,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 08:15:06,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:06,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 08:15:06,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:15:06,496 INFO L87 Difference]: Start difference. First operand 896 states and 1112 transitions. Second operand has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-06 08:15:12,494 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-06 08:15:13,895 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-06 08:15:14,956 WARN L205 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-05-06 08:15:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:17,142 INFO L93 Difference]: Finished difference Result 937 states and 1171 transitions. [2021-05-06 08:15:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:15:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) Word has length 157 [2021-05-06 08:15:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:17,145 INFO L225 Difference]: With dead ends: 937 [2021-05-06 08:15:17,145 INFO L226 Difference]: Without dead ends: 936 [2021-05-06 08:15:17,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 7990.6ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:15:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-05-06 08:15:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 929. [2021-05-06 08:15:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 603 states have (on average 1.1791044776119404) internal successors, (711), 617 states have internal predecessors, (711), 227 states have call successors, (227), 99 states have call predecessors, (227), 98 states have return successors, (224), 212 states have call predecessors, (224), 224 states have call successors, (224) [2021-05-06 08:15:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1162 transitions. [2021-05-06 08:15:17,156 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1162 transitions. Word has length 157 [2021-05-06 08:15:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:17,157 INFO L480 AbstractCegarLoop]: Abstraction has 929 states and 1162 transitions. [2021-05-06 08:15:17,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-06 08:15:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1162 transitions. [2021-05-06 08:15:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 08:15:17,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:17,158 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:17,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-06 08:15:17,375 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:17,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:17,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1975031370, now seen corresponding path program 8 times [2021-05-06 08:15:17,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:17,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60911295] [2021-05-06 08:15:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:17,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:17,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479189968] [2021-05-06 08:15:17,380 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 08:15:17,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:17,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:17,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 102 conjunts are in the unsatisfiable core [2021-05-06 08:15:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:18,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:18,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:18,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 222 proven. 171 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2021-05-06 08:15:18,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:18,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60911295] [2021-05-06 08:15:18,087 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:18,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479189968] [2021-05-06 08:15:18,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479189968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:18,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:18,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:15:18,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025874587] [2021-05-06 08:15:18,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:15:18,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:18,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:15:18,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:15:18,089 INFO L87 Difference]: Start difference. First operand 929 states and 1162 transitions. Second operand has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:15:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:19,116 INFO L93 Difference]: Finished difference Result 1001 states and 1252 transitions. [2021-05-06 08:15:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:15:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) Word has length 157 [2021-05-06 08:15:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:19,121 INFO L225 Difference]: With dead ends: 1001 [2021-05-06 08:15:19,121 INFO L226 Difference]: Without dead ends: 1000 [2021-05-06 08:15:19,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:15:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-05-06 08:15:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 963. [2021-05-06 08:15:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 627 states have (on average 1.1770334928229664) internal successors, (738), 641 states have internal predecessors, (738), 231 states have call successors, (231), 105 states have call predecessors, (231), 104 states have return successors, (228), 216 states have call predecessors, (228), 228 states have call successors, (228) [2021-05-06 08:15:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1197 transitions. [2021-05-06 08:15:19,132 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1197 transitions. Word has length 157 [2021-05-06 08:15:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:19,132 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 1197 transitions. [2021-05-06 08:15:19,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:15:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1197 transitions. [2021-05-06 08:15:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 08:15:19,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:19,134 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:19,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-06 08:15:19,341 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:19,341 INFO L82 PathProgramCache]: Analyzing trace with hash 827981760, now seen corresponding path program 5 times [2021-05-06 08:15:19,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:19,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717448352] [2021-05-06 08:15:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:19,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:19,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56631524] [2021-05-06 08:15:19,346 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 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 08:15:19,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:15:19,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:19,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:15:19,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:19,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 40 proven. 