/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/fermat2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:26:40,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:26:40,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:26:40,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:26:40,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:26:40,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:26:40,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:26:40,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:26:40,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:26:40,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:26:40,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:26:40,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:26:40,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:26:40,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:26:40,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:26:40,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:26:40,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:26:40,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:26:40,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:26:40,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:26:40,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:26:40,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:26:40,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:26:40,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:26:40,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:26:40,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:26:40,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:26:40,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:26:40,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:26:40,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:26:40,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:26:40,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:26:40,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:26:40,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:26:40,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:26:40,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:26:40,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:26:40,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:26:40,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:26:40,468 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:26:40,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:26:40,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:26:40,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:26:40,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:26:40,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:26:40,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:26:40,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:26:40,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:26:40,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:26:40,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:26:40,471 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:26:40,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:26:40,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:26:40,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:26:40,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:26:40,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:26:40,727 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:26:40,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2021-05-06 08:26:40,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/397cdf09d/5c4efe9b08674557837e4c8dfec412d0/FLAG49b574bda [2021-05-06 08:26:41,108 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:26:41,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2021-05-06 08:26:41,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/397cdf09d/5c4efe9b08674557837e4c8dfec412d0/FLAG49b574bda [2021-05-06 08:26:41,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/397cdf09d/5c4efe9b08674557837e4c8dfec412d0 [2021-05-06 08:26:41,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:26:41,538 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:26:41,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:26:41,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:26:41,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:26:41,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:26:41" (1/1) ... [2021-05-06 08:26:41,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa72006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41, skipping insertion in model container [2021-05-06 08:26:41,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:26:41" (1/1) ... [2021-05-06 08:26:41,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:26:41,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:26:41,631 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/fermat2-ll_unwindbound50.c[524,537] [2021-05-06 08:26:41,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:26:41,650 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:26:41,660 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/fermat2-ll_unwindbound50.c[524,537] [2021-05-06 08:26:41,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:26:41,684 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:26:41,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41 WrapperNode [2021-05-06 08:26:41,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:26:41,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:26:41,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:26:41,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:26:41,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41" (1/1) ... [2021-05-06 08:26:41,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41" (1/1) ... [2021-05-06 08:26:41,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41" (1/1) ... [2021-05-06 08:26:41,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41" (1/1) ... [2021-05-06 08:26:41,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41" (1/1) ... [2021-05-06 08:26:41,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41" (1/1) ... [2021-05-06 08:26:41,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41" (1/1) ... [2021-05-06 08:26:41,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:26:41,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:26:41,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:26:41,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:26:41,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:26:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:26:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:26:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:26:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:26:41,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:26:41,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:26:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:26:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:26:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:26:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:26:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:26:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:26:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:26:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:26:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:26:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:26:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:26:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:26:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:26:41,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:26:42,082 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:26:42,083 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:26:42,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:26:42 BoogieIcfgContainer [2021-05-06 08:26:42,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:26:42,084 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:26:42,084 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:26:42,085 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:26:42,087 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:26:42" (1/1) ... [2021-05-06 08:26:42,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:26:42 BasicIcfg [2021-05-06 08:26:42,113 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:26:42,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:26:42,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:26:42,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:26:42,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:26:41" (1/4) ... [2021-05-06 08:26:42,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52eba645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:26:42, skipping insertion in model container [2021-05-06 08:26:42,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:41" (2/4) ... [2021-05-06 08:26:42,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52eba645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:26:42, skipping insertion in model container [2021-05-06 08:26:42,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:26:42" (3/4) ... [2021-05-06 08:26:42,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52eba645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:26:42, skipping insertion in model container [2021-05-06 08:26:42,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:26:42" (4/4) ... [2021-05-06 08:26:42,117 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound50.cJordan [2021-05-06 08:26:42,125 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:26:42,129 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:26:42,140 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:26:42,162 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:26:42,162 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:26:42,162 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:26:42,162 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:26:42,162 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:26:42,162 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:26:42,162 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:26:42,162 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:26:42,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:26:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:26:42,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:42,182 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:42,183 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-06 08:26:42,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:42,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571063675] [2021-05-06 08:26:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:42,284 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:42,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515237532] [2021-05-06 08:26:42,285 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 08:26:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:42,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:26:42,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 08:26:42,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:42,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571063675] [2021-05-06 08:26:42,468 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:42,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515237532] [2021-05-06 08:26:42,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515237532] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:26:42,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:26:42,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:26:42,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4492075] [2021-05-06 08:26:42,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:26:42,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:42,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:26:42,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:26:42,485 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:26:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:42,497 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-06 08:26:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:26:42,498 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:26:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:42,503 INFO L225 Difference]: With dead ends: 30 [2021-05-06 08:26:42,503 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:26:42,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 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 08:26:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:26:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:26:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:26:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 08:26:42,528 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 08:26:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:42,528 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 08:26:42,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:26:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 08:26:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:26:42,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:42,530 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:42,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:26:42,748 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:42,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-06 08:26:42,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:42,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368020050] [2021-05-06 08:26:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:42,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:42,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635172001] [2021-05-06 08:26:42,766 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 08:26:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:42,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:26:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:42,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:42,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:42,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:42,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:42,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:42,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:42,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368020050] [2021-05-06 08:26:42,941 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:42,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635172001] [2021-05-06 08:26:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635172001] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:26:42,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:26:42,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:26:42,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321211939] [2021-05-06 08:26:42,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:26:42,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:42,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:26:42,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:26:42,943 INFO L87 Difference]: Start difference. First operand 25 states and 29 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:26:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:42,953 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-06 08:26:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:26:42,954 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:26:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:42,954 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:26:42,954 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:26:42,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:26:42,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:26:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:26:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:26:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 08:26:42,958 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 08:26:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:42,959 