/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:15:27,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:15:27,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:15:27,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:15:27,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:15:27,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:15:27,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:15:27,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:15:27,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:15:27,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:15:27,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:15:27,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:15:27,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:15:27,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:15:27,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:15:27,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:15:27,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:15:27,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:15:27,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:15:27,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:15:27,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:15:27,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:15:27,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:15:27,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:15:27,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:15:27,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:15:27,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:15:27,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:15:27,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:15:27,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:15:27,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:15:27,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:15:27,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:15:27,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:15:27,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:15:27,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:15:27,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:15:27,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:15:27,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:15:27,378 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:15:27,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:15:27,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:15:27,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:15:27,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:15:27,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:15:27,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:15:27,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:15:27,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:15:27,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:15:27,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:15:27,380 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:15:27,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:15:27,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:15:27,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:15:27,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:15:27,725 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:15:27,726 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:15:27,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2021-05-06 08:15:27,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431264240/3b0a8f52ebd8468bb5b67de6b4ffb4ac/FLAGe01d6fd50 [2021-05-06 08:15:28,243 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:15:28,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2021-05-06 08:15:28,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431264240/3b0a8f52ebd8468bb5b67de6b4ffb4ac/FLAGe01d6fd50 [2021-05-06 08:15:28,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431264240/3b0a8f52ebd8468bb5b67de6b4ffb4ac [2021-05-06 08:15:28,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:15:28,274 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:15:28,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:15:28,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:15:28,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:15:28,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:15:28" (1/1) ... [2021-05-06 08:15:28,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175fa9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28, skipping insertion in model container [2021-05-06 08:15:28,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:15:28" (1/1) ... [2021-05-06 08:15:28,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:15:28,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:15:28,436 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2021-05-06 08:15:28,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:15:28,463 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:15:28,503 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c[490,503] [2021-05-06 08:15:28,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:15:28,531 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:15:28,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28 WrapperNode [2021-05-06 08:15:28,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:15:28,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:15:28,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:15:28,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:15:28,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28" (1/1) ... [2021-05-06 08:15:28,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28" (1/1) ... [2021-05-06 08:15:28,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28" (1/1) ... [2021-05-06 08:15:28,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28" (1/1) ... [2021-05-06 08:15:28,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28" (1/1) ... [2021-05-06 08:15:28,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28" (1/1) ... [2021-05-06 08:15:28,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28" (1/1) ... [2021-05-06 08:15:28,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:15:28,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:15:28,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:15:28,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:15:28,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28" (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 08:15:28,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:15:28,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:15:28,647 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:15:28,647 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:15:28,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:15:28,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:15:28,647 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:15:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:15:28,648 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:15:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:15:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:15:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:15:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:15:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:15:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:15:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:15:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:15:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:15:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:15:28,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:15:28,979 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:15:28,980 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:15:28,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:15:28 BoogieIcfgContainer [2021-05-06 08:15:28,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:15:28,982 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:15:28,982 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:15:28,982 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:15:28,985 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:15:28" (1/1) ... [2021-05-06 08:15:29,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:15:29 BasicIcfg [2021-05-06 08:15:29,012 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:15:29,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:15:29,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:15:29,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:15:29,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:15:28" (1/4) ... [2021-05-06 08:15:29,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3720fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:15:29, skipping insertion in model container [2021-05-06 08:15:29,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:15:28" (2/4) ... [2021-05-06 08:15:29,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3720fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:15:29, skipping insertion in model container [2021-05-06 08:15:29,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:15:28" (3/4) ... [2021-05-06 08:15:29,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3720fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:15:29, skipping insertion in model container [2021-05-06 08:15:29,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:15:29" (4/4) ... [2021-05-06 08:15:29,019 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.cJordan [2021-05-06 08:15:29,024 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:15:29,035 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:15:29,050 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:15:29,076 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:15:29,077 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:15:29,077 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:15:29,077 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:15:29,077 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:15:29,077 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:15:29,077 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:15:29,077 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:15:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:15:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 08:15:29,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:29,103 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:29,104 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:29,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:29,108 INFO L82 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2021-05-06 08:15:29,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:29,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607736714] [2021-05-06 08:15:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:29,240 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:29,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078179782] [2021-05-06 08:15:29,241 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 08:15:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:29,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:15:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:15:29,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:29,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607736714] [2021-05-06 08:15:29,498 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:29,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078179782] [2021-05-06 08:15:29,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078179782] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:15:29,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:15:29,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:15:29,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126469973] [2021-05-06 08:15:29,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:15:29,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:15:29,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:15:29,519 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:15:29,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:29,534 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-06 08:15:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:15:29,536 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2021-05-06 08:15:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:29,542 INFO L225 Difference]: With dead ends: 39 [2021-05-06 08:15:29,542 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 08:15:29,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:15:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 08:15:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 08:15:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:15:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-06 08:15:29,577 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-06 08:15:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:29,578 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-06 08:15:29,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:15:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-06 08:15:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:15:29,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:29,580 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:29,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:15:29,804 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:29,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:29,805 INFO L82 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2021-05-06 08:15:29,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:29,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580113411] [2021-05-06 08:15:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:29,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:29,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488434588] [2021-05-06 08:15:29,829 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 08:15:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:29,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:15:29,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:29,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:29,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:15:30,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580113411] [2021-05-06 08:15:30,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488434588] [2021-05-06 08:15:30,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488434588] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:15:30,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:15:30,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:15:30,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919633090] [2021-05-06 08:15:30,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:15:30,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:15:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:15:30,089 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:15:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:30,107 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-06 08:15:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:15:30,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:15:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:30,112 INFO L225 Difference]: With dead ends: 36 [2021-05-06 08:15:30,112 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 08:15:30,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:15:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 08:15:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 08:15:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:15:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-06 08:15:30,126 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-06 08:15:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:30,127 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-06 08:15:30,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:15:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-06 08:15:30,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:15:30,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:30,128 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:30,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:30,346 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:30,346 INFO L82 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2021-05-06 08:15:30,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:30,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877187949] [2021-05-06 08:15:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:30,359 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:30,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259562479] [2021-05-06 08:15:30,360 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 08:15:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:30,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:15:30,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:30,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:15:30,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:30,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877187949] [2021-05-06 08:15:30,511 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:30,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259562479] [2021-05-06 08:15:30,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259562479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:30,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:30,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:15:30,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168468518] [2021-05-06 08:15:30,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:15:30,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:30,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:15:30,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:15:30,512 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:15:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:30,602 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-05-06 08:15:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:15:30,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 08:15:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:30,605 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:15:30,605 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:15:30,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:15:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:15:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-06 08:15:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:15:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:15:30,612 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-06 08:15:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:30,612 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:15:30,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:15:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:15:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:15:30,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:30,613 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:30,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:30,826 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:30,828 INFO L82 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2021-05-06 08:15:30,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:30,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026242104] [2021-05-06 08:15:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:30,883 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:30,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080311402] [2021-05-06 08:15:30,883 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 08:15:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:30,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:15:30,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:31,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:15:31,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:31,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026242104] [2021-05-06 08:15:31,092 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:31,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080311402] [2021-05-06 08:15:31,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080311402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:31,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:31,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:15:31,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486150777] [2021-05-06 08:15:31,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:15:31,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:31,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:15:31,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:15:31,094 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:15:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:31,238 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2021-05-06 08:15:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:15:31,239 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:15:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:31,241 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:15:31,241 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 08:15:31,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:15:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 08:15:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-06 08:15:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:15:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-06 08:15:31,250 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-06 08:15:31,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:31,250 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-06 08:15:31,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:15:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-06 08:15:31,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:15:31,251 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:31,252 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:31,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:31,469 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:31,470 INFO L82 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2021-05-06 08:15:31,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:31,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676677627] [2021-05-06 08:15:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:31,496 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:31,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68145065] [2021-05-06 08:15:31,496 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 08:15:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:31,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:15:31,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:31,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:15:31,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:31,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676677627] [2021-05-06 08:15:31,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:31,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68145065] [2021-05-06 08:15:31,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68145065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:15:31,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:15:31,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:15:31,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146376212] [2021-05-06 08:15:31,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:15:31,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:31,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:15:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:15:31,661 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:15:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:31,690 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-05-06 08:15:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:15:31,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:15:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:31,694 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:15:31,694 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:15:31,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:15:31,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:15:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 08:15:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:15:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-06 08:15:31,699 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-06 08:15:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:31,699 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-06 08:15:31,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:15:31,699 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-06 08:15:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:15:31,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:31,700 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:31,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:31,909 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:31,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:31,909 INFO L82 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2021-05-06 08:15:31,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:31,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892299774] [2021-05-06 08:15:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:31,936 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:31,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516897240] [2021-05-06 08:15:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:32,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:15:32,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:32,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:15:32,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:32,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892299774] [2021-05-06 08:15:32,365 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:32,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516897240] [2021-05-06 08:15:32,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516897240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:32,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:32,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:15:32,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098501735] [2021-05-06 