/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/egcd-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:11:56,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:11:56,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:11:56,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:11:56,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:11:56,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:11:56,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:11:56,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:11:56,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:11:56,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:11:56,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:11:56,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:11:56,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:11:56,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:11:56,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:11:56,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:11:56,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:11:56,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:11:56,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:11:56,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:11:56,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:11:56,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:11:56,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:11:56,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:11:56,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:11:56,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 08:11:56,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 08:11:56,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 08:11:56,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 08:11:56,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 08:11:56,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 08:11:56,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 08:11:56,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 08:11:56,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:11:56,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:11:56,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:11:56,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:11:56,304 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:11:56,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:11:56,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:11:56,305 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:11:56,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:11:56,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:11:56,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:11:56,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:11:56,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:11:56,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:11:56,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:11:56,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:11:56,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:11:56,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:11:56,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:11:56,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:11:56,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:11:56,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:11:56,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:11:56,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:11:56,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:11:56,308 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:11:56,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:11:56,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:11:56,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:11:56,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:11:56,670 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:11:56,670 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:11:56,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2021-05-06 08:11:56,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a908d98c/f7e1f83821c3447c8f58cc662b8669a5/FLAG2261435c6 [2021-05-06 08:11:57,122 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:11:57,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2021-05-06 08:11:57,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a908d98c/f7e1f83821c3447c8f58cc662b8669a5/FLAG2261435c6 [2021-05-06 08:11:57,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a908d98c/f7e1f83821c3447c8f58cc662b8669a5 [2021-05-06 08:11:57,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:11:57,146 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:11:57,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:11:57,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:11:57,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:11:57,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:11:57" (1/1) ... [2021-05-06 08:11:57,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b086da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57, skipping insertion in model container [2021-05-06 08:11:57,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:11:57" (1/1) ... [2021-05-06 08:11:57,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:11:57,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:11:57,281 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/egcd-ll_unwindbound50.c[489,502] [2021-05-06 08:11:57,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:11:57,297 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:11:57,305 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/egcd-ll_unwindbound50.c[489,502] [2021-05-06 08:11:57,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:11:57,321 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:11:57,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57 WrapperNode [2021-05-06 08:11:57,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:11:57,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:11:57,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:11:57,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:11:57,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57" (1/1) ... [2021-05-06 08:11:57,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57" (1/1) ... [2021-05-06 08:11:57,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57" (1/1) ... [2021-05-06 08:11:57,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57" (1/1) ... [2021-05-06 08:11:57,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57" (1/1) ... [2021-05-06 08:11:57,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57" (1/1) ... [2021-05-06 08:11:57,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57" (1/1) ... [2021-05-06 08:11:57,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:11:57,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:11:57,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:11:57,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:11:57,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57" (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 08:11:57,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:11:57,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:11:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:11:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:11:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:11:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:11:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:11:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:11:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:11:57,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:11:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:11:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:11:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:11:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:11:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:11:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:11:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:11:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:11:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:11:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:11:57,730 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:11:57,730 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:11:57,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:11:57 BoogieIcfgContainer [2021-05-06 08:11:57,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:11:57,732 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:11:57,732 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:11:57,732 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:11:57,734 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:11:57" (1/1) ... [2021-05-06 08:11:57,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:11:57 BasicIcfg [2021-05-06 08:11:57,766 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:11:57,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:11:57,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:11:57,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:11:57,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:11:57" (1/4) ... [2021-05-06 08:11:57,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45449c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:11:57, skipping insertion in model container [2021-05-06 08:11:57,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:11:57" (2/4) ... [2021-05-06 08:11:57,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45449c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:11:57, skipping insertion in model container [2021-05-06 08:11:57,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:11:57" (3/4) ... [2021-05-06 08:11:57,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45449c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:11:57, skipping insertion in model container [2021-05-06 08:11:57,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:11:57" (4/4) ... [2021-05-06 08:11:57,771 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound50.cJordan [2021-05-06 08:11:57,775 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:11:57,779 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:11:57,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:11:57,810 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:11:57,810 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:11:57,810 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:11:57,810 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:11:57,810 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:11:57,811 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:11:57,811 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:11:57,811 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:11:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:11:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:11:57,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:57,830 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:11:57,830 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:57,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2021-05-06 08:11:57,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:57,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168805632] [2021-05-06 08:11:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:58,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:11:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:58,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:11:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:58,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:11:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:11:58,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:58,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168805632] [2021-05-06 08:11:58,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168805632] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:11:58,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:11:58,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:11:58,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477193110] [2021-05-06 08:11:58,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:11:58,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:58,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:11:58,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:11:58,120 