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 08:26:42,959 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:26:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 08:26:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:26:42,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:42,960 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:43,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:43,177 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-06 08:26:43,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:43,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758218399] [2021-05-06 08:26:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:43,191 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:43,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747476915] [2021-05-06 08:26:43,192 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 08:26:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:26:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:43,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:43,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:43,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:43,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:43,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758218399] [2021-05-06 08:26:43,341 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:43,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747476915] [2021-05-06 08:26:43,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747476915] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:26:43,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:26:43,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:26:43,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418486238] [2021-05-06 08:26:43,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:26:43,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:43,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:26:43,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:26:43,343 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:26:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:45,674 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-06 08:26:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:26:45,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:26:45,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:45,675 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:26:45,675 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 08:26:45,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:26:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 08:26:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-05-06 08:26:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:26:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-06 08:26:45,680 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2021-05-06 08:26:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:45,680 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-06 08:26:45,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:26:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-06 08:26:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:26:45,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:45,681 INFO L523 BasicCegarLoop]: trace histogram [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 08:26:45,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:45,898 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:45,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:45,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-06 08:26:45,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:45,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110586890] [2021-05-06 08:26:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:45,908 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:45,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278815311] [2021-05-06 08:26:45,909 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 08:26:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:45,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:26:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:46,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:46,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:46,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110586890] [2021-05-06 08:26:46,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:46,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278815311] [2021-05-06 08:26:46,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278815311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:46,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:46,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:26:46,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806968508] [2021-05-06 08:26:46,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:26:46,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:46,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:26:46,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:26:46,065 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:26:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:46,137 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-05-06 08:26:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:26:46,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 08:26:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:46,138 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:26:46,138 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:26:46,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:26:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:26:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-05-06 08:26:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:26:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 08:26:46,142 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 08:26:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:46,143 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 08:26:46,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:26:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 08:26:46,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 08:26:46,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:46,144 INFO L523 BasicCegarLoop]: trace histogram [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 08:26:46,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:46,361 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:46,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-06 08:26:46,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:46,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852524265] [2021-05-06 08:26:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:46,371 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:46,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264421262] [2021-05-06 08:26:46,372 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 08:26:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:46,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:26:46,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:46,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:46,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:46,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852524265] [2021-05-06 08:26:46,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:46,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264421262] [2021-05-06 08:26:46,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264421262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:46,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:46,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:26:46,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725577544] [2021-05-06 08:26:46,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:26:46,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:46,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:26:46,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:26:46,483 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:26:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:46,508 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-06 08:26:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:26:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 08:26:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:46,509 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:26:46,509 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:26:46,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:26:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:26:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:26:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:26:46,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 08:26:46,512 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-06 08:26:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:46,513 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 08:26:46,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:26:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 08:26:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:26:46,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:46,514 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 08:26:46,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:46,730 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:46,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-06 08:26:46,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:46,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926181334] [2021-05-06 08:26:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:46,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:46,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769284808] [2021-05-06 08:26:46,739 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 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 08:26:46,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:26:46,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:26:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:46,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:46,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:46,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926181334] [2021-05-06 08:26:46,892 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:46,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769284808] [2021-05-06 08:26:46,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769284808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:46,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:46,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:26:46,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349596868] [2021-05-06 08:26:46,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:26:46,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:46,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:26:46,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:26:46,894 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:26:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:46,932 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 08:26:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:26:46,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 08:26:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:46,934 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:26:46,934 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:26:46,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:26:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:26:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 08:26:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:26:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-06 08:26:46,937 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-06 08:26:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:46,938 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-06 08:26:46,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:26:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-06 08:26:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:26:46,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:46,939 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-05-06 08:26:47,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:47,155 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash 489214531, now seen corresponding path program 3 times [2021-05-06 08:26:47,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:47,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763130673] [2021-05-06 08:26:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:47,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:47,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136403802] [2021-05-06 08:26:47,163 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 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 08:26:47,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:26:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:26:47,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:47,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:47,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:47,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763130673] [2021-05-06 08:26:47,389 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:47,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136403802] [2021-05-06 08:26:47,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136403802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:47,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:47,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:26:47,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972293245] [2021-05-06 08:26:47,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:26:47,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:47,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:26:47,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:26:47,390 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:26:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:47,439 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-05-06 08:26:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:26:47,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-06 08:26:47,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:47,440 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:26:47,440 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:26:47,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:26:47,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:26:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:26:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:26:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-06 08:26:47,444 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-06 08:26:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:47,444 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-06 08:26:47,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:26:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-06 08:26:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:26:47,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:47,445 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:47,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:47,663 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:47,663 INFO L82 PathProgramCache]: Analyzing trace with hash -906969448, now seen corresponding path program 4 times [2021-05-06 08:26:47,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:47,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787082715] [2021-05-06 08:26:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:47,671 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:47,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28119236] [2021-05-06 08:26:47,671 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 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 