08:15:32,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:15:32,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:32,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:15:32,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:15:32,370 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:15:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:32,525 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-06 08:15:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:15:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-06 08:15:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:32,526 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:15:32,526 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:15:32,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:15:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:15:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 08:15:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:15:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-06 08:15:32,542 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-06 08:15:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:32,544 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-06 08:15:32,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:15:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-06 08:15:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:15:32,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:32,548 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:32,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:32,773 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2021-05-06 08:15:32,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:32,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989667055] [2021-05-06 08:15:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:32,797 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:32,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105005180] [2021-05-06 08:15:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:32,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:15:32,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:32,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:15:33,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:33,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989667055] [2021-05-06 08:15:33,156 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:33,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105005180] [2021-05-06 08:15:33,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105005180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:33,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:33,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:15:33,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588415256] [2021-05-06 08:15:33,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:15:33,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:33,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:15:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:15:33,158 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:15:33,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:33,282 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2021-05-06 08:15:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:15:33,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:15:33,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:33,284 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:15:33,284 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:15:33,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:15:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:15:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 08:15:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:15:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-06 08:15:33,290 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-06 08:15:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:33,290 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-06 08:15:33,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:15:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-06 08:15:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:15:33,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:33,291 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:33,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:33,505 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:33,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2021-05-06 08:15:33,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:33,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140230857] [2021-05-06 08:15:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:33,516 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:33,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939152709] [2021-05-06 08:15:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:33,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:15:33,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:33,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-06 08:15:33,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:33,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140230857] [2021-05-06 08:15:33,870 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:33,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939152709] [2021-05-06 08:15:33,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939152709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:33,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:33,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:15:33,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998958083] [2021-05-06 08:15:33,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:15:33,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:33,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:15:33,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:15:33,872 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:15:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:34,055 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-05-06 08:15:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:15:34,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 08:15:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:34,058 INFO L225 Difference]: With dead ends: 64 [2021-05-06 08:15:34,058 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 08:15:34,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:15:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 08:15:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 08:15:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:15:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-06 08:15:34,065 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-06 08:15:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:34,065 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-06 08:15:34,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:15:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-06 08:15:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:15:34,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:34,066 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:34,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:15:34,293 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:34,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1782154901, now seen corresponding path program 1 times [2021-05-06 08:15:34,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:34,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140778922] [2021-05-06 08:15:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:34,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:34,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385920138] [2021-05-06 08:15:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:15:34,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:34,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:15:34,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140778922] [2021-05-06 08:15:34,613 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385920138] [2021-05-06 08:15:34,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385920138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:34,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:34,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:15:34,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310103173] [2021-05-06 08:15:34,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:15:34,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:34,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:15:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:15:34,622 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:15:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:34,706 INFO L93 Difference]: Finished difference Result 94 states and 129 transitions. [2021-05-06 08:15:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:15:34,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-06 08:15:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:34,708 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:15:34,708 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 08:15:34,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:15:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 08:15:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-06 08:15:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:15:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-06 08:15:34,730 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-06 08:15:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:34,731 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-06 08:15:34,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:15:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-06 08:15:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 08:15:34,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:34,732 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:34,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:34,957 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:34,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2021-05-06 08:15:34,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:34,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881309173] [2021-05-06 08:15:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:34,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:34,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51822262] [2021-05-06 08:15:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:35,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:15:35,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:35,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:15:35,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:35,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881309173] [2021-05-06 08:15:35,445 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:35,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51822262] [2021-05-06 08:15:35,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51822262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:35,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:35,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:15:35,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255751943] [2021-05-06 08:15:35,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:15:35,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:35,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:15:35,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:15:35,447 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:15:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:35,506 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2021-05-06 08:15:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:15:35,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-06 08:15:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:35,513 INFO L225 Difference]: With dead ends: 99 [2021-05-06 08:15:35,513 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 08:15:35,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:15:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 08:15:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 08:15:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:15:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-06 08:15:35,534 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-06 08:15:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:35,534 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-06 08:15:35,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:15:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-06 08:15:35,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:15:35,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:35,535 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:35,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:35,762 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:35,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1491020248, now seen corresponding path program 1 times [2021-05-06 08:15:35,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:35,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117427305] [2021-05-06 08:15:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:35,795 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:35,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849921922] [2021-05-06 08:15:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:35,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:15:35,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:35,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:15:36,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:36,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117427305] [2021-05-06 08:15:36,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:36,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849921922] [2021-05-06 08:15:36,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849921922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:36,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:36,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:15:36,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256470889] [2021-05-06 08:15:36,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:15:36,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:36,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:15:36,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:15:36,112 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:15:36,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:36,349 INFO L93 Difference]: Finished difference Result 170 states and 243 transitions. [2021-05-06 08:15:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:15:36,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 08:15:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:36,351 INFO L225 Difference]: With dead ends: 170 [2021-05-06 08:15:36,351 INFO L226 Difference]: Without dead ends: 170 [2021-05-06 08:15:36,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:15:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-06 08:15:36,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-06 08:15:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:15:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-06 08:15:36,361 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-06 08:15:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:36,362 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-06 08:15:36,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:15:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-06 08:15:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 08:15:36,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:36,363 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:36,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:15:36,565 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1948826973, now seen corresponding path program 1 times [2021-05-06 08:15:36,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:36,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983729023] [2021-05-06 08:15:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:36,588 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:36,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103696408] [2021-05-06 08:15:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:36,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:15:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:36,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:15:37,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:37,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983729023] [2021-05-06 08:15:37,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:37,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103696408] [2021-05-06 08:15:37,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103696408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:37,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:37,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:15:37,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930490806] [2021-05-06 08:15:37,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:15:37,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:37,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:15:37,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:15:37,289 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:15:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:37,432 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-05-06 08:15:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:15:37,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-06 08:15:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:37,455 INFO L225 Difference]: With dead ends: 142 [2021-05-06 08:15:37,455 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 08:15:37,456 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:15:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 08:15:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-06 08:15:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:15:37,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-06 08:15:37,472 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-06 08:15:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:37,472 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-06 08:15:37,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:15:37,472 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-06 08:15:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:15:37,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:37,482 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:37,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:37,699 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:37,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1844620331, now seen corresponding path program 1 times [2021-05-06 08:15:37,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:37,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367433433] [2021-05-06 08:15:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:37,742 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:37,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864198532] [2021-05-06 08:15:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:37,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:15:37,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:37,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:15:38,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:38,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367433433] [2021-05-06 08:15:38,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:38,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864198532] [2021-05-06 08:15:38,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864198532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:38,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:38,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:15:38,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353821384] [2021-05-06 08:15:38,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:15:38,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:38,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:15:38,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:15:38,181 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:15:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:38,306 INFO L93 Difference]: Finished difference Result 169 states and 222 transitions. [2021-05-06 08:15:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:15:38,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-06 08:15:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:38,308 INFO L225 Difference]: With dead ends: 169 [2021-05-06 08:15:38,308 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 08:15:38,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:15:38,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 08:15:38,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-06 08:15:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:15:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-06 08:15:38,317 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-06 08:15:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:38,317 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-06 08:15:38,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:15:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-06 08:15:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:15:38,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:38,336 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:38,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:15:38,557 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash 918639692, now seen corresponding path program 1 times [2021-05-06 08:15:38,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:38,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646030056] [2021-05-06 08:15:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:38,565 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:38,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656562366] [2021-05-06 08:15:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:38,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:15:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:38,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:15:38,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:38,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646030056] [2021-05-06 08:15:38,843 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:38,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656562366] [2021-05-06 08:15:38,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656562366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:38,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:38,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:15:38,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159696325] [2021-05-06 08:15:38,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:15:38,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:38,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:15:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:15:38,845 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:15:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:38,987 INFO L93 Difference]: Finished difference Result 212 states and 294 transitions. [2021-05-06 08:15:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:15:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2021-05-06 08:15:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:38,990 INFO L225 Difference]: With dead ends: 212 [2021-05-06 08:15:38,990 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 08:15:38,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:15:38,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 08:15:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-05-06 08:15:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.2857142857142858) internal successors, (162), 132 states have internal predecessors, (162), 65 states have call successors, (65), 17 states have call predecessors, (65), 16 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:15:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 289 transitions. [2021-05-06 08:15:39,005 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 289 transitions. Word has length 68 [2021-05-06 08:15:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:39,006 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 289 transitions. [2021-05-06 08:15:39,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:15:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 289 transitions. [2021-05-06 08:15:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:15:39,007 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:39,007 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:39,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:39,226 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:39,226 INFO L82 PathProgramCache]: Analyzing trace with hash -210356579, now seen corresponding path program 2 times [2021-05-06 08:15:39,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:39,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515377114] [2021-05-06 08:15:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:39,242 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:39,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604566042] [2021-05-06 08:15:39,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:39,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:39,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:39,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:15:39,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:39,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 08:15:39,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:39,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515377114] [2021-05-06 08:15:39,605 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:39,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604566042] [2021-05-06 08:15:39,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604566042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:39,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:39,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:15:39,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348525910] [2021-05-06 08:15:39,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:15:39,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:39,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:15:39,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:15:39,606 