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:11:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:58,240 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-06 08:11:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:11:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 08:11:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:58,247 INFO L225 Difference]: With dead ends: 36 [2021-05-06 08:11:58,247 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 08:11:58,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:11:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 08:11:58,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 08:11:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:11:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 08:11:58,272 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 08:11:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:58,273 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 08:11:58,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:11:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 08:11:58,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:11:58,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:58,274 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:11:58,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:11:58,275 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:58,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:58,275 INFO L82 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2021-05-06 08:11:58,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:58,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674750187] [2021-05-06 08:11:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:58,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:11:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:58,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:11:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:58,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:11:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:11:58,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:58,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674750187] [2021-05-06 08:11:58,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674750187] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:11:58,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:11:58,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:11:58,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095797713] [2021-05-06 08:11:58,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:11:58,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:58,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:11:58,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:11:58,362 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:11:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:58,467 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-06 08:11:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:11:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:11:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:58,468 INFO L225 Difference]: With dead ends: 32 [2021-05-06 08:11:58,468 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:11:58,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:11:58,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:11:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:11:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:11:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:11:58,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 08:11:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:58,473 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:11:58,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:11:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:11:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:11:58,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:58,474 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:11:58,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:11:58,474 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:58,475 INFO L82 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2021-05-06 08:11:58,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:58,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248350373] [2021-05-06 08:11:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:58,485 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:58,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544123786] [2021-05-06 08:11:58,486 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 08:11:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:11:58,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:58,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:11:58,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:58,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248350373] [2021-05-06 08:11:58,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:58,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544123786] [2021-05-06 08:11:58,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544123786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:11:58,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:11:58,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:11:58,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865917081] [2021-05-06 08:11:58,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:11:58,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:58,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:11:58,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:11:58,668 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:11:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:58,706 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-05-06 08:11:58,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:11:58,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:11:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:58,707 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:11:58,707 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:11:58,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:11:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:11:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 08:11:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:11:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 08:11:58,714 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 08:11:58,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:58,714 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 08:11:58,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:11:58,714 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 08:11:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:11:58,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:58,715 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:11:58,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:11:58,936 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:58,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2021-05-06 08:11:58,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:58,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042873598] [2021-05-06 08:11:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:58,944 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:58,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265572818] [2021-05-06 08:11:58,945 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 08:11:59,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:59,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:11:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:59,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:59,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:59,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:59,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:59,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:11:59,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:59,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042873598] [2021-05-06 08:11:59,107 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:59,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265572818] [2021-05-06 08:11:59,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265572818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:11:59,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:11:59,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:11:59,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361255561] [2021-05-06 08:11:59,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:11:59,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:59,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:11:59,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:11:59,108 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:11:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:59,198 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2021-05-06 08:11:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:11:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:11:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:59,201 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:11:59,201 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:11:59,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:11:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:11:59,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 08:11:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:11:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 08:11:59,208 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 08:11:59,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:59,209 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 08:11:59,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:11:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 08:11:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:11:59,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:59,210 INFO L523 BasicCegarLoop]: trace histogram [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, 1] [2021-05-06 08:11:59,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:11:59,427 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:59,428 INFO L82 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2021-05-06 08:11:59,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:59,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110244059] [2021-05-06 08:11:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:59,435 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:59,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141185874] [2021-05-06 08:11:59,436 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 08:11:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:59,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:11:59,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:59,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 08:11:59,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:59,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110244059] [2021-05-06 08:11:59,545 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:59,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141185874] [2021-05-06 08:11:59,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141185874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:11:59,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:11:59,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:11:59,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18726535] [2021-05-06 08:11:59,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:11:59,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:59,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:11:59,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:11:59,546 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:11:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:59,579 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-05-06 08:11:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:11:59,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:11:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:59,580 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:11:59,580 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:11:59,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:11:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:11:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:11:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:11:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 