08:26:47,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:26:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:47,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:26:47,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:47,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:47,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:47,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787082715] [2021-05-06 08:26:47,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:47,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28119236] [2021-05-06 08:26:47,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28119236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:47,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:47,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:26:47,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175214169] [2021-05-06 08:26:47,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:26:47,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:47,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:26:47,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:26:47,870 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:26:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:47,927 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-05-06 08:26:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:26:47,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 08:26:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:47,928 INFO L225 Difference]: With dead ends: 65 [2021-05-06 08:26:47,928 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:26:47,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:26:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:26:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:26:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:26:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-06 08:26:47,932 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-06 08:26:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:47,932 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-06 08:26:47,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:26:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-06 08:26:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:26:47,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:47,933 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:48,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:26:48,151 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:48,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1572135395, now seen corresponding path program 5 times [2021-05-06 08:26:48,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:48,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73132334] [2021-05-06 08:26:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:48,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:48,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637421040] [2021-05-06 08:26:48,158 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 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 08:26:48,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:26:48,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:48,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:26:48,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:48,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:48,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:48,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73132334] [2021-05-06 08:26:48,357 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:48,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637421040] [2021-05-06 08:26:48,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637421040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:48,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:48,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:26:48,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313194305] [2021-05-06 08:26:48,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:26:48,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:48,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:26:48,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:26:48,358 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:26:48,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:48,428 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-05-06 08:26:48,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:26:48,428 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-05-06 08:26:48,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:48,429 INFO L225 Difference]: With dead ends: 74 [2021-05-06 08:26:48,429 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 08:26:48,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:26:48,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 08:26:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 08:26:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:26:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-05-06 08:26:48,435 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2021-05-06 08:26:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:48,435 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-05-06 08:26:48,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:26:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-05-06 08:26:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:26:48,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:48,436 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:48,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:48,653 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:48,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:48,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1651262200, now seen corresponding path program 6 times [2021-05-06 08:26:48,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:48,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395759890] [2021-05-06 08:26:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:48,660 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:48,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225274397] [2021-05-06 08:26:48,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:26:48,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:26:48,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:48,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:26:48,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:48,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:48,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:49,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:49,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395759890] [2021-05-06 08:26:49,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:49,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225274397] [2021-05-06 08:26:49,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225274397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:49,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:49,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:26:49,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984330483] [2021-05-06 08:26:49,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:26:49,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:49,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:26:49,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:26:49,009 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:26:49,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:49,089 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-05-06 08:26:49,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:26:49,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-05-06 08:26:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:49,090 INFO L225 Difference]: With dead ends: 83 [2021-05-06 08:26:49,090 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 08:26:49,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:26:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 08:26:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 08:26:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:26:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-06 08:26:49,094 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2021-05-06 08:26:49,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:49,094 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-06 08:26:49,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:26:49,095 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-06 08:26:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:26:49,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:49,096 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:49,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:49,315 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:49,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1720170109, now seen corresponding path program 7 times [2021-05-06 08:26:49,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:49,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580089777] [2021-05-06 08:26:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:49,321 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:49,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557421319] [2021-05-06 08:26:49,322 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 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 08:26:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:49,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:26:49,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:49,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:49,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:49,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580089777] [2021-05-06 08:26:49,548 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:49,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557421319] [2021-05-06 08:26:49,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557421319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:49,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:49,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:26:49,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70700541] [2021-05-06 08:26:49,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:26:49,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:26:49,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:26:49,549 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:26:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:49,639 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-05-06 08:26:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:26:49,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2021-05-06 08:26:49,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:49,640 INFO L225 Difference]: With dead ends: 92 [2021-05-06 08:26:49,640 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 08:26:49,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:26:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 08:26:49,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 08:26:49,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:26:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 08:26:49,644 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2021-05-06 08:26:49,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:49,645 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 08:26:49,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:26:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 08:26:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 08:26:49,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:49,646 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:49,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:26:49,863 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:49,863 INFO L82 PathProgramCache]: Analyzing trace with hash -327979176, now seen corresponding path program 8 times [2021-05-06 08:26:49,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:49,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440668851] [2021-05-06 08:26:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:49,869 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:49,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169479983] [2021-05-06 08:26:49,870 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 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 08:26:49,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:26:49,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:49,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:26:49,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:49,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:49,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:50,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:50,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440668851] [2021-05-06 08:26:50,102 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:50,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169479983] [2021-05-06 08:26:50,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169479983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:50,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:50,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:26:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555570887] [2021-05-06 08:26:50,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:26:50,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:50,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:26:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:26:50,103 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:26:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:50,203 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-05-06 08:26:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:26:50,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2021-05-06 08:26:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:50,205 INFO L225 Difference]: With dead ends: 101 [2021-05-06 08:26:50,205 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 08:26:50,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:26:50,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 08:26:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 08:26:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:26:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 08:26:50,208 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2021-05-06 08:26:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:50,209 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 08:26:50,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:26:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 08:26:50,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:26:50,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:50,210 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:50,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:50,427 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1572009693, now seen corresponding path program 9 times [2021-05-06 08:26:50,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:50,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543423225] [2021-05-06 08:26:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:50,434 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:50,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896000848] [2021-05-06 08:26:50,434 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 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 08:27:30,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 08:27:30,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:27:30,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:30,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:31,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:31,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543423225] [2021-05-06 08:27:31,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:31,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896000848] [2021-05-06 08:27:31,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896000848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:31,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:31,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:27:31,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96062768] [2021-05-06 