728 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:15:19,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:19,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717448352] [2021-05-06 08:15:19,837 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:19,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56631524] [2021-05-06 08:15:19,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56631524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:19,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:19,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:15:19,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051490888] [2021-05-06 08:15:19,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:15:19,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:19,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:15:19,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:15:19,838 INFO L87 Difference]: Start difference. First operand 963 states and 1197 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:15:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:20,015 INFO L93 Difference]: Finished difference Result 1127 states and 1361 transitions. [2021-05-06 08:15:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:15:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 160 [2021-05-06 08:15:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:20,019 INFO L225 Difference]: With dead ends: 1127 [2021-05-06 08:15:20,019 INFO L226 Difference]: Without dead ends: 1127 [2021-05-06 08:15:20,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:15:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-05-06 08:15:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1092. [2021-05-06 08:15:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 712 states have (on average 1.1601123595505618) internal successors, (826), 727 states have internal predecessors, (826), 250 states have call successors, (250), 130 states have call predecessors, (250), 129 states have return successors, (247), 234 states have call predecessors, (247), 247 states have call successors, (247) [2021-05-06 08:15:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1323 transitions. [2021-05-06 08:15:20,030 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1323 transitions. Word has length 160 [2021-05-06 08:15:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:20,030 INFO L480 AbstractCegarLoop]: Abstraction has 1092 states and 1323 transitions. [2021-05-06 08:15:20,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:15:20,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1323 transitions. [2021-05-06 08:15:20,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-06 08:15:20,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:20,032 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:20,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-06 08:15:20,241 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1220795847, now seen corresponding path program 5 times [2021-05-06 08:15:20,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:20,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074104860] [2021-05-06 08:15:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:20,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:20,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684029154] [2021-05-06 08:15:20,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:20,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:15:20,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:20,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:15:20,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:20,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 48 proven. 730 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:15:20,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:20,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074104860] [2021-05-06 08:15:20,744 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:20,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684029154] [2021-05-06 08:15:20,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684029154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:20,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:20,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:15:20,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846492836] [2021-05-06 08:15:20,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:15:20,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:20,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:15:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:15:20,745 INFO L87 Difference]: Start difference. First operand 1092 states and 1323 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:15:20,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:20,935 INFO L93 Difference]: Finished difference Result 1120 states and 1345 transitions. [2021-05-06 08:15:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:15:20,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 162 [2021-05-06 08:15:20,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:20,938 INFO L225 Difference]: With dead ends: 1120 [2021-05-06 08:15:20,938 INFO L226 Difference]: Without dead ends: 1120 [2021-05-06 08:15:20,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:15:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-05-06 08:15:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1112. [2021-05-06 08:15:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 732 states have (on average 1.1489071038251366) internal successors, (841), 745 states have internal predecessors, (841), 250 states have call successors, (250), 130 states have call predecessors, (250), 129 states have return successors, (247), 236 states have call predecessors, (247), 247 states have call successors, (247) [2021-05-06 08:15:20,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1338 transitions. [2021-05-06 08:15:20,949 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1338 transitions. Word has length 162 [2021-05-06 08:15:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:20,949 INFO L480 AbstractCegarLoop]: Abstraction has 1112 states and 1338 transitions. [2021-05-06 08:15:20,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:15:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1338 transitions. [2021-05-06 08:15:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-06 08:15:20,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:20,951 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:21,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:21,156 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2094023431, now seen corresponding path program 6 times [2021-05-06 08:15:21,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:21,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488564773] [2021-05-06 08:15:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:21,161 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:21,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641394616] [2021-05-06 08:15:21,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:22,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-06 08:15:22,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:22,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:15:22,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:22,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 51 proven. 