INFO L87 Difference]: Start difference. First operand 208 states and 289 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:15:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:39,846 INFO L93 Difference]: Finished difference Result 214 states and 294 transitions. [2021-05-06 08:15:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:15:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-06 08:15:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:39,848 INFO L225 Difference]: With dead ends: 214 [2021-05-06 08:15:39,848 INFO L226 Difference]: Without dead ends: 214 [2021-05-06 08:15:39,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:15:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-06 08:15:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2021-05-06 08:15:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 129 states have (on average 1.2790697674418605) internal successors, (165), 135 states have internal predecessors, (165), 65 states have call successors, (65), 18 states have call predecessors, (65), 17 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:15:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 292 transitions. [2021-05-06 08:15:39,866 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 292 transitions. Word has length 73 [2021-05-06 08:15:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:39,866 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 292 transitions. [2021-05-06 08:15:39,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:15:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 292 transitions. [2021-05-06 08:15:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 08:15:39,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:39,868 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:40,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:15:40,084 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:40,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:40,084 INFO L82 PathProgramCache]: Analyzing trace with hash 952478412, now seen corresponding path program 3 times [2021-05-06 08:15:40,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:40,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153218475] [2021-05-06 08:15:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:40,092 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:40,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024244092] [2021-05-06 08:15:40,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:40,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:15:40,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:40,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:15:40,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:40,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:40,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 08:15:41,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:41,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153218475] [2021-05-06 08:15:41,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:41,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024244092] [2021-05-06 08:15:41,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024244092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:41,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:41,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:15:41,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24643820] [2021-05-06 08:15:41,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:15:41,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:41,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:15:41,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:15:41,305 INFO L87 Difference]: Start difference. First operand 212 states and 292 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:15:41,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:41,857 INFO L93 Difference]: Finished difference Result 222 states and 300 transitions. [2021-05-06 08:15:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:15:41,858 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-06 08:15:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:41,860 INFO L225 Difference]: With dead ends: 222 [2021-05-06 08:15:41,860 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 08:15:41,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:15:41,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 08:15:41,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2021-05-06 08:15:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 135 states have (on average 1.2666666666666666) internal successors, (171), 141 states have internal predecessors, (171), 65 states have call successors, (65), 20 states have call predecessors, (65), 19 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:15:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 298 transitions. [2021-05-06 08:15:41,884 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 298 transitions. Word has length 78 [2021-05-06 08:15:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:41,885 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 298 transitions. [2021-05-06 08:15:41,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:15:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 298 transitions. [2021-05-06 08:15:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 08:15:41,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:41,886 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:42,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:15:42,103 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:42,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1350616622, now seen corresponding path program 2 times [2021-05-06 08:15:42,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:42,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813402300] [2021-05-06 08:15:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:42,119 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:42,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056250919] [2021-05-06 08:15:42,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:42,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:42,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:15:42,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:42,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 08:15:42,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813402300] [2021-05-06 08:15:42,583 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056250919] [2021-05-06 08:15:42,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056250919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:42,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:42,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:15:42,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243810674] [2021-05-06 08:15:42,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:15:42,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:42,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:15:42,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:15:42,588 INFO L87 Difference]: Start difference. First operand 220 states and 298 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:15:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:42,802 INFO L93 Difference]: Finished difference Result 283 states and 405 transitions. [2021-05-06 08:15:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:15:42,802 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-05-06 08:15:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:42,804 INFO L225 Difference]: With dead ends: 283 [2021-05-06 08:15:42,804 INFO L226 Difference]: Without dead ends: 283 [2021-05-06 08:15:42,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:15:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-06 08:15:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 253. [2021-05-06 08:15:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 150 states have (on average 1.2933333333333332) internal successors, (194), 157 states have internal predecessors, (194), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 08:15:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 355 transitions. [2021-05-06 08:15:42,817 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 355 transitions. Word has length 82 [2021-05-06 08:15:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:42,817 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 355 transitions. [2021-05-06 08:15:42,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:15:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 355 transitions. [2021-05-06 08:15:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 08:15:42,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:42,818 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:43,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:15:43,033 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:43,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1080401827, now seen corresponding path program 1 times [2021-05-06 08:15:43,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:43,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264692343] [2021-05-06 08:15:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:43,042 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:43,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009889153] [2021-05-06 08:15:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:43,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:15:43,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:43,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 08:15:43,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:43,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264692343] [2021-05-06 08:15:43,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:43,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009889153] [2021-05-06 08:15:43,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009889153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:43,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:43,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:15:43,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953734202] [2021-05-06 08:15:43,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:15:43,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:43,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:15:43,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:15:43,336 INFO L87 Difference]: Start difference. First operand 253 states and 355 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:15:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:43,407 INFO L93 Difference]: Finished difference Result 256 states and 358 transitions. [2021-05-06 08:15:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:15:43,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-06 08:15:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:43,410 INFO L225 Difference]: With dead ends: 256 [2021-05-06 08:15:43,410 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 08:15:43,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:15:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 08:15:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-05-06 08:15:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 160 states have internal predecessors, (197), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 08:15:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 358 transitions. [2021-05-06 08:15:43,421 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 358 transitions. Word has length 83 [2021-05-06 08:15:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:43,422 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 358 transitions. [2021-05-06 08:15:43,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:15:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 358 transitions. [2021-05-06 08:15:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 08:15:43,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:43,423 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:43,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:15:43,644 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash 900405455, now seen corresponding path program 1 times [2021-05-06 08:15:43,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:43,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113526274] [2021-05-06 08:15:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:43,669 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:43,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932205676] [2021-05-06 08:15:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:43,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 08:15:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:44,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 08:15:44,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:44,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113526274] [2021-05-06 08:15:44,062 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:44,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932205676] [2021-05-06 08:15:44,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932205676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:44,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:44,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:15:44,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501519818] [2021-05-06 08:15:44,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:15:44,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:44,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:15:44,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:15:44,068 INFO L87 Difference]: Start difference. First operand 256 states and 358 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:15:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:44,455 INFO L93 Difference]: Finished difference Result 287 states and 409 transitions. [2021-05-06 08:15:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:15:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2021-05-06 08:15:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:44,457 INFO L225 Difference]: With dead ends: 287 [2021-05-06 08:15:44,458 INFO L226 Difference]: Without dead ends: 286 [2021-05-06 08:15:44,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:15:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-06 08:15:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-06 08:15:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 168 states have (on average 1.3035714285714286) internal successors, (219), 176 states have internal predecessors, (219), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-06 08:15:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 406 transitions. [2021-05-06 08:15:44,468 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 406 transitions. Word has length 84 [2021-05-06 08:15:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:44,471 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 406 transitions. [2021-05-06 08:15:44,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:15:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 406 transitions. [2021-05-06 08:15:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:15:44,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:44,472 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:44,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:15:44,698 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:44,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:44,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2138218929, now seen corresponding path program 2 times [2021-05-06 08:15:44,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:44,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973579539] [2021-05-06 08:15:44,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:44,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:44,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994612673] [2021-05-06 08:15:44,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:44,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:44,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:15:44,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:44,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:44,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:44,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:44,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:44,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:44,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:44,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:44,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:44,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 08:15:45,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:45,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973579539] [2021-05-06 08:15:45,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:45,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994612673] [2021-05-06 08:15:45,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994612673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:45,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:45,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:15:45,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416443911] [2021-05-06 08:15:45,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:15:45,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:45,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:15:45,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:15:45,087 INFO L87 Difference]: Start difference. First operand 285 states and 406 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:15:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:45,184 INFO L93 Difference]: Finished difference Result 324 states and 442 transitions. [2021-05-06 08:15:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:15:45,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-06 08:15:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:45,186 INFO L225 Difference]: With dead ends: 324 [2021-05-06 08:15:45,186 INFO L226 Difference]: Without dead ends: 324 [2021-05-06 08:15:45,187 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:15:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-06 08:15:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-05-06 08:15:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 196 states have (on average 1.2653061224489797) internal successors, (248), 203 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 08:15:45,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 441 transitions. [2021-05-06 08:15:45,198 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 441 transitions. Word has length 87 [2021-05-06 08:15:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:45,198 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 441 transitions. [2021-05-06 08:15:45,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:15:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 441 transitions. [2021-05-06 08:15:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:15:45,200 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:45,200 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:45,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:15:45,420 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:45,420 INFO L82 PathProgramCache]: Analyzing trace with hash 118626568, now seen corresponding path program 1 times [2021-05-06 08:15:45,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:45,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898033236] [2021-05-06 08:15:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:45,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:45,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985807680] [2021-05-06 08:15:45,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:45,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:15:45,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:45,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 08:15:45,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:45,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898033236] [2021-05-06 08:15:45,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:45,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985807680] [2021-05-06 08:15:45,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985807680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:45,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:45,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:15:45,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749641185] [2021-05-06 08:15:45,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:15:45,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:45,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:15:45,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:15:45,729 INFO L87 Difference]: Start difference. First operand 323 states and 441 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:15:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:45,826 INFO L93 Difference]: Finished difference Result 325 states and 441 transitions. [2021-05-06 08:15:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:15:45,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-06 08:15:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:45,828 INFO L225 Difference]: With dead ends: 325 [2021-05-06 08:15:45,828 INFO L226 Difference]: Without dead ends: 325 [2021-05-06 08:15:45,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:15:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-06 08:15:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-05-06 08:15:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 198 states have (on average 1.2525252525252526) internal successors, (248), 205 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 08:15:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 441 transitions. [2021-05-06 08:15:45,839 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 441 transitions. Word has length 89 [2021-05-06 08:15:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:45,840 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 441 transitions. [2021-05-06 08:15:45,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:15:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 441 transitions. [2021-05-06 08:15:45,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 08:15:45,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:45,842 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:46,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:15:46,065 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:46,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:46,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1881160278, now seen corresponding path program 2 times [2021-05-06 08:15:46,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:46,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006864727] [2021-05-06 08:15:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:46,072 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:46,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49748601] [2021-05-06 08:15:46,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:46,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:46,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:46,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:15:46,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:46,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-06 08:15:46,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:46,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006864727] [2021-05-06 08:15:46,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:46,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49748601] [2021-05-06 08:15:46,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49748601] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:15:46,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:15:46,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:15:46,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769744384] [2021-05-06 08:15:46,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:15:46,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:46,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:15:46,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:15:46,437 INFO L87 Difference]: Start difference. First operand 325 states and 441 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:15:46,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:46,546 INFO L93 Difference]: Finished difference Result 427 states and 611 transitions. [2021-05-06 08:15:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:15:46,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-06 08:15:46,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:46,549 INFO L225 Difference]: With dead ends: 427 [2021-05-06 08:15:46,549 INFO L226 Difference]: Without dead ends: 427 [2021-05-06 08:15:46,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:15:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-06 08:15:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 361. [2021-05-06 08:15:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 222 states have (on average 1.2657657657657657) internal successors, (281), 229 states have internal predecessors, (281), 110 states have call successors, (110), 29 states have call predecessors, (110), 28 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:15:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2021-05-06 08:15:46,562 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 93 [2021-05-06 08:15:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:46,562 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2021-05-06 08:15:46,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:15:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2021-05-06 08:15:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 08:15:46,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:46,579 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:46,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:46,801 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash 653404933, now seen corresponding path program 1 times [2021-05-06 08:15:46,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:46,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950820045] [2021-05-06 08:15:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:46,807 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:46,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335131070] [2021-05-06 08:15:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:46,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 08:15:46,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:47,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:47,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:48,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:48,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:48,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 44 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-05-06 08:15:48,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:48,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950820045] [2021-05-06 08:15:48,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:48,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335131070] [2021-05-06 08:15:48,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335131070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:48,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:48,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:15:48,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940838818] [2021-05-06 08:15:48,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:15:48,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:48,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:15:48,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:15:48,046 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:15:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:48,594 INFO L93 Difference]: Finished difference Result 367 states and 503 transitions. [2021-05-06 08:15:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:15:48,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 08:15:48,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:48,597 INFO L225 Difference]: With dead ends: 367 [2021-05-06 08:15:48,597 INFO L226 Difference]: Without dead ends: 367 [2021-05-06 08:15:48,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 439.