08:27:31,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:27:31,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:31,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:27:31,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:27:31,249 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:27:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:31,358 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-05-06 08:27:31,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 08:27:31,359 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2021-05-06 08:27:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:31,360 INFO L225 Difference]: With dead ends: 110 [2021-05-06 08:27:31,360 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 08:27:31,360 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:27:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 08:27:31,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-06 08:27:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:27:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-06 08:27:31,371 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2021-05-06 08:27:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:31,372 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-06 08:27:31,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:27:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-06 08:27:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:27:31,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:31,377 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:31,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:27:31,594 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:31,594 INFO L82 PathProgramCache]: Analyzing trace with hash 191644600, now seen corresponding path program 10 times [2021-05-06 08:27:31,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:31,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852526178] [2021-05-06 08:27:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:31,605 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:31,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390143698] [2021-05-06 08:27:31,606 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 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 08:27:31,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:27:31,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:31,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:27:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:31,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:31,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:31,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852526178] [2021-05-06 08:27:31,961 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:31,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390143698] [2021-05-06 08:27:31,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390143698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:31,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:31,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:27:31,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226597582] [2021-05-06 08:27:31,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:27:31,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:31,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:27:31,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:27:31,962 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 08:27:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:32,104 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-05-06 08:27:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 08:27:32,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2021-05-06 08:27:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:32,107 INFO L225 Difference]: With dead ends: 119 [2021-05-06 08:27:32,107 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 08:27:32,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:27:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 08:27:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 08:27:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:27:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-06 08:27:32,111 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2021-05-06 08:27:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:32,112 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-06 08:27:32,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 08:27:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-06 08:27:32,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 08:27:32,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:32,113 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:32,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:32,332 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:32,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1200431299, now seen corresponding path program 11 times [2021-05-06 08:27:32,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:32,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377367385] [2021-05-06 08:27:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:32,343 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:32,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751324391] [2021-05-06 08:27:32,343 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 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 08:27:32,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 08:27:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:32,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 08:27:32,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:32,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:32,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:32,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377367385] [2021-05-06 08:27:32,658 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:32,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751324391] [2021-05-06 08:27:32,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751324391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:32,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:32,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:27:32,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374352065] [2021-05-06 08:27:32,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:27:32,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:27:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:27:32,660 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 08:27:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:32,844 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-05-06 08:27:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 08:27:32,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2021-05-06 08:27:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:32,845 INFO L225 Difference]: With dead ends: 128 [2021-05-06 08:27:32,845 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 08:27:32,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:27:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 08:27:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-06 08:27:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:27:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-05-06 08:27:32,852 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2021-05-06 08:27:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:32,852 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-05-06 08:27:32,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 08:27:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-05-06 08:27:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 08:27:32,854 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:32,854 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:33,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:27:33,057 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:33,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:33,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1791180776, now seen corresponding path program 12 times [2021-05-06 08:27:33,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:33,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112811057] [2021-05-06 08:27:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:33,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:33,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817929041] [2021-05-06 08:27:33,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:27:33,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 08:27:33,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:33,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:27:33,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:33,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:33,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:33,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112811057] [2021-05-06 08:27:33,674 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:33,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817929041] [2021-05-06 08:27:33,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817929041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:33,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:33,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:27:33,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271817139] [2021-05-06 08:27:33,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:27:33,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:33,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:27:33,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:27:33,676 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 08:27:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:33,845 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2021-05-06 08:27:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 08:27:33,845 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2021-05-06 08:27:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:33,846 INFO L225 Difference]: With dead ends: 137 [2021-05-06 08:27:33,846 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 08:27:33,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:27:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 08:27:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 08:27:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:27:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-05-06 08:27:33,851 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2021-05-06 08:27:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:33,852 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-05-06 08:27:33,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 08:27:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-05-06 08:27:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 08:27:33,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:33,853 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:34,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:27:34,058 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:34,058 INFO L82 PathProgramCache]: Analyzing trace with hash -166555549, now seen corresponding path program 13 times [2021-05-06 08:27:34,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:34,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354159786] [2021-05-06 08:27:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:34,064 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:34,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961043401] [2021-05-06 08:27:34,064 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 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 08:27:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:34,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 08:27:34,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:34,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:34,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:34,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354159786] [2021-05-06 08:27:34,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:34,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961043401] [2021-05-06 08:27:34,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961043401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:34,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:34,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:27:34,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220698059] [2021-05-06 08:27:34,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:27:34,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:34,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:27:34,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:27:34,415 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 08:27:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:34,606 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2021-05-06 08:27:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 08:27:34,606 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2021-05-06 08:27:34,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:34,607 INFO L225 Difference]: With dead ends: 146 [2021-05-06 08:27:34,607 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 08:27:34,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-06 08:27:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 08:27:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-06 08:27:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:27:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2021-05-06 08:27:34,610 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2021-05-06 08:27:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:34,611 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2021-05-06 08:27:34,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 08:27:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2021-05-06 08:27:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:27:34,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:34,612 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:34,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:27:34,815 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash -229972872, now seen corresponding path program 14 times [2021-05-06 08:27:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:34,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389155404] [2021-05-06 08:27:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:34,823 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:34,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016217787] [2021-05-06 08:27:34,823 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 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 08:27:34,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:27:34,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:34,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 08:27:34,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:34,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:34,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:35,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:35,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389155404] [2021-05-06 08:27:35,233 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:35,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016217787] [2021-05-06 08:27:35,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016217787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:35,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:35,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:27:35,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774763926] [2021-05-06 08:27:35,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:27:35,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:35,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:27:35,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:27:35,234 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 08:27:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:35,446 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2021-05-06 