08:11:59,585 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 08:11:59,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:59,585 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 08:11:59,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:11:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 08:11:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:11:59,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:59,586 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-05-06 08:11:59,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:11:59,807 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2021-05-06 08:11:59,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:59,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644815582] [2021-05-06 08:11:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:59,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:59,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9342204] [2021-05-06 08:11:59,815 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 08:11:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:59,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:11:59,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:59,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:11:59,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:59,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644815582] [2021-05-06 08:11:59,924 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:59,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9342204] [2021-05-06 08:11:59,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9342204] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:11:59,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:11:59,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:11:59,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775480661] [2021-05-06 08:11:59,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:11:59,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:59,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:11:59,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:11:59,925 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 08:11:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:59,977 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-05-06 08:11:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:11:59,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-06 08:11:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:59,979 INFO L225 Difference]: With dead ends: 75 [2021-05-06 08:11:59,979 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 08:11:59,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:11:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 08:11:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 08:11:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:11:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 08:11:59,986 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 08:11:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:59,986 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 08:11:59,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 08:11:59,986 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 08:11:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:11:59,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:59,988 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-05-06 08:12:00,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:00,208 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:00,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2021-05-06 08:12:00,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:00,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645093454] [2021-05-06 08:12:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:00,215 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:00,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806127935] [2021-05-06 08:12:00,216 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 08:12:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:00,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:12:00,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:00,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:12:00,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:00,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645093454] [2021-05-06 08:12:00,491 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:00,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806127935] [2021-05-06 08:12:00,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806127935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:00,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:00,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:12:00,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444973714] [2021-05-06 08:12:00,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:00,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:00,493 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:12:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:00,541 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-05-06 08:12:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:12:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 08:12:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:00,558 INFO L225 Difference]: With dead ends: 99 [2021-05-06 08:12:00,560 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 08:12:00,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:00,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 08:12:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 08:12:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 08:12:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 08:12:00,578 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 08:12:00,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:00,578 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 08:12:00,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:12:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 08:12:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:12:00,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:00,579 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 08:12:00,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 08:12:00,794 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:00,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:00,794 INFO L82 PathProgramCache]: Analyzing trace with hash -739890515, now seen corresponding path program 1 times [2021-05-06 08:12:00,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:00,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518601947] [2021-05-06 08:12:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:00,801 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:00,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001152119] [2021-05-06 08:12:00,802 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 08:12:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:00,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:12:00,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:01,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:12:01,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:01,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518601947] [2021-05-06 08:12:01,039 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:01,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001152119] [2021-05-06 08:12:01,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001152119] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:01,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:01,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:01,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330900107] [2021-05-06 08:12:01,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:01,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:01,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:01,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:01,040 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:12:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:01,099 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-05-06 08:12:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:01,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-06 08:12:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:01,100 INFO L225 Difference]: With dead ends: 104 [2021-05-06 08:12:01,100 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 08:12:01,101 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 08:12:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 08:12:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 08:12:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 08:12:01,106 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 08:12:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:01,106 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 08:12:01,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:12:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 08:12:01,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:12:01,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:01,107 INFO L523 BasicCegarLoop]: trace histogram [5, 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] [2021-05-06 08:12:01,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:01,330 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:01,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:01,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2021-05-06 08:12:01,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:01,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371216092] [2021-05-06 08:12:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:01,336 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:01,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081535106] [2021-05-06 08:12:01,337 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 08:12:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:12:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:01,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:12:01,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:01,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371216092] [2021-05-06 08:12:01,502 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:01,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081535106] [2021-05-06 08:12:01,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081535106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:01,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:01,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:01,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976750460] [2021-05-06 08:12:01,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:01,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:01,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:01,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:01,504 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:12:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:01,614 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-06 08:12:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:01,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 08:12:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:01,615 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:12:01,615 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:12:01,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:12:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 08:12:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 08:12:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 08:12:01,621 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 08:12:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:01,621 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 08:12:01,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:12:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 08:12:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:12:01,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:01,622 INFO L523 BasicCegarLoop]: trace histogram [5, 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] [2021-05-06 08:12:01,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:01,842 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:01,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 1 times [2021-05-06 