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:15:48,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-06 08:15:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-05-06 08:15:48,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 225 states have (on average 1.2622222222222221) internal successors, (284), 232 states have internal predecessors, (284), 110 states have call successors, (110), 30 states have call predecessors, (110), 29 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:15:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 501 transitions. [2021-05-06 08:15:48,609 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 501 transitions. Word has length 101 [2021-05-06 08:15:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:48,610 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 501 transitions. [2021-05-06 08:15:48,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:15:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 501 transitions. [2021-05-06 08:15:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:15:48,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:48,612 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:48,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:48,831 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:48,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:48,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1232145013, now seen corresponding path program 3 times [2021-05-06 08:15:48,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:48,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915331357] [2021-05-06 08:15:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:48,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:48,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035724719] [2021-05-06 08:15:48,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:48,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:15:48,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:48,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:15:48,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:49,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:49,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-06 08:15:49,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:49,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915331357] [2021-05-06 08:15:49,163 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:49,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035724719] [2021-05-06 08:15:49,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035724719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:49,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:49,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:15:49,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649159479] [2021-05-06 08:15:49,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:15:49,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:49,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:15:49,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:15:49,164 INFO L87 Difference]: Start difference. First operand 365 states and 501 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:15:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:49,264 INFO L93 Difference]: Finished difference Result 369 states and 504 transitions. [2021-05-06 08:15:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:15:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2021-05-06 08:15:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:49,282 INFO L225 Difference]: With dead ends: 369 [2021-05-06 08:15:49,282 INFO L226 Difference]: Without dead ends: 369 [2021-05-06 08:15:49,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:15:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-06 08:15:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2021-05-06 08:15:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 228 states have (on average 1.2587719298245614) internal successors, (287), 235 states have internal predecessors, (287), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:15:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 504 transitions. [2021-05-06 08:15:49,295 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 504 transitions. Word has length 105 [2021-05-06 08:15:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:49,296 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 504 transitions. [2021-05-06 08:15:49,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:15:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 504 transitions. [2021-05-06 08:15:49,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:15:49,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:49,297 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:49,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:49,521 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1212495288, now seen corresponding path program 2 times [2021-05-06 08:15:49,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:49,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156513886] [2021-05-06 08:15:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:49,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:49,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396238492] [2021-05-06 08:15:49,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:49,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:49,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:49,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:15:49,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:50,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:50,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:50,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:50,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:50,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:50,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:50,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:50,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:50,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-05-06 08:15:50,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:50,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156513886] [2021-05-06 08:15:50,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:50,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396238492] [2021-05-06 08:15:50,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396238492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:50,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:50,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:15:50,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773932483] [2021-05-06 08:15:50,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:15:50,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:15:50,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:15:50,216 INFO L87 Difference]: Start difference. First operand 369 states and 504 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:15:50,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:50,992 INFO L93 Difference]: Finished difference Result 401 states and 555 transitions. [2021-05-06 08:15:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:15:50,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2021-05-06 08:15:50,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:50,994 INFO L225 Difference]: With dead ends: 401 [2021-05-06 08:15:50,994 INFO L226 Difference]: Without dead ends: 400 [2021-05-06 08:15:50,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:15:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-06 08:15:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2021-05-06 08:15:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 251 states have internal predecessors, (308), 123 states have call successors, (123), 32 states have call predecessors, (123), 31 states have return successors, (120), 114 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-06 08:15:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 551 transitions. [2021-05-06 08:15:51,012 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 551 transitions. Word has length 107 [2021-05-06 08:15:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:51,012 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 551 transitions. [2021-05-06 08:15:51,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:15:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 551 transitions. [2021-05-06 08:15:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 08:15:51,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:51,015 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:51,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 08:15:51,229 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1392800366, now seen corresponding path program 2 times [2021-05-06 08:15:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:51,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935046996] [2021-05-06 08:15:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:51,235 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:51,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030618341] [2021-05-06 08:15:51,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:51,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:51,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:51,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:15:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:51,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:15:51,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:51,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935046996] [2021-05-06 08:15:51,537 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:51,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030618341] [2021-05-06 08:15:51,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030618341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:51,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:51,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:15:51,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019663314] [2021-05-06 08:15:51,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:15:51,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:51,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:15:51,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:15:51,538 INFO L87 Difference]: Start difference. First operand 398 states and 551 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:15:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:51,679 INFO L93 Difference]: Finished difference Result 450 states and 598 transitions. [2021-05-06 08:15:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:15:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2021-05-06 08:15:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:51,682 INFO L225 Difference]: With dead ends: 450 [2021-05-06 08:15:51,682 INFO L226 Difference]: Without dead ends: 450 [2021-05-06 08:15:51,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:15:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-06 08:15:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 449. [2021-05-06 08:15:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 280 states have (on average 1.2357142857142858) internal successors, (346), 288 states have internal predecessors, (346), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (124), 118 states have call predecessors, (124), 124 states have call successors, (124) [2021-05-06 08:15:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 597 transitions. [2021-05-06 08:15:51,695 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 597 transitions. Word has length 110 [2021-05-06 08:15:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:51,695 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 597 transitions. [2021-05-06 08:15:51,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:15:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 597 transitions. [2021-05-06 08:15:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:15:51,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:51,697 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:51,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:51,917 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash -194014662, now seen corresponding path program 3 times [2021-05-06 08:15:51,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:51,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421924044] [2021-05-06 08:15:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:51,928 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:51,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700488783] [2021-05-06 08:15:51,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:52,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:15:52,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:52,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:15:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:52,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-06 08:15:52,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:52,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421924044] [2021-05-06 08:15:52,201 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:52,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700488783] [2021-05-06 08:15:52,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700488783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:52,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:52,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:15:52,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113767458] [2021-05-06 08:15:52,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:15:52,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:52,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:15:52,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:15:52,202 INFO L87 Difference]: Start difference. First operand 449 states and 597 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:15:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:52,447 INFO L93 Difference]: Finished difference Result 625 states and 889 transitions. [2021-05-06 08:15:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:15:52,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2021-05-06 08:15:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:52,454 INFO L225 Difference]: With dead ends: 625 [2021-05-06 08:15:52,454 INFO L226 Difference]: Without dead ends: 625 [2021-05-06 08:15:52,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:15:52,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-05-06 08:15:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 488. [2021-05-06 08:15:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 307 states have (on average 1.250814332247557) internal successors, (384), 315 states have internal predecessors, (384), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 08:15:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 659 transitions. [2021-05-06 08:15:52,473 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 659 transitions. Word has length 111 [2021-05-06 08:15:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:52,473 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 659 transitions. [2021-05-06 08:15:52,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:15:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 659 transitions. [2021-05-06 08:15:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-06 08:15:52,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:52,474 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:52,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:15:52,698 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash -793672821, now seen corresponding path program 2 times [2021-05-06 08:15:52,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:52,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791060120] [2021-05-06 08:15:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:52,705 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:52,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165104262] [2021-05-06 08:15:52,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:52,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:52,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:15:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:52,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:52,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:15:53,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:53,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791060120] [2021-05-06 08:15:53,006 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:53,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165104262] [2021-05-06 08:15:53,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165104262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:53,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:53,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:15:53,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060889946] [2021-05-06 08:15:53,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:15:53,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:53,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:15:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:15:53,007 INFO L87 Difference]: Start difference. First operand 488 states and 659 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:15:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:53,139 INFO L93 Difference]: Finished difference Result 490 states and 658 transitions. [2021-05-06 08:15:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:15:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2021-05-06 08:15:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:53,142 INFO L225 Difference]: With dead ends: 490 [2021-05-06 08:15:53,142 INFO L226 Difference]: Without dead ends: 490 [2021-05-06 08:15:53,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:15:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-06 08:15:53,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2021-05-06 08:15:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 309 states have (on average 1.2394822006472492) internal successors, (383), 317 states have internal predecessors, (383), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 08:15:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 658 transitions. [2021-05-06 08:15:53,174 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 658 transitions. Word has length 112 [2021-05-06 08:15:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:53,174 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 658 transitions. [2021-05-06 08:15:53,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:15:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 658 transitions. [2021-05-06 08:15:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:15:53,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:53,176 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:53,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:53,389 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:53,389 INFO L82 PathProgramCache]: Analyzing trace with hash 791718745, now seen corresponding path program 3 times [2021-05-06 08:15:53,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:53,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372896236] [2021-05-06 08:15:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:53,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:53,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455332735] [2021-05-06 08:15:53,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:53,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:15:53,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:53,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:15:53,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:53,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:15:53,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:53,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372896236] [2021-05-06 08:15:53,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:53,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455332735] [2021-05-06 08:15:53,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455332735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:53,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:53,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:15:53,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884644470] [2021-05-06 08:15:53,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:15:53,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:53,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:15:53,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:15:53,673 INFO L87 Difference]: Start difference. First operand 490 states and 658 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:15:53,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:53,837 INFO L93 Difference]: Finished difference Result 570 states and 733 transitions. [2021-05-06 08:15:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:15:53,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2021-05-06 08:15:53,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:53,840 INFO L225 Difference]: With dead ends: 570 [2021-05-06 08:15:53,840 INFO L226 Difference]: Without dead ends: 570 [2021-05-06 08:15:53,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:15:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-05-06 08:15:53,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2021-05-06 08:15:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 360 states have (on average 1.211111111111111) internal successors, (436), 368 states have internal predecessors, (436), 147 states have call successors, (147), 55 states have call predecessors, (147), 54 states have return successors, (143), 138 states have call predecessors, (143), 143 states have call successors, (143) [2021-05-06 08:15:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 726 transitions. [2021-05-06 08:15:53,854 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 726 transitions. Word has length 116 [2021-05-06 08:15:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:53,855 INFO L480 AbstractCegarLoop]: Abstraction has 562 states and 726 transitions. [2021-05-06 08:15:53,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:15:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 726 transitions. [2021-05-06 08:15:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 08:15:53,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:53,856 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:54,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 08:15:54,077 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1602469894, now seen corresponding path program 2 times [2021-05-06 08:15:54,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:54,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77518042] [2021-05-06 08:15:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:54,083 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:54,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610800522] [2021-05-06 08:15:54,084 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 08:15:54,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:54,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:54,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:15:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:54,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:54,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:54,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-05-06 08:15:54,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:54,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77518042] [2021-05-06 08:15:54,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:54,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610800522] [2021-05-06 08:15:54,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610800522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:54,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:54,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:15:54,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548056657] [2021-05-06 08:15:54,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:15:54,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:54,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:15:54,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:15:54,353 