08:27:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 08:27:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2021-05-06 08:27:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:35,448 INFO L225 Difference]: With dead ends: 155 [2021-05-06 08:27:35,449 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 08:27:35,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:27:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 08:27:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 08:27:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:27:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-05-06 08:27:35,452 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2021-05-06 08:27:35,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:35,453 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-05-06 08:27:35,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 08:27:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-05-06 08:27:35,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-06 08:27:35,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:35,454 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:35,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:27:35,671 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1480022019, now seen corresponding path program 15 times [2021-05-06 08:27:35,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:35,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951525408] [2021-05-06 08:27:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:35,679 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:35,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193677582] [2021-05-06 08:27:35,679 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 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 08:27:41,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 08:27:41,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:41,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:27:41,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:41,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:41,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951525408] [2021-05-06 08:27:41,809 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:41,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193677582] [2021-05-06 08:27:41,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193677582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:41,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:41,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:27:41,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145600654] [2021-05-06 08:27:41,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:27:41,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:41,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:27:41,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:27:41,811 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 08:27:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:42,043 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2021-05-06 08:27:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 08:27:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2021-05-06 08:27:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:42,044 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:27:42,044 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:27:42,044 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 08:27:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:27:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-06 08:27:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:27:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2021-05-06 08:27:42,048 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2021-05-06 08:27:42,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:42,048 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2021-05-06 08:27:42,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 08:27:42,048 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2021-05-06 08:27:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-06 08:27:42,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:42,049 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:42,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:42,259 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:42,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2105323736, now seen corresponding path program 16 times [2021-05-06 08:27:42,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:42,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829711216] [2021-05-06 08:27:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:42,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:42,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589588920] [2021-05-06 08:27:42,264 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 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 08:27:42,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:27:42,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:42,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 08:27:42,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:42,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:42,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:42,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829711216] [2021-05-06 08:27:42,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:42,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589588920] [2021-05-06 08:27:42,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589588920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:42,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:42,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:27:42,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143098213] [2021-05-06 08:27:42,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:27:42,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:42,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:27:42,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:27:42,827 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 08:27:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:43,103 INFO L93 Difference]: Finished difference Result 173 states and 191 transitions. [2021-05-06 08:27:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 08:27:43,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2021-05-06 08:27:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:43,104 INFO L225 Difference]: With dead ends: 173 [2021-05-06 08:27:43,104 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 08:27:43,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 08:27:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 08:27:43,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 08:27:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:27:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2021-05-06 08:27:43,108 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2021-05-06 08:27:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:43,108 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2021-05-06 08:27:43,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 08:27:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2021-05-06 08:27:43,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-06 08:27:43,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:43,109 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:43,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:43,314 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:43,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:43,314 INFO L82 PathProgramCache]: Analyzing trace with hash -170559581, now seen corresponding path program 17 times [2021-05-06 08:27:43,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:43,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206028143] [2021-05-06 08:27:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:43,319 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:43,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238581318] [2021-05-06 08:27:43,319 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 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 08:27:43,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-06 08:27:43,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:43,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 08:27:43,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:43,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:43,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:43,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206028143] [2021-05-06 08:27:43,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:43,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238581318] [2021-05-06 08:27:43,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238581318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:43,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:43,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 08:27:43,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788991204] [2021-05-06 08:27:43,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:27:43,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:43,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:27:43,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:27:43,766 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 08:27:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:44,048 INFO L93 Difference]: Finished difference Result 182 states and 201 transitions. [2021-05-06 08:27:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 08:27:44,048 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2021-05-06 08:27:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:44,049 INFO L225 Difference]: With dead ends: 182 [2021-05-06 08:27:44,049 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 08:27:44,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 08:27:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 08:27:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-06 08:27:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:27:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2021-05-06 08:27:44,053 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2021-05-06 08:27:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:44,053 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2021-05-06 08:27:44,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 08:27:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2021-05-06 08:27:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-06 08:27:44,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:44,054 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:44,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:27:44,272 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:44,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:44,272 INFO L82 PathProgramCache]: Analyzing trace with hash -466082504, now seen corresponding path program 18 times [2021-05-06 08:27:44,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:44,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450311358] [2021-05-06 08:27:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:44,280 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:44,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603670360] [2021-05-06 08:27:44,280 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 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 08:27:52,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 08:27:52,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 08:27:52,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:52,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:52,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450311358] [2021-05-06 08:27:52,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:52,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603670360] [2021-05-06 08:27:52,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603670360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:52,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:52,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 08:27:52,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794776875] [2021-05-06 08:27:52,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 08:27:52,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 08:27:52,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:27:52,734 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 08:27:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:53,022 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2021-05-06 08:27:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 08:27:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2021-05-06 08:27:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:53,023 INFO L225 Difference]: With dead ends: 191 [2021-05-06 08:27:53,023 INFO L226 Difference]: Without dead ends: 191 [2021-05-06 08:27:53,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 08:27:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-06 08:27:53,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-06 08:27:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 08:27:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-05-06 08:27:53,028 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2021-05-06 08:27:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:53,028 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-05-06 08:27:53,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 08:27:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-05-06 08:27:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-06 08:27:53,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:53,029 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:53,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:53,237 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:53,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:53,237 INFO L82 PathProgramCache]: Analyzing trace with hash -733548733, now seen corresponding path program 19 times [2021-05-06 08:27:53,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:53,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703274813] [2021-05-06 08:27:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:53,242 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:53,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353420] [2021-05-06 08:27:53,242 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 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 08:27:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:53,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 08:27:53,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:53,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:53,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:53,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703274813] [2021-05-06 08:27:53,769 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:53,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353420] [2021-05-06 08:27:53,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:53,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:53,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 08:27:53,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588414854] [2021-05-06 08:27:53,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 08:27:53,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:53,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 08:27:53,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:27:53,771 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 08:27:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:54,084 INFO L93 Difference]: Finished difference Result 200 states and 221 transitions. [2021-05-06 08:27:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 08:27:54,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2021-05-06 08:27:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:54,085 INFO L225 Difference]: With dead ends: 200 [2021-05-06 08:27:54,085 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 08:27:54,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 