08:12:01,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:01,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662737095] [2021-05-06 08:12:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:01,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:01,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298346597] [2021-05-06 08:12:01,849 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 08:12:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:01,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:12:01,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:01,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:01,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 08:12:02,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:02,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662737095] [2021-05-06 08:12:02,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:02,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298346597] [2021-05-06 08:12:02,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298346597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:02,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:02,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:02,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332445431] [2021-05-06 08:12:02,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:02,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:02,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:02,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:02,045 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 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 08:12:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:02,151 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2021-05-06 08:12:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:02,151 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 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 47 [2021-05-06 08:12:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:02,153 INFO L225 Difference]: With dead ends: 129 [2021-05-06 08:12:02,153 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 08:12:02,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 08:12:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 08:12:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 08:12:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 08:12:02,159 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 08:12:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:02,159 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 08:12:02,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 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 08:12:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 08:12:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:12:02,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:02,160 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2021-05-06 08:12:02,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:12:02,376 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1023588343, now seen corresponding path program 2 times [2021-05-06 08:12:02,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:02,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466681968] [2021-05-06 08:12:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:02,390 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:02,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129500686] [2021-05-06 08:12:02,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:02,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:02,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:02,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:12:02,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:02,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-06 08:12:02,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:02,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466681968] [2021-05-06 08:12:02,580 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:02,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129500686] [2021-05-06 08:12:02,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129500686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:02,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:02,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:02,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782515042] [2021-05-06 08:12:02,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:02,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:02,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:02,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:02,583 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:12:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:02,703 INFO L93 Difference]: Finished difference Result 149 states and 201 transitions. [2021-05-06 08:12:02,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:02,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 08:12:02,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:02,705 INFO L225 Difference]: With dead ends: 149 [2021-05-06 08:12:02,705 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 08:12:02,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:02,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 08:12:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 08:12:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:12:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 08:12:02,711 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 08:12:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:02,711 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 08:12:02,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:12:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 08:12:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:12:02,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:02,712 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 08:12:02,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:02,929 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:02,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:02,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1153573054, now seen corresponding path program 2 times [2021-05-06 08:12:02,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:02,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849326542] [2021-05-06 08:12:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:02,936 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:02,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922783280] [2021-05-06 08:12:02,936 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 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 08:12:03,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:03,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:03,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:12:03,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:03,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:12:03,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:03,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849326542] [2021-05-06 08:12:03,113 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:03,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922783280] [2021-05-06 08:12:03,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922783280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:03,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:03,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:12:03,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040318100] [2021-05-06 08:12:03,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:12:03,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:03,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:12:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:03,114 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:12:03,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:03,157 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2021-05-06 08:12:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:03,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 08:12:03,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:03,159 INFO L225 Difference]: With dead ends: 173 [2021-05-06 08:12:03,159 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 08:12:03,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 08:12:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 08:12:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:12:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-06 08:12:03,165 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-06 08:12:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:03,165 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-06 08:12:03,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:12:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-06 08:12:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:12:03,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:03,166 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:03,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:03,385 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:03,385 INFO L82 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2021-05-06 08:12:03,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:03,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130326498] [2021-05-06 08:12:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:03,391 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:03,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431018011] [2021-05-06 08:12:03,391 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 08:12:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:03,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:03,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:12:03,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:03,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130326498] [2021-05-06 08:12:03,553 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:03,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431018011] [2021-05-06 08:12:03,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431018011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:03,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:03,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:03,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666795529] [2021-05-06 08:12:03,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:03,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:03,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:03,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:03,554 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:03,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:03,627 INFO L93 Difference]: Finished difference Result 186 states and 235 transitions. [2021-05-06 08:12:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:12:03,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 08:12:03,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:03,629 INFO L225 Difference]: With dead ends: 186 [2021-05-06 08:12:03,629 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 08:12:03,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 08:12:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 08:12:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 08:12:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 08:12:03,634 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-06 08:12:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:03,635 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 08:12:03,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 08:12:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:12:03,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:03,636 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:03,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:12:03,853 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1121480771, now seen corresponding path program 2 times [2021-05-06 08:12:03,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:03,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031697135] [2021-05-06 08:12:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:03,859 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:03,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843409124] [2021-05-06 