INFO L87 Difference]: Start difference. First operand 562 states and 726 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:15:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:54,611 INFO L93 Difference]: Finished difference Result 591 states and 766 transitions. [2021-05-06 08:15:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:15:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 118 [2021-05-06 08:15:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:54,615 INFO L225 Difference]: With dead ends: 591 [2021-05-06 08:15:54,615 INFO L226 Difference]: Without dead ends: 590 [2021-05-06 08:15:54,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:15:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-05-06 08:15:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 586. [2021-05-06 08:15:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 379 states have (on average 1.2189973614775726) internal successors, (462), 389 states have internal predecessors, (462), 151 states have call successors, (151), 56 states have call predecessors, (151), 55 states have return successors, (147), 140 states have call predecessors, (147), 147 states have call successors, (147) [2021-05-06 08:15:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2021-05-06 08:15:54,628 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 118 [2021-05-06 08:15:54,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:54,629 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2021-05-06 08:15:54,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:15:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2021-05-06 08:15:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 08:15:54,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:54,630 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:54,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:54,845 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1178507345, now seen corresponding path program 3 times [2021-05-06 08:15:54,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:54,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152075207] [2021-05-06 08:15:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:54,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:54,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498764515] [2021-05-06 08:15:54,851 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 08:15:54,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:15:54,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:15:54,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:55,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2021-05-06 08:15:55,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:55,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152075207] [2021-05-06 08:15:55,371 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:55,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498764515] [2021-05-06 08:15:55,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498764515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:55,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:55,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:15:55,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451093722] [2021-05-06 08:15:55,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:15:55,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:15:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:15:55,372 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:15:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:55,965 INFO L93 Difference]: Finished difference Result 638 states and 824 transitions. [2021-05-06 08:15:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:15:55,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 123 [2021-05-06 08:15:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:55,969 INFO L225 Difference]: With dead ends: 638 [2021-05-06 08:15:55,969 INFO L226 Difference]: Without dead ends: 638 [2021-05-06 08:15:55,969 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:15:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-05-06 08:15:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 632. [2021-05-06 08:15:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 406 states have (on average 1.2167487684729064) internal successors, (494), 417 states have internal predecessors, (494), 164 states have call successors, (164), 62 states have call predecessors, (164), 61 states have return successors, (160), 152 states have call predecessors, (160), 160 states have call successors, (160) [2021-05-06 08:15:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 818 transitions. [2021-05-06 08:15:55,983 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 818 transitions. Word has length 123 [2021-05-06 08:15:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:55,983 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 818 transitions. [2021-05-06 08:15:55,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:15:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 818 transitions. [2021-05-06 08:15:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 08:15:55,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:55,984 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:56,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:15:56,201 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:56,201 INFO L82 PathProgramCache]: Analyzing trace with hash -351372628, now seen corresponding path program 4 times [2021-05-06 08:15:56,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:56,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831527950] [2021-05-06 08:15:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:56,208 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:56,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493040739] [2021-05-06 08:15:56,209 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 08:15:56,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:15:56,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:15:56,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:56,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:56,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:57,591 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-06 08:15:57,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:57,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:57,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 71 proven. 52 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2021-05-06 08:15:57,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:57,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831527950] [2021-05-06 08:15:57,768 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:57,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493040739] [2021-05-06 08:15:57,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493040739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:57,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:57,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:15:57,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207442907] [2021-05-06 08:15:57,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:15:57,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:57,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:15:57,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:15:57,769 INFO L87 Difference]: Start difference. First operand 632 states and 818 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:15:59,846 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-06 08:16:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:00,872 INFO L93 Difference]: Finished difference Result 643 states and 827 transitions. [2021-05-06 08:16:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:16:00,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 124 [2021-05-06 08:16:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:00,875 INFO L225 Difference]: With dead ends: 643 [2021-05-06 08:16:00,875 INFO L226 Difference]: Without dead ends: 641 [2021-05-06 08:16:00,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2233.9ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:16:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-05-06 08:16:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 638. [2021-05-06 08:16:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 411 states have (on average 1.2116788321167884) internal successors, (498), 421 states have internal predecessors, (498), 164 states have call successors, (164), 64 states have call predecessors, (164), 62 states have return successors, (160), 152 states have call predecessors, (160), 160 states have call successors, (160) [2021-05-06 08:16:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 822 transitions. [2021-05-06 08:16:00,890 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 822 transitions. Word has length 124 [2021-05-06 08:16:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:00,890 INFO L480 AbstractCegarLoop]: Abstraction has 638 states and 822 transitions. [2021-05-06 08:16:00,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:16:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 822 transitions. [2021-05-06 08:16:00,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 08:16:00,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:00,891 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:01,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 08:16:01,105 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:01,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1703433466, now seen corresponding path program 5 times [2021-05-06 08:16:01,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:01,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152039493] [2021-05-06 08:16:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:01,112 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:01,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336650655] [2021-05-06 08:16:01,112 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 08:16:01,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:16:01,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:01,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-06 08:16:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:01,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 91 proven. 138 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-05-06 08:16:01,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:01,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152039493] [2021-05-06 08:16:01,842 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:01,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336650655] [2021-05-06 08:16:01,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336650655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:01,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:01,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:16:01,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871749799] [2021-05-06 08:16:01,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:16:01,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:01,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:16:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:16:01,843 INFO L87 Difference]: Start difference. First operand 638 states and 822 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:16:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:02,637 INFO L93 Difference]: Finished difference Result 648 states and 831 transitions. [2021-05-06 08:16:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:16:02,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2021-05-06 08:16:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:02,640 INFO L225 Difference]: With dead ends: 648 [2021-05-06 08:16:02,640 INFO L226 Difference]: Without dead ends: 648 [2021-05-06 08:16:02,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:16:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-05-06 08:16:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 642. [2021-05-06 08:16:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 414 states have (on average 1.210144927536232) internal successors, (501), 424 states have internal predecessors, (501), 164 states have call successors, (164), 65 states have call predecessors, (164), 63 states have return successors, (160), 152 states have call predecessors, (160), 160 states have call successors, (160) [2021-05-06 08:16:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 825 transitions. [2021-05-06 08:16:02,655 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 825 transitions. Word has length 128 [2021-05-06 08:16:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:02,655 INFO L480 AbstractCegarLoop]: Abstraction has 642 states and 825 transitions. [2021-05-06 08:16:02,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:16:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 825 transitions. [2021-05-06 08:16:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 08:16:02,656 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:02,657 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:02,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 08:16:02,877 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:02,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2058321745, now seen corresponding path program 4 times [2021-05-06 08:16:02,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:02,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524720500] [2021-05-06 08:16:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:02,886 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:02,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838359019] [2021-05-06 08:16:02,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:02,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:16:02,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 08:16:02,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:02,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:02,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 92 proven. 111 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-06 08:16:03,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:03,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524720500] [2021-05-06 08:16:03,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:03,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838359019] [2021-05-06 08:16:03,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838359019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:03,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:03,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:16:03,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514686413] [2021-05-06 08:16:03,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:16:03,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:03,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:16:03,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:16:03,521 INFO L87 Difference]: Start difference. First operand 642 states and 825 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-06 08:16:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:04,508 INFO L93 Difference]: Finished difference Result 676 states and 874 transitions. [2021-05-06 08:16:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:16:04,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 130 [2021-05-06 08:16:04,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:04,512 INFO L225 Difference]: With dead ends: 676 [2021-05-06 08:16:04,512 INFO L226 Difference]: Without dead ends: 673 [2021-05-06 08:16:04,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 375.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:16:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-05-06 08:16:04,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 669. [2021-05-06 08:16:04,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 427 states have (on average 1.2131147540983607) internal successors, (518), 438 states have internal predecessors, (518), 176 states have call successors, (176), 66 states have call predecessors, (176), 65 states have return successors, (173), 164 states have call predecessors, (173), 173 states have call successors, (173) [2021-05-06 08:16:04,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 867 transitions. [2021-05-06 08:16:04,527 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 867 transitions. Word has length 130 [2021-05-06 08:16:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:04,527 INFO L480 AbstractCegarLoop]: Abstraction has 669 states and 867 transitions. [2021-05-06 08:16:04,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-06 08:16:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 867 transitions. [2021-05-06 08:16:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-06 08:16:04,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:04,529 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:04,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 08:16:04,749 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1569660177, now seen corresponding path program 3 times [2021-05-06 08:16:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:04,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249254914] [2021-05-06 08:16:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:04,757 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:04,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270352733] [2021-05-06 08:16:04,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:04,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:16:04,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:04,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:16:04,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:04,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:04,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:05,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:05,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:05,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:05,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:05,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 08:16:05,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:05,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249254914] [2021-05-06 08:16:05,073 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:05,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270352733] [2021-05-06 08:16:05,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270352733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:05,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:05,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:16:05,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632043069] [2021-05-06 08:16:05,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:16:05,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:05,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:16:05,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:16:05,076 INFO L87 Difference]: Start difference. First operand 669 states and 867 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:16:05,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:05,236 INFO L93 Difference]: Finished difference Result 678 states and 876 transitions. [2021-05-06 08:16:05,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:16:05,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2021-05-06 08:16:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:05,243 INFO L225 Difference]: With dead ends: 678 [2021-05-06 08:16:05,243 INFO L226 Difference]: Without dead ends: 678 [2021-05-06 08:16:05,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:16:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-05-06 08:16:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 678. [2021-05-06 08:16:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 436 states have (on average 1.2087155963302751) internal successors, (527), 447 states have internal predecessors, (527), 176 states have call successors, (176), 66 states have call predecessors, (176), 65 states have return successors, (173), 164 states have call predecessors, (173), 173 states have call successors, (173) [2021-05-06 08:16:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 876 transitions. [2021-05-06 08:16:05,257 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 876 transitions. Word has length 133 [2021-05-06 08:16:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:05,257 INFO L480 AbstractCegarLoop]: Abstraction has 678 states and 876 transitions. [2021-05-06 08:16:05,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:16:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 876 transitions. [2021-05-06 08:16:05,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 08:16:05,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:05,258 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:05,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:05,473 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:05,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1381701507, now seen corresponding path program 5 times [2021-05-06 08:16:05,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:05,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318355032] [2021-05-06 08:16:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:05,482 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:05,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682267698] [2021-05-06 08:16:05,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:05,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:16:05,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:05,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:16:05,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:06,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2021-05-06 08:16:06,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:06,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318355032] [2021-05-06 08:16:06,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:06,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682267698] [2021-05-06 08:16:06,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682267698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:06,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:06,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:16:06,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879476157] [2021-05-06 08:16:06,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:16:06,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:06,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:16:06,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:16:06,427 INFO L87 Difference]: Start difference. First operand 678 states and 876 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:16:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:07,397 INFO L93 Difference]: Finished difference Result 719 states and 935 transitions. [2021-05-06 08:16:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:16:07,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 134 [2021-05-06 08:16:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:07,399 INFO L225 Difference]: With dead ends: 719 [2021-05-06 08:16:07,400 INFO L226 Difference]: Without dead ends: 718 [2021-05-06 08:16:07,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:16:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-05-06 08:16:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 711. [2021-05-06 08:16:07,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 454 states have (on average 1.2136563876651982) internal successors, (551), 466 states have internal predecessors, (551), 189 states have call successors, (189), 68 states have call predecessors, (189), 67 states have return successors, (186), 176 states have call predecessors, (186), 186 states have call successors, (186) [2021-05-06 08:16:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 926 transitions. [2021-05-06 08:16:07,414 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 926 transitions. Word has length 134 [2021-05-06 08:16:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:07,414 INFO L480 AbstractCegarLoop]: Abstraction has 711 states and 926 transitions. [2021-05-06 08:16:07,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:16:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 926 transitions. [2021-05-06 08:16:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-06 08:16:07,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:07,416 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:07,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-06 08:16:07,624 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:07,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:07,624 INFO L82 PathProgramCache]: Analyzing trace with hash 114091546, now seen corresponding path program 4 times [2021-05-06 08:16:07,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:07,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950712064] [2021-05-06 08:16:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:07,633 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:07,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043349616] [2021-05-06 08:16:07,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:07,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:16:07,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:07,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:16:07,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:07,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 444 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 08:16:07,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:07,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950712064] [2021-05-06 08:16:07,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:07,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043349616] [2021-05-06 08:16:07,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043349616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:07,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:07,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:16:07,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324087888] [2021-05-06 08:16:07,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:16:07,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:07,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:16:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:16:07,994 INFO L87 