741 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:15:22,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:22,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488564773] [2021-05-06 08:15:22,390 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:22,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641394616] [2021-05-06 08:15:22,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641394616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:22,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:22,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:15:22,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396281082] [2021-05-06 08:15:22,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:15:22,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:22,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:15:22,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:15:22,391 INFO L87 Difference]: Start difference. First operand 1112 states and 1338 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:15:22,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:22,647 INFO L93 Difference]: Finished difference Result 1320 states and 1558 transitions. [2021-05-06 08:15:22,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:15:22,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 166 [2021-05-06 08:15:22,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:22,650 INFO L225 Difference]: With dead ends: 1320 [2021-05-06 08:15:22,650 INFO L226 Difference]: Without dead ends: 1320 [2021-05-06 08:15:22,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:15:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-05-06 08:15:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1298. [2021-05-06 08:15:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 853 states have (on average 1.1359906213364594) internal successors, (969), 866 states have internal predecessors, (969), 286 states have call successors, (286), 159 states have call predecessors, (286), 158 states have return successors, (282), 272 states have call predecessors, (282), 282 states have call successors, (282) [2021-05-06 08:15:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1537 transitions. [2021-05-06 08:15:22,664 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1537 transitions. Word has length 166 [2021-05-06 08:15:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:22,664 INFO L480 AbstractCegarLoop]: Abstraction has 1298 states and 1537 transitions. [2021-05-06 08:15:22,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:15:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1537 transitions. [2021-05-06 08:15:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-06 08:15:22,666 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:22,666 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:22,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:22,889 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:22,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:22,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1864794764, now seen corresponding path program 10 times [2021-05-06 08:15:22,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:22,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101602398] [2021-05-06 08:15:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:22,893 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:22,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17322522] [2021-05-06 08:15:22,893 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 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 08:15:22,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:15:22,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:22,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:15:22,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:22,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:22,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 166 proven. 298 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2021-05-06 08:15:23,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101602398] [2021-05-06 08:15:23,691 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17322522] [2021-05-06 08:15:23,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17322522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:23,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:23,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:15:23,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176148905] [2021-05-06 08:15:23,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:15:23,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:23,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:15:23,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:15:23,692 INFO L87 Difference]: Start difference. First operand 1298 states and 1537 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:15:25,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:25,106 INFO L93 Difference]: Finished difference Result 1321 states and 1563 transitions. [2021-05-06 08:15:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:15:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) Word has length 170 [2021-05-06 08:15:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:25,112 INFO L225 Difference]: With dead ends: 1321 [2021-05-06 08:15:25,112 INFO L226 Difference]: Without dead ends: 1321 [2021-05-06 08:15:25,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:15:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-05-06 08:15:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1303. [2021-05-06 08:15:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 856 states have (on average 1.1343457943925233) internal successors, (971), 870 states have internal predecessors, (971), 287 states have call successors, (287), 160 states have call predecessors, (287), 159 states have return successors, (283), 272 states have call predecessors, (283), 283 states have call successors, (283) [2021-05-06 08:15:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 1541 transitions. [2021-05-06 08:15:25,125 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 1541 transitions. Word has length 170 [2021-05-06 08:15:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:25,125 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 1541 transitions. [2021-05-06 08:15:25,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:15:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 1541 transitions. [2021-05-06 08:15:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-06 08:15:25,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:25,127 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:25,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:25,341 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash 398880833, now seen corresponding path program 11 times [2021-05-06 08:15:25,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:25,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707298604] [2021-05-06 08:15:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:25,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:25,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333176688] [2021-05-06 08:15:25,346 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 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 08:15:25,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:15:25,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:25,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-06 