08:27:54,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 08:27:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-06 08:27:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:27:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2021-05-06 08:27:54,089 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2021-05-06 08:27:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:54,089 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2021-05-06 08:27:54,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 08:27:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2021-05-06 08:27:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-06 08:27:54,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:54,090 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:54,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:27:54,296 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:54,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2040315496, now seen corresponding path program 20 times [2021-05-06 08:27:54,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:54,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053890566] [2021-05-06 08:27:54,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:54,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:54,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766530148] [2021-05-06 08:27:54,312 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 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 08:27:54,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:27:54,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:54,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:27:54,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:54,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 1750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:27:54,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:54,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053890566] [2021-05-06 08:27:54,842 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:54,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766530148] [2021-05-06 08:27:54,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766530148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:27:54,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:27:54,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 08:27:54,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850978259] [2021-05-06 08:27:54,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 08:27:54,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:54,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 08:27:54,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:27:54,844 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2021-05-06 08:27:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:55,179 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2021-05-06 08:27:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 08:27:55,180 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 203 [2021-05-06 08:27:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:55,181 INFO L225 Difference]: With dead ends: 209 [2021-05-06 08:27:55,181 INFO L226 Difference]: Without dead ends: 209 [2021-05-06 08:27:55,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 08:27:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-06 08:27:55,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-05-06 08:27:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 159 states have internal predecessors, (181), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:27:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2021-05-06 08:27:55,185 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 203 [2021-05-06 08:27:55,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:55,185 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2021-05-06 08:27:55,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2021-05-06 08:27:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2021-05-06 08:27:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-06 08:27:55,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:55,186 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:55,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:27:55,401 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:55,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:55,401 INFO L82 PathProgramCache]: Analyzing trace with hash 375766755, now seen corresponding path program 21 times [2021-05-06 08:27:55,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:55,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002075596] [2021-05-06 08:27:55,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:55,406 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:55,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877806377] [2021-05-06 08:27:55,406 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 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 08:27:59,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-06 08:27:59,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:27:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 08:27:59,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:59,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1932 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:00,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:00,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002075596] [2021-05-06 08:28:00,250 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:00,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877806377] [2021-05-06 08:28:00,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877806377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:00,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:00,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-06 08:28:00,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058796165] [2021-05-06 08:28:00,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 08:28:00,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:00,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 08:28:00,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:28:00,252 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2021-05-06 08:28:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:00,594 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2021-05-06 08:28:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 08:28:00,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 212 [2021-05-06 08:28:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:00,595 INFO L225 Difference]: With dead ends: 218 [2021-05-06 08:28:00,595 INFO L226 Difference]: Without dead ends: 218 [2021-05-06 08:28:00,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 08:28:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-06 08:28:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-05-06 08:28:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:28:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2021-05-06 08:28:00,608 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 212 [2021-05-06 08:28:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:00,608 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2021-05-06 08:28:00,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2021-05-06 08:28:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2021-05-06 08:28:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-05-06 08:28:00,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:00,610 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:00,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:28:00,820 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:00,820 INFO L82 PathProgramCache]: Analyzing trace with hash -698087944, now seen corresponding path program 22 times [2021-05-06 08:28:00,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:00,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98137964] [2021-05-06 08:28:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:00,830 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:00,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108320781] [2021-05-06 08:28:00,830 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 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 08:28:01,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:28:01,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:01,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 08:28:01,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:01,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:01,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:01,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98137964] [2021-05-06 08:28:01,567 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:01,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108320781] [2021-05-06 08:28:01,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108320781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:01,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:01,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-06 08:28:01,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064121514] [2021-05-06 08:28:01,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 08:28:01,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:01,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 08:28:01,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:28:01,569 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2021-05-06 08:28:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:01,958 INFO L93 Difference]: Finished difference Result 227 states and 251 transitions. [2021-05-06 08:28:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 08:28:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 221 [2021-05-06 08:28:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:01,959 INFO L225 Difference]: With dead ends: 227 [2021-05-06 08:28:01,959 INFO L226 Difference]: Without dead ends: 227 [2021-05-06 08:28:01,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 08:28:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-06 08:28:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-05-06 08:28:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 173 states have (on average 1.138728323699422) internal successors, (197), 173 states have internal predecessors, (197), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 08:28:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 251 transitions. [2021-05-06 08:28:01,964 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 251 transitions. Word has length 221 [2021-05-06 08:28:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:01,964 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 251 transitions. [2021-05-06 08:28:01,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2021-05-06 08:28:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 251 transitions. [2021-05-06 08:28:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-06 08:28:01,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:01,965 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:02,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:28:02,171 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:02,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1668553085, now seen corresponding path program 23 times [2021-05-06 08:28:02,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:02,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863699178] [2021-05-06 08:28:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:02,176 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:02,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084555331] [2021-05-06 08:28:02,176 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 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 08:28:02,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-06 08:28:02,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:02,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 08:28:02,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:02,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 2323 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:02,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:02,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863699178] [2021-05-06 08:28:02,998 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:02,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084555331] [2021-05-06 08:28:02,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084555331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:02,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:02,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-06 08:28:02,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695937188] [2021-05-06 08:28:02,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 08:28:02,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:02,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 08:28:03,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-06 08:28:03,000 INFO L87 Difference]: Start difference. First operand 227 states and 251 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2021-05-06 08:28:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:03,418 INFO L93 Difference]: Finished difference Result 236 states and 261 transitions. [2021-05-06 08:28:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 08:28:03,419 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) Word has length 230 [2021-05-06 08:28:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:03,420 INFO L225 Difference]: With dead ends: 236 [2021-05-06 08:28:03,420 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 08:28:03,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 08:28:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 08:28:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-05-06 08:28:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 180 states have internal predecessors, (205), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 08:28:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 261 transitions. [2021-05-06 08:28:03,424 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 261 transitions. Word has length 230 [2021-05-06 08:28:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:03,424 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 261 transitions. [2021-05-06 08:28:03,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2021-05-06 08:28:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 261 transitions. [2021-05-06 08:28:03,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-05-06 08:28:03,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:03,425 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:03,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:28:03,631 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:03,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:03,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1189055912, now seen corresponding path program 24 times [2021-05-06 08:28:03,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:03,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139145007] [2021-05-06 08:28:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:03,636 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:03,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657724818] [2021-05-06 08:28:03,636 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 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 08:28:22,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-06 08:28:22,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:22,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:28:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:22,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:22,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:22,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:22,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:22,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:22,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 2532 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:23,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:23,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139145007] [2021-05-06 