Difference]: Start difference. First operand 711 states and 926 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:16:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:08,166 INFO L93 Difference]: Finished difference Result 816 states and 1025 transitions. [2021-05-06 08:16:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:16:08,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 139 [2021-05-06 08:16:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:08,170 INFO L225 Difference]: With dead ends: 816 [2021-05-06 08:16:08,170 INFO L226 Difference]: Without dead ends: 816 [2021-05-06 08:16:08,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:16:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-05-06 08:16:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 791. [2021-05-06 08:16:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 511 states have (on average 1.187866927592955) internal successors, (607), 523 states have internal predecessors, (607), 197 states have call successors, (197), 83 states have call predecessors, (197), 82 states have return successors, (193), 184 states have call predecessors, (193), 193 states have call successors, (193) [2021-05-06 08:16:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 997 transitions. [2021-05-06 08:16:08,186 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 997 transitions. Word has length 139 [2021-05-06 08:16:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:08,187 INFO L480 AbstractCegarLoop]: Abstraction has 791 states and 997 transitions. [2021-05-06 08:16:08,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:16:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 997 transitions. [2021-05-06 08:16:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 08:16:08,188 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:08,188 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:08,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 08:16:08,405 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash -175935466, now seen corresponding path program 6 times [2021-05-06 08:16:08,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:08,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414006672] [2021-05-06 08:16:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:08,411 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:08,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781095153] [2021-05-06 08:16:08,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:08,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:16:08,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:08,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:16:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:08,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:08,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-05-06 08:16:09,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:09,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414006672] [2021-05-06 08:16:09,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:09,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781095153] [2021-05-06 08:16:09,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781095153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:09,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:09,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:16:09,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336421430] [2021-05-06 08:16:09,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:16:09,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:09,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:16:09,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:16:09,557 INFO L87 Difference]: Start difference. First operand 791 states and 997 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:16:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:10,855 INFO L93 Difference]: Finished difference Result 921 states and 1194 transitions. [2021-05-06 08:16:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:16:10,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 146 [2021-05-06 08:16:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:10,860 INFO L225 Difference]: With dead ends: 921 [2021-05-06 08:16:10,860 INFO L226 Difference]: Without dead ends: 921 [2021-05-06 08:16:10,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:16:10,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-05-06 08:16:10,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 905. [2021-05-06 08:16:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 576 states have (on average 1.2135416666666667) internal successors, (699), 592 states have internal predecessors, (699), 241 states have call successors, (241), 88 states have call predecessors, (241), 87 states have return successors, (237), 224 states have call predecessors, (237), 237 states have call successors, (237) [2021-05-06 08:16:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1177 transitions. [2021-05-06 08:16:10,880 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1177 transitions. Word has length 146 [2021-05-06 08:16:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:10,881 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 1177 transitions. [2021-05-06 08:16:10,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:16:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1177 transitions. [2021-05-06 08:16:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-06 08:16:10,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:10,882 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:11,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 08:16:11,091 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:11,091 INFO L82 PathProgramCache]: Analyzing trace with hash 663584549, now seen corresponding path program 7 times [2021-05-06 08:16:11,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:11,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974006916] [2021-05-06 08:16:11,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:11,096 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:11,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572038409] [2021-05-06 08:16:11,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:11,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:16:11,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:11,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:11,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:11,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-05-06 08:16:11,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:11,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974006916] [2021-05-06 08:16:11,790 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:11,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572038409] [2021-05-06 08:16:11,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572038409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:11,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:11,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:16:11,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509081143] [2021-05-06 08:16:11,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:16:11,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:11,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:16:11,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:16:11,791 INFO L87 Difference]: Start difference. First operand 905 states and 1177 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:16:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:12,560 INFO L93 Difference]: Finished difference Result 916 states and 1186 transitions. [2021-05-06 08:16:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:16:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 147 [2021-05-06 08:16:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:12,564 INFO L225 Difference]: With dead ends: 916 [2021-05-06 08:16:12,564 INFO L226 Difference]: Without dead ends: 914 [2021-05-06 08:16:12,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:16:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-05-06 08:16:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 911. [2021-05-06 08:16:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 581 states have (on average 1.2099827882960412) internal successors, (703), 596 states have internal predecessors, (703), 241 states have call successors, (241), 90 states have call predecessors, (241), 88 states have return successors, (237), 224 states have call predecessors, (237), 237 states have call successors, (237) [2021-05-06 08:16:12,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1181 transitions. [2021-05-06 08:16:12,582 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1181 transitions. Word has length 147 [2021-05-06 08:16:12,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:12,582 INFO L480 AbstractCegarLoop]: Abstraction has 911 states and 1181 transitions. [2021-05-06 08:16:12,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:16:12,582 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1181 transitions. [2021-05-06 08:16:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 08:16:12,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:12,584 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:12,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 08:16:12,803 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash 286780695, now seen corresponding path program 8 times [2021-05-06 08:16:12,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:12,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762389280] [2021-05-06 08:16:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:12,808 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:12,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795171057] [2021-05-06 08:16:12,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:13,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:16:13,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:13,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 08:16:13,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:13,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-05-06 08:16:13,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:13,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762389280] [2021-05-06 08:16:13,657 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:13,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795171057] [2021-05-06 08:16:13,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795171057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:13,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:13,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:16:13,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685059537] [2021-05-06 08:16:13,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:16:13,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:13,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:16:13,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:16:13,659 INFO L87 Difference]: Start difference. First operand 911 states and 1181 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:16:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:14,654 INFO L93 Difference]: Finished difference Result 921 states and 1190 transitions. [2021-05-06 08:16:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:16:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 151 [2021-05-06 08:16:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:14,658 INFO L225 Difference]: With dead ends: 921 [2021-05-06 08:16:14,658 INFO L226 Difference]: Without dead ends: 921 [2021-05-06 08:16:14,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:16:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-05-06 08:16:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 915. [2021-05-06 08:16:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 584 states have (on average 1.2089041095890412) internal successors, (706), 599 states have internal predecessors, (706), 241 states have call successors, (241), 91 states have call predecessors, (241), 89 states have return successors, (237), 224 states have call predecessors, (237), 237 states have call successors, (237) [2021-05-06 08:16:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1184 transitions. [2021-05-06 08:16:14,723 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1184 transitions. Word has length 151 [2021-05-06 08:16:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:14,724 INFO L480 AbstractCegarLoop]: Abstraction has 915 states and 1184 transitions. [2021-05-06 08:16:14,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:16:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1184 transitions. [2021-05-06 08:16:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 08:16:14,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:14,726 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:14,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:14,927 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:14,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:14,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1987152653, now seen corresponding path program 9 times [2021-05-06 08:16:14,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:14,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440287247] [2021-05-06 08:16:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:14,960 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:14,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005214655] [2021-05-06 08:16:14,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:15,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:16:15,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 08:16:15,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:15,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:15,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:16,029 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-06 08:16:16,952 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 08:16:17,816 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-06 08:16:17,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:17,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:18,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:18,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:18,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:18,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:18,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:18,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:18,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 132 proven. 77 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-06 08:16:18,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:18,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440287247] [2021-05-06 08:16:18,669 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:18,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005214655] [2021-05-06 08:16:18,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005214655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:18,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:18,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:16:18,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93143370] [2021-05-06 08:16:18,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:16:18,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:18,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:16:18,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:16:18,670 INFO L87 Difference]: Start difference. First operand 915 states and 1184 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-06 08:16:20,130 WARN L205 SmtUtils]: Spent 927.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-06 08:16:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:23,774 INFO L93 Difference]: Finished difference Result 976 states and 1260 transitions. [2021-05-06 08:16:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:16:23,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 151 [2021-05-06 08:16:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:23,809 INFO L225 Difference]: With dead ends: 976 [2021-05-06 08:16:23,809 INFO L226 Difference]: Without dead ends: 976 [2021-05-06 08:16:23,809 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 3463.6ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:16:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-06 08:16:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 963. [2021-05-06 08:16:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 614 states have (on average 1.210097719869707) internal successors, (743), 630 states have internal predecessors, (743), 254 states have call successors, (254), 96 states have call predecessors, (254), 94 states have return successors, (250), 236 states have call predecessors, (250), 250 states have call successors, (250) [2021-05-06 08:16:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1247 transitions. [2021-05-06 08:16:23,838 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1247 transitions. Word has length 151 [2021-05-06 08:16:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:23,839 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 1247 transitions. [2021-05-06 08:16:23,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-06 08:16:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1247 transitions. [2021-05-06 08:16:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-06 08:16:23,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:23,840 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:24,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 08:16:24,049 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:24,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1068595608, now seen corresponding path program 6 times [2021-05-06 08:16:24,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:24,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097143352] [2021-05-06 08:16:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:24,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:24,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964574755] [2021-05-06 08:16:24,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:24,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:16:24,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:24,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:16:24,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:24,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:24,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:24,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 87 proven. 29 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2021-05-06 08:16:24,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097143352] [2021-05-06 08:16:24,564 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964574755] [2021-05-06 08:16:24,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964574755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:24,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:24,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:16:24,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103312570] [2021-05-06 08:16:24,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:16:24,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:16:24,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:16:24,565 INFO L87 Difference]: Start difference. First operand 963 states and 1247 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 08:16:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:24,835 INFO L93 Difference]: Finished difference Result 988 states and 1267 transitions. [2021-05-06 08:16:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:16:24,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 153 [2021-05-06 08:16:24,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:24,839 INFO L225 Difference]: With dead ends: 988 [2021-05-06 08:16:24,839 INFO L226 Difference]: Without dead ends: 984 [2021-05-06 08:16:24,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:16:24,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-05-06 08:16:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 976. [2021-05-06 08:16:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 624 states have (on average 1.2019230769230769) internal successors, (750), 640 states have internal predecessors, (750), 253 states have call successors, (253), 99 states have call predecessors, (253), 98 states have return successors, (250), 236 states have call predecessors, (250), 250 states have call successors, (250) [2021-05-06 08:16:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1253 transitions. [2021-05-06 08:16:24,859 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1253 transitions. Word has length 153 [2021-05-06 08:16:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:24,860 INFO L480 AbstractCegarLoop]: Abstraction has 976 states and 1253 transitions. [2021-05-06 08:16:24,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 08:16:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1253 transitions. [2021-05-06 08:16:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 08:16:24,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:24,862 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:25,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:25,062 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:25,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1784468722, now seen corresponding path program 4 times [2021-05-06 08:16:25,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:25,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815447431] [2021-05-06 08:16:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:25,068 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:25,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094971283] [2021-05-06 08:16:25,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:25,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:16:25,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:25,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:16:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:25,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 718 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:16:25,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:25,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815447431] [2021-05-06 08:16:25,855 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:25,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094971283] [2021-05-06 08:16:25,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094971283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:25,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:25,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:16:25,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125425561] [2021-05-06 08:16:25,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:16:25,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:25,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:16:25,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:16:25,867 INFO L87 Difference]: Start difference. First operand 976 states and 1253 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:16:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:26,177 INFO L93 Difference]: Finished difference Result 988 states and 1265 transitions. [2021-05-06 08:16:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:16:26,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 156 [2021-05-06 08:16:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:26,182 INFO L225 Difference]: With dead ends: 988 [2021-05-06 08:16:26,183 INFO L226 Difference]: Without dead ends: 988 [2021-05-06 08:16:26,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:16:26,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-05-06 08:16:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 988. [2021-05-06 08:16:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 636 states have (on average 1.1981132075471699) internal successors, (762), 652 states have internal predecessors, (762), 253 states have call successors, (253), 99 states have call predecessors, (253), 98 states have return successors, (250), 236 states have call predecessors, (250), 250 states have call successors, (250) [2021-05-06 08:16:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1265 transitions. [2021-05-06 08:16:26,233 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1265 transitions. Word has length 156 [2021-05-06 08:16:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:26,235 INFO L480 AbstractCegarLoop]: Abstraction has 988 states and 1265 transitions. [2021-05-06 08:16:26,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:16:26,235 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1265 transitions. [2021-05-06 08:16:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 08:16:26,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:26,237 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:26,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:26,441 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:26,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:26,441 INFO L82 PathProgramCache]: Analyzing trace with hash -482920742, now seen corresponding path program 7 times [2021-05-06 08:16:26,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:26,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657524468] [2021-05-06 08:16:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:26,459 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:26,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345445936] [2021-05-06 08:16:26,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:26,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:16:26,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:26,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:26,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:27,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:28,538 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-06 08:16:28,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:28,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:28,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:28,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:29,188 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-05-06 08:16:33,384 WARN L205 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-05-06 08:16:35,325 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-06 08:16:35,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:35,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:35,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:35,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 228 proven. 