08:15:25,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:25,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:25,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,454 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-06 08:15:26,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-05-06 08:15:26,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:26,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707298604] [2021-05-06 08:15:26,657 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:26,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333176688] [2021-05-06 08:15:26,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333176688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:26,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:26,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:15:26,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702409496] [2021-05-06 08:15:26,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:15:26,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:26,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:15:26,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:15:26,658 INFO L87 Difference]: Start difference. First operand 1303 states and 1541 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2021-05-06 08:15:27,426 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-06 08:15:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:28,492 INFO L93 Difference]: Finished difference Result 1357 states and 1608 transitions. [2021-05-06 08:15:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:15:28,493 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 173 [2021-05-06 08:15:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:28,496 INFO L225 Difference]: With dead ends: 1357 [2021-05-06 08:15:28,496 INFO L226 Difference]: Without dead ends: 1357 [2021-05-06 08:15:28,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1145.7ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:15:28,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-05-06 08:15:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1291. [2021-05-06 08:15:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 849 states have (on average 1.1330977620730271) internal successors, (962), 864 states have internal predecessors, (962), 284 states have call successors, (284), 158 states have call predecessors, (284), 157 states have return successors, (280), 268 states have call predecessors, (280), 280 states have call successors, (280) [2021-05-06 08:15:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1526 transitions. [2021-05-06 08:15:28,509 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1526 transitions. Word has length 173 [2021-05-06 08:15:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:28,510 INFO L480 AbstractCegarLoop]: Abstraction has 1291 states and 1526 transitions. [2021-05-06 08:15:28,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2021-05-06 08:15:28,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1526 transitions. [2021-05-06 08:15:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-06 08:15:28,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:28,511 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:28,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:28,718 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:28,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:28,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1303020634, now seen corresponding path program 12 times [2021-05-06 08:15:28,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:28,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246606731] [2021-05-06 08:15:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:28,722 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:28,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255822385] [2021-05-06 08:15:28,723 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 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 08:15:29,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:15:29,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:29,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:15:29,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:29,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,039 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-06 08:15:30,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 132 proven. 69 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2021-05-06 08:15:30,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:30,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246606731] [2021-05-06 08:15:30,081 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:30,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255822385] [2021-05-06 08:15:30,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255822385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:30,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:30,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:15:30,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628681457] [2021-05-06 08:15:30,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:15:30,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:15:30,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:15:30,083 INFO L87 Difference]: Start difference. First operand 1291 states and 1526 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-06 08:15:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:30,821 INFO L93 Difference]: Finished difference Result 1406 states and 1682 transitions. [2021-05-06 08:15:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:15:30,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 174 [2021-05-06 08:15:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:30,825 INFO L225 Difference]: With dead ends: 1406 [2021-05-06 08:15:30,825 INFO L226 Difference]: Without dead ends: 1406 [2021-05-06 08:15:30,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:15:30,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2021-05-06 08:15:30,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1350. [2021-05-06 08:15:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 888 states have (on average 1.1373873873873874) internal successors, (1010), 904 states have internal predecessors, (1010), 301 states have call successors, (301), 161 states have call predecessors, (301), 160 states have return successors, (297), 284 states have call predecessors, (297), 297 states have call successors, (297) [2021-05-06 08:15:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1608 transitions. [2021-05-06 08:15:30,838 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1608 transitions. Word has length 174 [2021-05-06 08:15:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:30,839 INFO L480 AbstractCegarLoop]: Abstraction has 1350 states and 1608 transitions. [2021-05-06 08:15:30,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-06 08:15:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1608 transitions. [2021-05-06 08:15:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-06 08:15:30,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:30,840 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:31,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-06 08:15:31,047 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:31,047 INFO L82 PathProgramCache]: Analyzing trace with hash 337831166, now seen corresponding path program 13 times [2021-05-06 08:15:31,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:31,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922300561] [2021-05-06 08:15:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:31,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:31,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235992117] [2021-05-06 08:15:31,051 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 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 08:15:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:31,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:15:31,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:32,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 211 proven. 