08:28:23,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:23,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657724818] [2021-05-06 08:28:23,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657724818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:23,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:23,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-06 08:28:23,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347772826] [2021-05-06 08:28:23,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 08:28:23,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:23,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 08:28:23,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:28:23,491 INFO L87 Difference]: Start difference. First operand 236 states and 261 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2021-05-06 08:28:23,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:23,950 INFO L93 Difference]: Finished difference Result 245 states and 271 transitions. [2021-05-06 08:28:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 08:28:23,951 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) Word has length 239 [2021-05-06 08:28:23,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:23,952 INFO L225 Difference]: With dead ends: 245 [2021-05-06 08:28:23,952 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 08:28:23,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 534.6ms TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 08:28:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 08:28:23,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-05-06 08:28:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 08:28:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2021-05-06 08:28:23,956 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 239 [2021-05-06 08:28:23,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:23,956 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2021-05-06 08:28:23,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2021-05-06 08:28:23,956 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2021-05-06 08:28:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-05-06 08:28:23,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:23,957 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:24,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:28:24,168 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:24,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1533843933, now seen corresponding path program 25 times [2021-05-06 08:28:24,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:24,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950264718] [2021-05-06 08:28:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:24,173 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:24,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44805914] [2021-05-06 08:28:24,174 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 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 08:28:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 08:28:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:24,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 2750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:24,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:24,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950264718] [2021-05-06 08:28:24,846 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:24,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44805914] [2021-05-06 08:28:24,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44805914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:24,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:24,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-05-06 08:28:24,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127466473] [2021-05-06 08:28:24,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 08:28:24,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 08:28:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 08:28:24,847 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2021-05-06 08:28:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:25,353 INFO L93 Difference]: Finished difference Result 254 states and 281 transitions. [2021-05-06 08:28:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 08:28:25,354 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) Word has length 248 [2021-05-06 08:28:25,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:25,355 INFO L225 Difference]: With dead ends: 254 [2021-05-06 08:28:25,355 INFO L226 Difference]: Without dead ends: 254 [2021-05-06 08:28:25,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 08:28:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-06 08:28:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-05-06 08:28:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.1391752577319587) internal successors, (221), 194 states have internal predecessors, (221), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:28:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 281 transitions. [2021-05-06 08:28:25,360 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 281 transitions. Word has length 248 [2021-05-06 08:28:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:25,360 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 281 transitions. [2021-05-06 08:28:25,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2021-05-06 08:28:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 281 transitions. [2021-05-06 08:28:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-05-06 08:28:25,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:25,361 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:25,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:28:25,578 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:25,578 INFO L82 PathProgramCache]: Analyzing trace with hash -436304200, now seen corresponding path program 26 times [2021-05-06 08:28:25,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:25,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238162194] [2021-05-06 08:28:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:25,584 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:25,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369890864] [2021-05-06 08:28:25,584 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 08:28:25,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:28:25,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:25,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 08:28:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:25,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:25,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 2977 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:26,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:26,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238162194] [2021-05-06 08:28:26,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:26,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369890864] [2021-05-06 08:28:26,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369890864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:26,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:26,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-06 08:28:26,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133512744] [2021-05-06 08:28:26,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 08:28:26,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:26,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 08:28:26,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 08:28:26,330 INFO L87 Difference]: Start difference. First operand 254 states and 281 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2021-05-06 08:28:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:26,845 INFO L93 Difference]: Finished difference Result 263 states and 291 transitions. [2021-05-06 08:28:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 08:28:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) Word has length 257 [2021-05-06 08:28:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:26,847 INFO L225 Difference]: With dead ends: 263 [2021-05-06 08:28:26,847 INFO L226 Difference]: Without dead ends: 263 [2021-05-06 08:28:26,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 603.5ms TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 08:28:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-06 08:28:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-05-06 08:28:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 08:28:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2021-05-06 08:28:26,853 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 257 [2021-05-06 08:28:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:26,854 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2021-05-06 08:28:26,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2021-05-06 08:28:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2021-05-06 08:28:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-06 08:28:26,855 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:26,855 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:27,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:27,074 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:27,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1775648195, now seen corresponding path program 27 times [2021-05-06 08:28:27,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:27,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133648393] [2021-05-06 08:28:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:27,078 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:27,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920171989] [2021-05-06 08:28:27,079 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 08:28:38,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-06 08:28:38,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:38,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 08:28:38,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:39,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 3213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:39,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:39,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133648393] [2021-05-06 08:28:39,695 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:39,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920171989] [2021-05-06 08:28:39,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920171989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:39,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:39,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-05-06 08:28:39,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957224297] [2021-05-06 08:28:39,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 08:28:39,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:39,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 08:28:39,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:28:39,696 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2021-05-06 08:28:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:40,228 INFO L93 Difference]: Finished difference Result 272 states and 301 transitions. [2021-05-06 08:28:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 08:28:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) Word has length 266 [2021-05-06 08:28:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:40,230 INFO L225 Difference]: With dead ends: 272 [2021-05-06 08:28:40,230 INFO L226 Difference]: Without dead ends: 272 [2021-05-06 08:28:40,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 662.9ms TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 08:28:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-06 08:28:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-05-06 08:28:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 208 states have internal predecessors, (237), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:28:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2021-05-06 08:28:40,235 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 266 [2021-05-06 08:28:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:40,235 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2021-05-06 08:28:40,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2021-05-06 08:28:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2021-05-06 08:28:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-05-06 08:28:40,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:40,236 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:40,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:40,448 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:40,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1189364504, now seen corresponding path program 28 times [2021-05-06 08:28:40,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:40,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007586815] [2021-05-06 08:28:40,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:40,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:40,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792542429] [2021-05-06 08:28:40,465 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 08:28:40,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:28:40,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:40,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 08:28:40,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:40,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 3458 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:41,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:41,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007586815] [2021-05-06 08:28:41,240 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:41,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792542429] [2021-05-06 08:28:41,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792542429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:41,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:41,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-06 08:28:41,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451440531] [2021-05-06 08:28:41,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 08:28:41,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:41,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 08:28:41,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 08:28:41,242 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2021-05-06 08:28:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:41,830 INFO L93 Difference]: Finished difference Result 281 states and 311 transitions. [2021-05-06 08:28:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 08:28:41,830 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) Word has length 275 [2021-05-06 08:28:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:41,831 INFO L225 Difference]: With dead ends: 281 [2021-05-06 08:28:41,831 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 08:28:41,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 711.0ms TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 08:28:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 08:28:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-05-06 08:28:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 215 states have internal predecessors, (245), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:28:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 311 transitions. [2021-05-06 08:28:41,840 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 311 transitions. Word has length 275 [2021-05-06 08:28:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:41,840 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 311 transitions. [2021-05-06 08:28:41,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2021-05-06 08:28:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 311 transitions. [2021-05-06 08:28:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-05-06 08:28:41,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:41,841 