93 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-05-06 08:16:35,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:35,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657524468] [2021-05-06 08:16:35,797 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:35,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345445936] [2021-05-06 08:16:35,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345445936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:35,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:35,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 08:16:35,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932722437] [2021-05-06 08:16:35,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 08:16:35,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:35,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 08:16:35,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:16:35,798 INFO L87 Difference]: Start difference. First operand 988 states and 1265 transitions. Second operand has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-06 08:16:53,250 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-06 08:16:54,654 WARN L205 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-06 08:16:56,688 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-05-06 08:16:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:59,458 INFO L93 Difference]: Finished difference Result 1029 states and 1324 transitions. [2021-05-06 08:16:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:16:59,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) Word has length 157 [2021-05-06 08:16:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:59,462 INFO L225 Difference]: With dead ends: 1029 [2021-05-06 08:16:59,462 INFO L226 Difference]: Without dead ends: 1028 [2021-05-06 08:16:59,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 12939.1ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:16:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-05-06 08:16:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1021. [2021-05-06 08:16:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 654 states have (on average 1.201834862385321) internal successors, (786), 671 states have internal predecessors, (786), 266 states have call successors, (266), 101 states have call predecessors, (266), 100 states have return successors, (263), 248 states have call predecessors, (263), 263 states have call successors, (263) [2021-05-06 08:16:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1315 transitions. [2021-05-06 08:16:59,479 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1315 transitions. Word has length 157 [2021-05-06 08:16:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:59,479 INFO L480 AbstractCegarLoop]: Abstraction has 1021 states and 1315 transitions. [2021-05-06 08:16:59,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-06 08:16:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1315 transitions. [2021-05-06 08:16:59,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 08:16:59,481 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:59,481 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:59,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-06 08:16:59,706 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1975031370, now seen corresponding path program 8 times [2021-05-06 08:16:59,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:59,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620875483] [2021-05-06 08:16:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:59,711 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:59,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508436968] [2021-05-06 08:16:59,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:59,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:16:59,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:59,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 102 conjunts are in the unsatisfiable core [2021-05-06 08:16:59,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:00,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 222 proven. 171 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2021-05-06 08:17:00,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:00,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620875483] [2021-05-06 08:17:00,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:00,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508436968] [2021-05-06 08:17:00,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508436968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:00,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:00,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:17:00,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647514062] [2021-05-06 08:17:00,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:17:00,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:00,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:17:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:17:00,586 INFO L87 Difference]: Start difference. First operand 1021 states and 1315 transitions. Second operand has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:17:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:01,602 INFO L93 Difference]: Finished difference Result 1093 states and 1405 transitions. [2021-05-06 08:17:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:17:01,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) Word has length 157 [2021-05-06 08:17:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:01,608 INFO L225 Difference]: With dead ends: 1093 [2021-05-06 08:17:01,608 INFO L226 Difference]: Without dead ends: 1092 [2021-05-06 08:17:01,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 602.6ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:17:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-05-06 08:17:01,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1055. [2021-05-06 08:17:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 678 states have (on average 1.1991150442477876) internal successors, (813), 695 states have internal predecessors, (813), 270 states have call successors, (270), 107 states have call predecessors, (270), 106 states have return successors, (267), 252 states have call predecessors, (267), 267 states have call successors, (267) [2021-05-06 08:17:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1350 transitions. [2021-05-06 08:17:01,624 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1350 transitions. Word has length 157 [2021-05-06 08:17:01,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:01,625 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 1350 transitions. [2021-05-06 08:17:01,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:17:01,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1350 transitions. [2021-05-06 08:17:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 08:17:01,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:01,627 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:01,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:01,841 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:01,841 INFO L82 PathProgramCache]: Analyzing trace with hash 827981760, now seen corresponding path program 5 times [2021-05-06 08:17:01,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:01,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476355722] [2021-05-06 08:17:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:01,847 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:01,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084814697] [2021-05-06 08:17:01,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:02,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:17:02,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:02,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:17:02,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:02,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 40 proven. 728 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:17:02,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:02,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476355722] [2021-05-06 08:17:02,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:02,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084814697] [2021-05-06 08:17:02,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084814697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:02,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:02,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:02,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180977152] [2021-05-06 08:17:02,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:02,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:02,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:02,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:02,436 INFO L87 Difference]: Start difference. First operand 1055 states and 1350 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:17:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:02,674 INFO L93 Difference]: Finished difference Result 1219 states and 1514 transitions. [2021-05-06 08:17:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:17:02,677 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 160 [2021-05-06 08:17:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:02,681 INFO L225 Difference]: With dead ends: 1219 [2021-05-06 08:17:02,681 INFO L226 Difference]: Without dead ends: 1219 [2021-05-06 08:17:02,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:17:02,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-05-06 08:17:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1184. [2021-05-06 08:17:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 763 states have (on average 1.18086500655308) internal successors, (901), 781 states have internal predecessors, (901), 289 states have call successors, (289), 132 states have call predecessors, (289), 131 states have return successors, (286), 270 states have call predecessors, (286), 286 states have call successors, (286) [2021-05-06 08:17:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1476 transitions. [2021-05-06 08:17:02,698 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1476 transitions. Word has length 160 [2021-05-06 08:17:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:02,698 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 1476 transitions. [2021-05-06 08:17:02,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:17:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1476 transitions. [2021-05-06 08:17:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-06 08:17:02,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:02,700 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:02,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-06 08:17:02,907 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1220795847, now seen corresponding path program 5 times [2021-05-06 08:17:02,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:02,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091143234] [2021-05-06 08:17:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:02,916 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:02,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131459482] [2021-05-06 08:17:02,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:03,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:17:03,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:03,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:17:03,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:03,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 48 proven. 730 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:17:03,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:03,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091143234] [2021-05-06 08:17:03,485 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:03,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131459482] [2021-05-06 08:17:03,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131459482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:03,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:03,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:03,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330360394] [2021-05-06 08:17:03,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:03,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:03,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:03,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:03,486 INFO L87 Difference]: Start difference. First operand 1184 states and 1476 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:17:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:03,733 INFO L93 Difference]: Finished difference Result 1212 states and 1498 transitions. [2021-05-06 08:17:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:17:03,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 162 [2021-05-06 08:17:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:03,737 INFO L225 Difference]: With dead ends: 1212 [2021-05-06 08:17:03,738 INFO L226 Difference]: Without dead ends: 1212 [2021-05-06 08:17:03,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:17:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-05-06 08:17:03,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1204. [2021-05-06 08:17:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 783 states have (on average 1.169859514687101) internal successors, (916), 799 states have internal predecessors, (916), 289 states have call successors, (289), 132 states have call predecessors, (289), 131 states have return successors, (286), 272 states have call predecessors, (286), 286 states have call successors, (286) [2021-05-06 08:17:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1491 transitions. [2021-05-06 08:17:03,755 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1491 transitions. Word has length 162 [2021-05-06 08:17:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:03,755 INFO L480 AbstractCegarLoop]: Abstraction has 1204 states and 1491 transitions. [2021-05-06 08:17:03,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:17:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1491 transitions. [2021-05-06 08:17:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-06 08:17:03,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:03,757 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:03,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:03,965 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:03,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:03,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2094023431, now seen corresponding path program 6 times [2021-05-06 08:17:03,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:03,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534543570] [2021-05-06 08:17:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:03,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:03,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807912978] [2021-05-06 08:17:03,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:05,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-06 08:17:05,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:17:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:05,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 51 proven. 741 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:17:05,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:05,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534543570] [2021-05-06 08:17:05,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:05,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807912978] [2021-05-06 08:17:05,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807912978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:05,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:05,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:17:05,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381211533] [2021-05-06 08:17:05,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:17:05,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:17:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:17:05,339 INFO L87 Difference]: Start difference. First operand 1204 states and 1491 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:17:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:05,786 INFO L93 Difference]: Finished difference Result 1412 states and 1711 transitions. [2021-05-06 08:17:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:17:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 166 [2021-05-06 08:17:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:05,817 INFO L225 Difference]: With dead ends: 1412 [2021-05-06 08:17:05,818 INFO L226 Difference]: Without dead ends: 1412 [2021-05-06 08:17:05,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:17:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2021-05-06 08:17:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1390. [2021-05-06 08:17:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 904 states have (on average 1.154867256637168) internal successors, (1044), 920 states have internal predecessors, (1044), 325 states have call successors, (325), 161 states have call predecessors, (325), 160 states have return successors, (321), 308 states have call predecessors, (321), 321 states have call successors, (321) [2021-05-06 08:17:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1690 transitions. [2021-05-06 08:17:05,854 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1690 transitions. Word has length 166 [2021-05-06 08:17:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:05,854 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 1690 transitions. [2021-05-06 08:17:05,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:17:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1690 transitions. [2021-05-06 08:17:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-06 08:17:05,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:05,870 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:06,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-06 08:17:06,093 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:06,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1864794764, now seen corresponding path program 10 times [2021-05-06 08:17:06,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:06,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896609540] [2021-05-06 08:17:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:06,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:06,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198930035] [2021-05-06 08:17:06,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:06,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:06,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:06,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:17:06,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:06,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:06,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 166 proven. 298 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2021-05-06 08:17:07,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:07,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896609540] [2021-05-06 08:17:07,495 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:07,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198930035] [2021-05-06 08:17:07,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198930035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:07,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:07,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:17:07,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619301020] [2021-05-06 08:17:07,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:17:07,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:07,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:17:07,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:07,497 INFO L87 Difference]: Start difference. First operand 1390 states and 1690 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:17:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:09,085 INFO L93 Difference]: Finished difference Result 1413 states and 1716 transitions. [2021-05-06 08:17:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:17:09,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) Word has length 170 [2021-05-06 08:17:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:09,094 INFO L225 Difference]: With dead ends: 1413 [2021-05-06 08:17:09,094 INFO L226 Difference]: Without dead ends: 1413 [2021-05-06 08:17:09,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 799.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:17:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-05-06 08:17:09,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1395. [2021-05-06 08:17:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 907 states have (on average 1.153252480705623) internal successors, (1046), 924 states have internal predecessors, (1046), 326 states have call successors, (326), 162 states have call predecessors, (326), 161 states have return successors, (322), 308 states have call predecessors, (322), 322 states have call successors, (322) [2021-05-06 08:17:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 1694 transitions. [2021-05-06 08:17:09,155 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 1694 transitions. Word has length 170 [2021-05-06 08:17:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:09,156 INFO L480 AbstractCegarLoop]: Abstraction has 1395 states and 1694 transitions. [2021-05-06 08:17:09,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:17:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 1694 transitions. [2021-05-06 08:17:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-06 08:17:09,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:09,158 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:09,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-06 08:17:09,377 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:09,377 INFO L82 PathProgramCache]: Analyzing trace with hash 398880833, now seen corresponding path program 11 times [2021-05-06 08:17:09,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:09,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289894147] [2021-05-06 08:17:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:09,382 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:09,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296295243] [2021-05-06 08:17:09,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:09,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:17:09,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:09,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-06 08:17:09,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:10,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:10,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,126 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-06 08:17:11,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-05-06 08:17:11,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:11,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289894147] [2021-05-06 08:17:11,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:11,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296295243] [2021-05-06 08:17:11,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296295243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:11,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:11,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:17:11,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616728757] [2021-05-06 08:17:11,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:17:11,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:11,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:17:11,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:11,428 INFO L87 Difference]: Start difference. First operand 1395 states and 1694 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2021-05-06 08:17:12,445 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-06 08:17:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:13,521 INFO L93 Difference]: Finished difference Result 1449 states and 1761 transitions. [2021-05-06 08:17:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:17:13,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 173 [2021-05-06 08:17:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:13,535 INFO L225 Difference]: With dead ends: 1449 [2021-05-06 08:17:13,535 INFO L226 Difference]: Without dead ends: 1449 [2021-05-06 08:17:13,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1660.9ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:17:13,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-05-06 08:17:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1383. [2021-05-06 08:17:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 900 states have (on average 1.1522222222222223) internal successors, (1037), 918 states have internal predecessors, (1037), 323 states have call successors, (323), 160 states have call predecessors, (323), 159 states have return successors, (319), 304 states have call predecessors, (319), 319 states have call successors, (319) [2021-05-06 08:17:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1679 transitions. [2021-05-06 08:17:13,558 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1679 transitions. Word has length 173 [2021-05-06 08:17:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:13,559 INFO L480 AbstractCegarLoop]: Abstraction has 1383 states and 1679 transitions. [2021-05-06 08:17:13,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2021-05-06 08:17:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1679 transitions. [2021-05-06 08:17:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-06 08:17:13,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:13,562 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:13,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-06 08:17:13,771 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:13,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:13,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1303020634, now seen corresponding path program 12 times [2021-05-06 08:17:13,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:13,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051903927] [2021-05-06 08:17:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:13,776 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:13,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131656104] [2021-05-06 08:17:13,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:14,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:17:14,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:14,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:17:14,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:14,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,178 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-06 08:17:16,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 132 proven. 