125 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2021-05-06 08:15:32,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:32,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922300561] [2021-05-06 08:15:32,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:32,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235992117] [2021-05-06 08:15:32,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235992117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:32,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:32,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:15:32,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139892085] [2021-05-06 08:15:32,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:15:32,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:32,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:15:32,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:15:32,657 INFO L87 Difference]: Start difference. First operand 1350 states and 1608 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2021-05-06 08:15:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:33,866 INFO L93 Difference]: Finished difference Result 1424 states and 1695 transitions. [2021-05-06 08:15:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:15:33,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 174 [2021-05-06 08:15:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:33,870 INFO L225 Difference]: With dead ends: 1424 [2021-05-06 08:15:33,870 INFO L226 Difference]: Without dead ends: 1424 [2021-05-06 08:15:33,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 821.6ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:15:33,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-05-06 08:15:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1381. [2021-05-06 08:15:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 906 states have (on average 1.1390728476821192) internal successors, (1032), 923 states have internal predecessors, (1032), 310 states have call successors, (310), 165 states have call predecessors, (310), 164 states have return successors, (306), 292 states have call predecessors, (306), 306 states have call successors, (306) [2021-05-06 08:15:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 1648 transitions. [2021-05-06 08:15:33,884 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 1648 transitions. Word has length 174 [2021-05-06 08:15:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:33,884 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 1648 transitions. [2021-05-06 08:15:33,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2021-05-06 08:15:33,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 1648 transitions. [2021-05-06 08:15:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-06 08:15:33,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:33,886 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:34,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:34,089 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:34,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:34,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1567893592, now seen corresponding path program 14 times [2021-05-06 08:15:34,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:34,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301927195] [2021-05-06 08:15:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:34,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:34,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386725377] [2021-05-06 08:15:34,094 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 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 08:15:34,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:34,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:34,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 128 conjunts are in the unsatisfiable core [2021-05-06 08:15:34,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:34,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 277 proven. 268 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2021-05-06 08:15:35,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:35,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301927195] [2021-05-06 08:15:35,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:35,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386725377] [2021-05-06 08:15:35,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386725377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:35,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:35,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:15:35,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060713687] [2021-05-06 08:15:35,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:15:35,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:15:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:15:35,217 INFO L87 Difference]: Start difference. First operand 1381 states and 1648 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:15:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:36,365 INFO L93 Difference]: Finished difference Result 1429 states and 1699 transitions. [2021-05-06 08:15:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:15:36,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 178 [2021-05-06 08:15:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:36,369 INFO L225 Difference]: With dead ends: 1429 [2021-05-06 08:15:36,369 INFO L226 Difference]: Without dead ends: 1429 [2021-05-06 08:15:36,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 892.0ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:15:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2021-05-06 08:15:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1358. [2021-05-06 08:15:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 894 states have (on average 1.1353467561521253) internal successors, (1015), 911 states have internal predecessors, (1015), 300 states have call successors, (300), 164 states have call predecessors, (300), 163 states have return successors, (296), 282 states have call predecessors, (296), 296 states have call successors, (296) [2021-05-06 08:15:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1611 transitions. [2021-05-06 08:15:36,392 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1611 transitions. Word has length 178 [2021-05-06 08:15:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:36,392 INFO L480 AbstractCegarLoop]: Abstraction has 1358 states and 1611 transitions. [2021-05-06 08:15:36,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:15:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1611 transitions. [2021-05-06 08:15:36,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 08:15:36,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:36,394 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:36,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-06 08:15:36,605 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:36,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1887563811, now seen corresponding path program 9 times [2021-05-06 08:15:36,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:36,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648521503] [2021-05-06 08:15:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:36,610 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:36,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784027867] [2021-05-06 08:15:36,610 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 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 08:15:37,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:15:37,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:37,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 08:15:37,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:37,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 119 proven. 