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:42,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 08:28:42,059 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:42,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:42,059 INFO L82 PathProgramCache]: Analyzing trace with hash -986813085, now seen corresponding path program 29 times [2021-05-06 08:28:42,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:42,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458601741] [2021-05-06 08:28:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:42,064 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:42,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645023313] [2021-05-06 08:28:42,065 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 08:28:54,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-06 08:28:54,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 08:28:54,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:54,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:54,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 3712 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:28:55,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:55,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458601741] [2021-05-06 08:28:55,505 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:55,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645023313] [2021-05-06 08:28:55,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645023313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:55,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:55,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-06 08:28:55,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866364395] [2021-05-06 08:28:55,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 08:28:55,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:55,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 08:28:55,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 08:28:55,507 INFO L87 Difference]: Start difference. First operand 281 states and 311 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2021-05-06 08:28:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:56,105 INFO L93 Difference]: Finished difference Result 290 states and 321 transitions. [2021-05-06 08:28:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 08:28:56,106 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) Word has length 284 [2021-05-06 08:28:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:56,107 INFO L225 Difference]: With dead ends: 290 [2021-05-06 08:28:56,107 INFO L226 Difference]: Without dead ends: 290 [2021-05-06 08:28:56,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 735.6ms TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 08:28:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-06 08:28:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-05-06 08:28:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 222 states have internal predecessors, (253), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:28:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2021-05-06 08:28:56,111 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 284 [2021-05-06 08:28:56,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:56,112 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2021-05-06 08:28:56,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2021-05-06 08:28:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2021-05-06 08:28:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-05-06 08:28:56,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:56,113 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:56,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:56,323 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:56,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1480042360, now seen corresponding path program 30 times [2021-05-06 08:28:56,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:56,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129474432] [2021-05-06 08:28:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:56,329 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:56,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919953322] [2021-05-06 08:28:56,329 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 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 08:29:23,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-06 08:29:23,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:29:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 08:29:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:29:23,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 3975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:29:23,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:29:23,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129474432] [2021-05-06 08:29:23,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:29:23,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919953322] [2021-05-06 08:29:23,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919953322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:29:23,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:29:23,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-06 08:29:23,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996943425] [2021-05-06 08:29:23,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 08:29:23,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:29:23,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 08:29:23,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 08:29:23,983 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2021-05-06 08:29:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:29:24,611 INFO L93 Difference]: Finished difference Result 299 states and 331 transitions. [2021-05-06 08:29:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 08:29:24,611 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) Word has length 293 [2021-05-06 08:29:24,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:29:24,612 INFO L225 Difference]: With dead ends: 299 [2021-05-06 08:29:24,612 INFO L226 Difference]: Without dead ends: 299 [2021-05-06 08:29:24,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 787.0ms TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 08:29:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-06 08:29:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2021-05-06 08:29:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 229 states have internal predecessors, (261), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 08:29:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 331 transitions. [2021-05-06 08:29:24,617 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 331 transitions. Word has length 293 [2021-05-06 08:29:24,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:29:24,617 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 331 transitions. [2021-05-06 08:29:24,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2021-05-06 08:29:24,618 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 331 transitions. [2021-05-06 08:29:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-05-06 08:29:24,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:29:24,619 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:29:24,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:29:24,834 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:29:24,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:29:24,834 INFO L82 PathProgramCache]: Analyzing trace with hash -856296189, now seen corresponding path program 31 times [2021-05-06 08:29:24,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:29:24,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655454910] [2021-05-06 08:29:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:29:24,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:29:24,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895663931] [2021-05-06 08:29:24,839 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 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 08:29:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:29:24,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 08:29:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:29:24,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:24,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:24,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:24,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:24,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:24,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:24,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:24,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 4247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:29:25,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:29:25,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655454910] [2021-05-06 08:29:25,645 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:29:25,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895663931] [2021-05-06 08:29:25,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895663931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:29:25,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:29:25,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-05-06 08:29:25,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484843427] [2021-05-06 08:29:25,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 08:29:25,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:29:25,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 08:29:25,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 08:29:25,647 INFO L87 Difference]: Start difference. First operand 299 states and 331 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2021-05-06 08:29:26,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:29:26,213 INFO L93 Difference]: Finished difference Result 308 states and 341 transitions. [2021-05-06 08:29:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 08:29:26,214 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) Word has length 302 [2021-05-06 08:29:26,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:29:26,215 INFO L225 Difference]: With dead ends: 308 [2021-05-06 08:29:26,215 INFO L226 Difference]: Without dead ends: 308 [2021-05-06 08:29:26,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 738.1ms TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 08:29:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-06 08:29:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-05-06 08:29:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.1398305084745763) internal successors, (269), 236 states have internal predecessors, (269), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:29:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 341 transitions. [2021-05-06 08:29:26,219 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 341 transitions. Word has length 302 [2021-05-06 08:29:26,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:29:26,219 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 341 transitions. [2021-05-06 08:29:26,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2021-05-06 08:29:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 341 transitions. [2021-05-06 08:29:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-05-06 08:29:26,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:29:26,221 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:29:26,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:29:26,437 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:29:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:29:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1998670888, now seen corresponding path program 32 times [2021-05-06 08:29:26,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:29:26,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713655621] [2021-05-06 08:29:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:29:26,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:29:26,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344901066] [2021-05-06 08:29:26,442 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 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 08:29:26,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:29:26,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:29:26,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 08:29:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:29:26,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 4528 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:29:27,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:29:27,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713655621] [2021-05-06 08:29:27,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:29:27,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344901066] [2021-05-06 08:29:27,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344901066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:29:27,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:29:27,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-06 08:29:27,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045075998] [2021-05-06 08:29:27,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 08:29:27,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:29:27,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 08:29:27,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 08:29:27,288 INFO L87 Difference]: Start difference. First operand 308 states and 341 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2021-05-06 08:29:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:29:27,900 INFO L93 Difference]: Finished difference Result 317 states and 351 transitions. [2021-05-06 08:29:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 08:29:27,900 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) Word has length 311 [2021-05-06 08:29:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:29:27,901 INFO L225 Difference]: With dead ends: 317 [2021-05-06 08:29:27,901 INFO L226 Difference]: Without dead ends: 317 [2021-05-06 08:29:27,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 765.2ms TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 08:29:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-06 08:29:27,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2021-05-06 08:29:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 243 states have (on average 1.139917695473251) internal successors, (277), 243 states have internal predecessors, (277), 38 states have call successors, (38), 37 states have call predecessors, (38), 35 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 08:29:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 351 transitions. [2021-05-06 08:29:27,905 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 351 transitions. Word has length 311 [2021-05-06 08:29:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:29:27,906 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 351 transitions. [2021-05-06 08:29:27,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2021-05-06 08:29:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 351 transitions. [2021-05-06 08:29:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-05-06 08:29:27,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:29:27,907 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:29:28,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 08:29:28,121 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:29:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:29:28,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1963381923, now seen corresponding path program 33 times [2021-05-06 08:29:28,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:29:28,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519265428] [2021-05-06 08:29:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:29:28,126 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:29:28,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067413004] [2021-05-06 08:29:28,126 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 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