69 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2021-05-06 08:17:16,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:16,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051903927] [2021-05-06 08:17:16,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:16,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131656104] [2021-05-06 08:17:16,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131656104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:16,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:16,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:17:16,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340428736] [2021-05-06 08:17:16,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:17:16,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:16,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:17:16,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:17:16,261 INFO L87 Difference]: Start difference. First operand 1383 states and 1679 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-06 08:17:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:17,590 INFO L93 Difference]: Finished difference Result 1498 states and 1835 transitions. [2021-05-06 08:17:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:17:17,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 174 [2021-05-06 08:17:17,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:17,596 INFO L225 Difference]: With dead ends: 1498 [2021-05-06 08:17:17,596 INFO L226 Difference]: Without dead ends: 1498 [2021-05-06 08:17:17,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1074.8ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:17:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-05-06 08:17:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1442. [2021-05-06 08:17:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 939 states have (on average 1.1554845580404687) internal successors, (1085), 958 states have internal predecessors, (1085), 340 states have call successors, (340), 163 states have call predecessors, (340), 162 states have return successors, (336), 320 states have call predecessors, (336), 336 states have call successors, (336) [2021-05-06 08:17:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1761 transitions. [2021-05-06 08:17:17,622 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1761 transitions. Word has length 174 [2021-05-06 08:17:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:17,622 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 1761 transitions. [2021-05-06 08:17:17,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-06 08:17:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1761 transitions. [2021-05-06 08:17:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-06 08:17:17,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:17,625 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:17,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:17,834 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash 337831166, now seen corresponding path program 13 times [2021-05-06 08:17:17,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:17,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689171209] [2021-05-06 08:17:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:17,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:17,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920874587] [2021-05-06 08:17:17,839 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:18,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:17:18,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:19,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:19,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:20,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:20,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:20,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 211 proven. 125 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2021-05-06 08:17:20,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:20,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689171209] [2021-05-06 08:17:20,090 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:20,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920874587] [2021-05-06 08:17:20,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920874587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:20,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:20,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:17:20,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889978205] [2021-05-06 08:17:20,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:17:20,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:20,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:17:20,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:17:20,091 INFO L87 Difference]: Start difference. First operand 1442 states and 1761 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2021-05-06 08:17:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:23,005 INFO L93 Difference]: Finished difference Result 1516 states and 1848 transitions. [2021-05-06 08:17:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:17:23,006 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 174 [2021-05-06 08:17:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:23,009 INFO L225 Difference]: With dead ends: 1516 [2021-05-06 08:17:23,009 INFO L226 Difference]: Without dead ends: 1516 [2021-05-06 08:17:23,010 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1054.7ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:17:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-05-06 08:17:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1473. [2021-05-06 08:17:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 957 states have (on average 1.1567398119122256) internal successors, (1107), 977 states have internal predecessors, (1107), 349 states have call successors, (349), 167 states have call predecessors, (349), 166 states have return successors, (345), 328 states have call predecessors, (345), 345 states have call successors, (345) [2021-05-06 08:17:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 1801 transitions. [2021-05-06 08:17:23,048 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 1801 transitions. Word has length 174 [2021-05-06 08:17:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:23,050 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 1801 transitions. [2021-05-06 08:17:23,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2021-05-06 08:17:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 1801 transitions. [2021-05-06 08:17:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-06 08:17:23,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:23,052 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:23,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:23,261 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1567893592, now seen corresponding path program 14 times [2021-05-06 08:17:23,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:23,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225771254] [2021-05-06 08:17:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:23,281 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:23,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564037373] [2021-05-06 08:17:23,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:23,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:23,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 128 conjunts are in the unsatisfiable core [2021-05-06 08:17:23,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:24,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 277 proven. 268 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2021-05-06 08:17:24,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:24,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225771254] [2021-05-06 08:17:24,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:24,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564037373] [2021-05-06 08:17:24,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564037373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:24,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:24,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:17:24,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069497690] [2021-05-06 08:17:24,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:17:24,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:24,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:17:24,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:17:24,603 INFO L87 Difference]: Start difference. First operand 1473 states and 1801 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:17:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:26,164 INFO L93 Difference]: Finished difference Result 1521 states and 1852 transitions. [2021-05-06 08:17:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:17:26,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 178 [2021-05-06 08:17:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:26,170 INFO L225 Difference]: With dead ends: 1521 [2021-05-06 08:17:26,170 INFO L226 Difference]: Without dead ends: 1521 [2021-05-06 08:17:26,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 990.5ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:17:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-05-06 08:17:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1450. [2021-05-06 08:17:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 945 states have (on average 1.1534391534391535) internal successors, (1090), 965 states have internal predecessors, (1090), 339 states have call successors, (339), 166 states have call predecessors, (339), 165 states have return successors, (335), 318 states have call predecessors, (335), 335 states have call successors, (335) [2021-05-06 08:17:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 1764 transitions. [2021-05-06 08:17:26,215 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 1764 transitions. Word has length 178 [2021-05-06 08:17:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:26,215 INFO L480 AbstractCegarLoop]: Abstraction has 1450 states and 1764 transitions. [2021-05-06 08:17:26,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:17:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 1764 transitions. [2021-05-06 08:17:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 08:17:26,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:26,220 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:26,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-06 08:17:26,435 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:26,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1887563811, now seen corresponding path program 9 times [2021-05-06 08:17:26,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:26,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942170449] [2021-05-06 08:17:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:26,441 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:26,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990614512] [2021-05-06 08:17:26,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:27,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:17:27,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 08:17:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:27,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 119 proven. 71 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2021-05-06 08:17:27,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:27,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942170449] [2021-05-06 08:17:27,815 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:27,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990614512] [2021-05-06 08:17:27,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990614512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:27,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:27,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:17:27,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277189134] [2021-05-06 08:17:27,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:17:27,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:27,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:17:27,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:17:27,816 INFO L87 Difference]: Start difference. First operand 1450 states and 1764 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:17:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:28,755 INFO L93 Difference]: Finished difference Result 1523 states and 1854 transitions. [2021-05-06 08:17:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:17:28,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 180 [2021-05-06 08:17:28,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:28,760 INFO L225 Difference]: With dead ends: 1523 [2021-05-06 08:17:28,760 INFO L226 Difference]: Without dead ends: 1517 [2021-05-06 08:17:28,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:17:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-05-06 08:17:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1443. [2021-05-06 08:17:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 941 states have (on average 1.1519659936238045) internal successors, (1084), 958 states have internal predecessors, (1084), 334 states have call successors, (334), 168 states have call predecessors, (334), 167 states have return successors, (330), 316 states have call predecessors, (330), 330 states have call successors, (330) [2021-05-06 08:17:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1748 transitions. [2021-05-06 08:17:28,813 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1748 transitions. Word has length 180 [2021-05-06 08:17:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:28,814 INFO L480 AbstractCegarLoop]: Abstraction has 1443 states and 1748 transitions. [2021-05-06 08:17:28,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:17:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1748 transitions. [2021-05-06 08:17:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 08:17:28,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:28,816 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:29,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-06 08:17:29,025 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:29,025 INFO L82 PathProgramCache]: Analyzing trace with hash -710122111, now seen corresponding path program 10 times [2021-05-06 08:17:29,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:29,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233778987] [2021-05-06 08:17:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:29,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:29,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977358244] [2021-05-06 08:17:29,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:29,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:29,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-06 08:17:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:29,919 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 08:17:30,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:30,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:30,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 294 proven. 193 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-05-06 08:17:30,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:30,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233778987] [2021-05-06 08:17:30,532 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:30,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977358244] [2021-05-06 08:17:30,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977358244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:30,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:30,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:17:30,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578272295] [2021-05-06 08:17:30,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:17:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:30,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:17:30,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:30,533 INFO L87 Difference]: Start difference. First operand 1443 states and 1748 transitions. Second operand has 18 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2021-05-06 08:17:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:32,229 INFO L93 Difference]: Finished difference Result 1530 states and 1856 transitions. [2021-05-06 08:17:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:17:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 180 [2021-05-06 08:17:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:32,234 INFO L225 Difference]: With dead ends: 1530 [2021-05-06 08:17:32,234 INFO L226 Difference]: Without dead ends: 1525 [2021-05-06 08:17:32,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1006.4ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:17:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-05-06 08:17:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1479. [2021-05-06 08:17:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 962 states have (on average 1.1538461538461537) internal successors, (1110), 980 states have internal predecessors, (1110), 347 states have call successors, (347), 170 states have call predecessors, (347), 169 states have return successors, (343), 328 states have call predecessors, (343), 343 states have call successors, (343) [2021-05-06 08:17:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 1800 transitions. [2021-05-06 08:17:32,254 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 1800 transitions. Word has length 180 [2021-05-06 08:17:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:32,255 INFO L480 AbstractCegarLoop]: Abstraction has 1479 states and 1800 transitions. [2021-05-06 08:17:32,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2021-05-06 08:17:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 1800 transitions. [2021-05-06 08:17:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 08:17:32,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:32,257 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:32,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:32,482 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:32,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2092734557, now seen corresponding path program 11 times [2021-05-06 08:17:32,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:32,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581586510] [2021-05-06 08:17:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:32,487 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:32,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472631556] [2021-05-06 08:17:32,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:32,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:17:32,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:17:32,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:32,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:32,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:32,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:32,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:32,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:32,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 180 proven. 307 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-05-06 08:17:33,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:33,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581586510] [2021-05-06 08:17:33,431 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:33,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472631556] [2021-05-06 08:17:33,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472631556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:33,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:33,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:17:33,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925767461] [2021-05-06 08:17:33,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:17:33,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:33,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:17:33,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:33,449 INFO L87 Difference]: Start difference. First operand 1479 states and 1800 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) [2021-05-06 08:17:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:36,205 INFO L93 Difference]: Finished difference Result 1504 states and 1836 transitions. [2021-05-06 08:17:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:17:36,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) Word has length 180 [2021-05-06 08:17:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:36,207 INFO L225 Difference]: With dead ends: 1504 [2021-05-06 08:17:36,207 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:17:36,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 504.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:17:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:17:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:17:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:17:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:17:36,207 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 180 [2021-05-06 08:17:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:36,207 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:17:36,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) [2021-05-06 08:17:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:17:36,208 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:17:36,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-06 08:17:36,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:17:36 BasicIcfg [2021-05-06 08:17:36,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:17:36,413 INFO L168 Benchmark]: Toolchain (without parser) took 128139.25 ms. Allocated memory was 170.9 MB in the beginning and 440.4 MB in the end (delta: 269.5 MB). Free memory was 135.4 MB in the beginning and 392.8 MB in the end (delta: -257.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:17:36,413 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 170.9 MB. Free memory is still 153.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:17:36,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.79 ms. Allocated memory is still 170.9 MB. Free memory was 135.2 MB in the beginning and 154.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:17:36,413 INFO L168 Benchmark]: Boogie Preprocessor took 39.88 ms. Allocated memory is still 170.9 MB. Free memory was 153.9 MB in the beginning and 152.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:17:36,413 INFO L168 Benchmark]: RCFGBuilder took 407.47 ms. Allocated memory is still 170.9 MB. Free memory was 152.3 MB in the beginning and 135.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:17:36,413 INFO L168 Benchmark]: IcfgTransformer took 30.96 ms. Allocated memory is still 170.9 MB. Free memory was 134.9 MB in the beginning and 133.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:17:36,413 INFO L168 Benchmark]: TraceAbstraction took 127398.54 ms. Allocated memory was 170.9 MB in the beginning and 440.4 MB in the end (delta: 269.5 MB). Free memory was 133.2 MB in the beginning and 392.8 MB in the end (delta: -259.6 MB). Peak memory consumption was 11.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:17:36,414 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 170.9 MB. Free memory is still 153.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.79 ms. Allocated memory is still 170.9 MB. Free memory was 135.2 MB in the beginning and 154.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.88 ms. Allocated memory is still 170.9 MB. Free memory was 153.9 MB in the beginning and 152.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 407.47 ms. Allocated memory is still 170.9 MB. Free memory was 152.3 MB in the beginning and 135.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 30.96 ms. Allocated memory is still 170.9 MB. Free memory was 134.9 MB in the beginning and 133.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 127398.54 ms. Allocated memory was 170.9 MB in the beginning and 440.4 MB in the end (delta: 269.5 MB). Free memory was 133.2 MB in the beginning and 392.8 MB in the end (delta: -259.6 MB). Peak memory consumption was 11.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 127334.6ms, OverallIterations: 56, TraceHistogramMax: 25, EmptinessCheckTime: 140.2ms, AutomataDifference: 62112.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3231 SDtfs, 2399 SDslu, 19188 SDs, 0 SdLazy, 18516 SolverSat, 2147 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46603.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6470 GetRequests, 5658 SyntacticMatches, 35 SemanticMatches, 777 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 32933.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1479occurred in iteration=55, InterpolantAutomatonStates: 696, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1044.6ms AutomataMinimizationTime, 56 MinimizatonAttempts, 903 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 959.8ms SsaConstructionTime, 8214.0ms SatisfiabilityAnalysisTime, 39137.2ms InterpolantComputationTime, 6263 NumberOfCodeBlocks, 5652 NumberOfCodeBlocksAsserted, 147 NumberOfCheckSat, 6207 ConstructedInterpolants, 0 QuantifiedInterpolants, 42982 SizeOfPredicates, 451 NumberOfNonLiveVariables, 17581 ConjunctsInSsa, 2063 ConjunctsInUnsatCore, 56 InterpolantComputations, 4 PerfectInterpolantSequences, 20389/27799 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...