71 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2021-05-06 08:15:37,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:37,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648521503] [2021-05-06 08:15:37,584 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:37,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784027867] [2021-05-06 08:15:37,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784027867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:37,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:37,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:15:37,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380249152] [2021-05-06 08:15:37,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:15:37,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:37,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:15:37,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:15:37,585 INFO L87 Difference]: Start difference. First operand 1358 states and 1611 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:15:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:38,215 INFO L93 Difference]: Finished difference Result 1431 states and 1701 transitions. [2021-05-06 08:15:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:15:38,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 180 [2021-05-06 08:15:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:38,219 INFO L225 Difference]: With dead ends: 1431 [2021-05-06 08:15:38,219 INFO L226 Difference]: Without dead ends: 1425 [2021-05-06 08:15:38,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:15:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-05-06 08:15:38,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1351. [2021-05-06 08:15:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 890 states have (on average 1.1337078651685393) internal successors, (1009), 904 states have internal predecessors, (1009), 295 states have call successors, (295), 166 states have call predecessors, (295), 165 states have return successors, (291), 280 states have call predecessors, (291), 291 states have call successors, (291) [2021-05-06 08:15:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1595 transitions. [2021-05-06 08:15:38,232 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1595 transitions. Word has length 180 [2021-05-06 08:15:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:38,232 INFO L480 AbstractCegarLoop]: Abstraction has 1351 states and 1595 transitions. [2021-05-06 08:15:38,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:15:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1595 transitions. [2021-05-06 08:15:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 08:15:38,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:38,234 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:38,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-06 08:15:38,441 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:38,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:38,441 INFO L82 PathProgramCache]: Analyzing trace with hash -710122111, now seen corresponding path program 10 times [2021-05-06 08:15:38,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:38,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357995229] [2021-05-06 08:15:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:38,445 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:38,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206635486] [2021-05-06 08:15:38,446 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 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 08:15:38,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:15:38,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-06 08:15:38,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:39,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 294 proven. 193 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-05-06 08:15:39,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:39,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357995229] [2021-05-06 08:15:39,186 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:39,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206635486] [2021-05-06 08:15:39,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206635486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:39,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:39,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:15:39,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468759404] [2021-05-06 08:15:39,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:15:39,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:39,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:15:39,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:15:39,187 INFO L87 Difference]: Start difference. First operand 1351 states and 1595 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2021-05-06 08:15:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:41,057 INFO L93 Difference]: Finished difference Result 1438 states and 1703 transitions. [2021-05-06 08:15:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:15:41,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 180 [2021-05-06 08:15:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:41,060 INFO L225 Difference]: With dead ends: 1438 [2021-05-06 08:15:41,060 INFO L226 Difference]: Without dead ends: 1433 [2021-05-06 08:15:41,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 489.2ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:15:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-05-06 08:15:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1387. [2021-05-06 08:15:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 911 states have (on average 1.1361141602634468) internal successors, (1035), 926 states have internal predecessors, (1035), 308 states have call successors, (308), 168 states have call predecessors, (308), 167 states have return successors, (304), 292 states have call predecessors, (304), 304 states have call successors, (304) [2021-05-06 08:15:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1647 transitions. [2021-05-06 08:15:41,091 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1647 transitions. Word has length 180 [2021-05-06 08:15:41,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:41,091 INFO L480 AbstractCegarLoop]: Abstraction has 1387 states and 1647 transitions. [2021-05-06 08:15:41,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2021-05-06 08:15:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1647 