08:12:03,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:03,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:03,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:03,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:04,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 08:12:04,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:04,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031697135] [2021-05-06 08:12:04,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:04,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843409124] [2021-05-06 08:12:04,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843409124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:04,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:04,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:04,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446165342] [2021-05-06 08:12:04,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:04,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:04,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:04,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:04,071 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:04,147 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2021-05-06 08:12:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:12:04,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 08:12:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:04,149 INFO L225 Difference]: With dead ends: 196 [2021-05-06 08:12:04,149 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 08:12:04,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 08:12:04,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 08:12:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 08:12:04,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-06 08:12:04,155 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-06 08:12:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:04,155 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-06 08:12:04,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-06 08:12:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:12:04,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:04,156 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:04,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:12:04,373 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:04,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:04,374 INFO L82 PathProgramCache]: Analyzing trace with hash -718576292, now seen corresponding path program 2 times [2021-05-06 08:12:04,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:04,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148089986] [2021-05-06 08:12:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:04,380 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:04,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519609052] [2021-05-06 08:12:04,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:12:04,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:04,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:04,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:12:04,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:04,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-06 08:12:04,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:04,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148089986] [2021-05-06 08:12:04,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:04,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519609052] [2021-05-06 08:12:04,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519609052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:04,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:04,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:12:04,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336611212] [2021-05-06 08:12:04,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:12:04,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:04,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:12:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:04,707 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:12:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:04,923 INFO L93 Difference]: Finished difference Result 217 states and 279 transitions. [2021-05-06 08:12:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:12:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 08:12:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:04,924 INFO L225 Difference]: With dead ends: 217 [2021-05-06 08:12:04,924 INFO L226 Difference]: Without dead ends: 217 [2021-05-06 08:12:04,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:12:04,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-06 08:12:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-06 08:12:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:12:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-06 08:12:04,931 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-06 08:12:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:04,931 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-06 08:12:04,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:12:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-06 08:12:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:12:04,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:04,932 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:05,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:12:05,152 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:05,153 INFO L82 PathProgramCache]: Analyzing trace with hash -367776355, now seen corresponding path program 3 times [2021-05-06 08:12:05,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:05,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275050498] [2021-05-06 08:12:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:05,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:05,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491553647] [2021-05-06 08:12:05,158 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 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 08:12:05,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:12:05,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:05,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:12:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:05,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:12:05,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:05,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275050498] [2021-05-06 08:12:05,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:05,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491553647] [2021-05-06 08:12:05,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491553647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:05,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:05,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:05,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867110903] [2021-05-06 08:12:05,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:05,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:05,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:05,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:05,380 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:12:05,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:05,478 INFO L93 Difference]: Finished difference Result 233 states and 300 transitions. [2021-05-06 08:12:05,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 08:12:05,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:05,479 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:12:05,479 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:12:05,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:05,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:12:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-06 08:12:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:12:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-06 08:12:05,485 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-06 08:12:05,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:05,486 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-06 08:12:05,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:12:05,486 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-06 08:12:05,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:12:05,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:05,486 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:05,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:05,707 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:05,707 INFO L82 PathProgramCache]: Analyzing trace with hash 876232379, now seen corresponding path program 4 times [2021-05-06 08:12:05,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:05,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730681063] [2021-05-06 08:12:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:05,713 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:05,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705837120] [2021-05-06 08:12:05,713 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 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 08:12:05,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:12:05,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:05,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:12:05,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:05,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 43 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-06 08:12:05,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:05,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730681063] [2021-05-06 08:12:05,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:05,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705837120] [2021-05-06 08:12:05,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705837120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:05,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:05,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:05,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047617693] [2021-05-06 08:12:05,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:05,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:05,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:05,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:05,959 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:06,177 INFO L93 Difference]: Finished difference Result 240 states and 308 transitions. [2021-05-06 08:12:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:12:06,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 08:12:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:06,178 INFO L225 Difference]: With dead ends: 240 [2021-05-06 08:12:06,178 INFO L226 Difference]: Without dead ends: 235 [2021-05-06 08:12:06,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-06 08:12:06,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-06 08:12:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 08:12:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-06 08:12:06,184 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-06 08:12:06,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:06,184 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-06 08:12:06,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-06 08:12:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:12:06,185 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:06,185 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:06,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:12:06,402 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:06,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1468434662, now seen corresponding path program 3 times [2021-05-06 08:12:06,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:06,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123594154] [2021-05-06 08:12:06,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:06,408 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:06,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969952398] [2021-05-06 08:12:06,408 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 08:12:06,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:12:06,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:12:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:06,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 08:12:06,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:06,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123594154] [2021-05-06 