transitions. [2021-05-06 08:15:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 08:15:41,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:41,109 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:41,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:41,326 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:41,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:41,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2092734557, now seen corresponding path program 11 times [2021-05-06 08:15:41,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:41,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119905743] [2021-05-06 08:15:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:41,331 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:41,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191199327] [2021-05-06 08:15:41,331 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 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 08:15:41,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:15:41,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:41,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:15:41,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:41,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 180 proven. 307 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-05-06 08:15:42,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:42,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119905743] [2021-05-06 08:15:42,312 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:42,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191199327] [2021-05-06 08:15:42,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191199327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:42,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:42,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:15:42,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006984175] [2021-05-06 08:15:42,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:15:42,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:42,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:15:42,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:15:42,313 INFO L87 Difference]: Start difference. First operand 1387 states and 1647 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) [2021-05-06 08:15:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:43,557 INFO L93 Difference]: Finished difference Result 1412 states and 1683 transitions. [2021-05-06 08:15:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:15:43,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) Word has length 180 [2021-05-06 08:15:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:43,557 INFO L225 Difference]: With dead ends: 1412 [2021-05-06 08:15:43,558 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:15:43,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:15:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:15:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:15:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:15:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:15:43,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 180 [2021-05-06 08:15:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:43,558 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:15:43,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) [2021-05-06 08:15:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:15:43,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:15:43,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-06 08:15:43,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:15:43 BasicIcfg [2021-05-06 08:15:43,762 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:15:43,763 INFO L168 Benchmark]: Toolchain (without parser) took 82973.05 ms. Allocated memory was 204.5 MB in the beginning and 425.7 MB in the end (delta: 221.2 MB). Free memory was 170.0 MB in the beginning and 380.0 MB in the end (delta: -210.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:43,763 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 204.5 MB. Free memory is still 186.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:15:43,763 INFO L168 Benchmark]: CACSL2BoogieTranslator took 136.69 ms. Allocated memory is still 204.5 MB. Free memory was 169.9 MB in the beginning and 159.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:43,763 INFO L168 Benchmark]: Boogie Preprocessor took 53.91 ms. Allocated memory is still 204.5 MB. Free memory was 159.6 MB in the beginning and 188.1 MB in the end (delta: -28.5 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:43,763 INFO L168 Benchmark]: RCFGBuilder took 276.56 ms. Allocated memory is still 204.5 MB. Free memory was 187.6 MB in the beginning and 170.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:43,763 INFO L168 Benchmark]: IcfgTransformer took 13.18 ms. Allocated memory is still 204.5 MB. Free memory was 170.8 MB in the beginning and 169.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:43,763 INFO L168 Benchmark]: TraceAbstraction took 82487.07 ms. Allocated memory was 204.5 MB in the beginning and 425.7 MB in the end (delta: 221.2 MB). Free memory was 168.7 MB in the beginning and 380.0 MB in the end (delta: -211.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:43,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 204.5 MB. Free memory is still 186.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 136.69 ms. Allocated memory is still 204.5 MB. Free memory was 169.9 MB in the beginning and 159.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.91 ms. Allocated memory is still 204.5 MB. Free memory was 159.6 MB in the beginning and 188.1 MB in the end (delta: -28.5 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 276.56 ms. Allocated memory is still 204.5 MB. Free memory was 187.6 MB in the beginning and 170.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.18 ms. Allocated memory is still 204.5 MB. Free memory was 170.8 MB in the beginning and 169.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 82487.07 ms. Allocated memory was 204.5 MB in the beginning and 425.7 MB in the end (delta: 221.2 MB). Free memory was 168.7 MB in the beginning and 380.0 MB in the end (delta: -211.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 82436.7ms, OverallIterations: 56, TraceHistogramMax: 25, EmptinessCheckTime: 74.9ms, AutomataDifference: 37469.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3228 SDtfs, 2473 SDslu, 18876 SDs, 0 SdLazy, 18121 SolverSat, 2220 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 26769.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6470 GetRequests, 5658 SyntacticMatches, 35 SemanticMatches, 777 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 21751.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1387occurred in iteration=55, InterpolantAutomatonStates: 696, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 546.4ms AutomataMinimizationTime, 56 MinimizatonAttempts, 899 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 572.7ms SsaConstructionTime, 6155.1ms SatisfiabilityAnalysisTime, 23795.7ms InterpolantComputationTime, 6263 NumberOfCodeBlocks, 5652 NumberOfCodeBlocksAsserted, 147 NumberOfCheckSat, 6207 ConstructedInterpolants, 0 QuantifiedInterpolants, 43153 SizeOfPredicates, 452 NumberOfNonLiveVariables, 17581 ConjunctsInSsa, 2069 ConjunctsInUnsatCore, 56 InterpolantComputations, 4 PerfectInterpolantSequences, 20389/27799 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...