08:12:06,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:06,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969952398] [2021-05-06 08:12:06,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969952398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:06,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:06,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:06,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230678530] [2021-05-06 08:12:06,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:06,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:06,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:06,678 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:06,961 INFO L93 Difference]: Finished difference Result 227 states and 290 transitions. [2021-05-06 08:12:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:12:06,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 08:12:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:06,962 INFO L225 Difference]: With dead ends: 227 [2021-05-06 08:12:06,962 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 08:12:06,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 08:12:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-05-06 08:12:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 139 states have internal predecessors, (155), 60 states have call successors, (60), 27 states have call predecessors, (60), 26 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-06 08:12:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2021-05-06 08:12:06,967 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 271 transitions. Word has length 71 [2021-05-06 08:12:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:06,968 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 271 transitions. [2021-05-06 08:12:06,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 271 transitions. [2021-05-06 08:12:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:12:06,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:06,968 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 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] [2021-05-06 08:12:07,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:12:07,181 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:07,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1531334864, now seen corresponding path program 3 times [2021-05-06 08:12:07,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:07,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558999897] [2021-05-06 08:12:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:07,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:07,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740696601] [2021-05-06 08:12:07,187 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 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 08:12:07,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:12:07,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:07,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:12:07,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:07,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:12:07,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:07,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558999897] [2021-05-06 08:12:07,369 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:07,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740696601] [2021-05-06 08:12:07,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740696601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:07,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:07,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:07,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455427712] [2021-05-06 08:12:07,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:07,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:07,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:07,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:07,370 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:12:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:07,426 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2021-05-06 08:12:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:12:07,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-06 08:12:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:07,427 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:12:07,428 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 08:12:07,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 08:12:07,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-06 08:12:07,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 08:12:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-06 08:12:07,433 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-06 08:12:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:07,433 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-06 08:12:07,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:12:07,433 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-06 08:12:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:12:07,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:07,434 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:07,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:07,654 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1875056275, now seen corresponding path program 5 times [2021-05-06 08:12:07,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:07,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143615420] [2021-05-06 08:12:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:07,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:07,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22366473] [2021-05-06 08:12:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:08,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:12:08,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:08,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:12:08,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:08,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-06 08:12:08,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:08,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143615420] [2021-05-06 08:12:08,188 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:08,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22366473] [2021-05-06 08:12:08,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22366473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:08,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:08,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:12:08,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157748134] [2021-05-06 08:12:08,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:12:08,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:08,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:12:08,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:08,189 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:12:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:08,241 INFO L93 Difference]: Finished difference Result 264 states and 326 transitions. [2021-05-06 08:12:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:12:08,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 80 [2021-05-06 08:12:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:08,243 INFO L225 Difference]: With dead ends: 264 [2021-05-06 08:12:08,243 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 08:12:08,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 08:12:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-06 08:12:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:12:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-06 08:12:08,249 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-06 08:12:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:08,249 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-06 08:12:08,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:12:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-06 08:12:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:12:08,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:08,250 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:08,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:08,450 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:08,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:08,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1563427147, now seen corresponding path program 6 times [2021-05-06 08:12:08,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:08,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902169391] [2021-05-06 08:12:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:08,455 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:08,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34024362] [2021-05-06 08:12:08,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:08,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 08:12:08,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:08,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:12:08,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:08,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:08,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:08,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:08,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:08,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:08,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:08,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-06 08:12:08,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:08,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902169391] [2021-05-06 08:12:08,662 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:08,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34024362] [2021-05-06 08:12:08,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34024362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:08,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:08,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:08,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401127375] [2021-05-06 08:12:08,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:08,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:08,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:08,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:08,663 INFO L87 Difference]: Start difference. First operand 250 states and 307 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:12:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:08,727 INFO L93 Difference]: Finished difference Result 254 states and 310 transitions. [2021-05-06 08:12:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:12:08,727 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2021-05-06 08:12:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:08,728 INFO L225 Difference]: With dead ends: 254 [2021-05-06 08:12:08,728 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 08:12:08,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 08:12:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2021-05-06 08:12:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 164 states have internal predecessors, (179), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:12:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2021-05-06 08:12:08,733 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 80 [2021-05-06 08:12:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:08,734 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2021-05-06 08:12:08,734 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:12:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2021-05-06 08:12:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:12:08,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:08,735 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:08,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:08,953 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:08,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:08,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1072579442, now seen corresponding path program 3 times [2021-05-06 08:12:08,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:08,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465000199] [2021-05-06 08:12:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:08,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:08,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196065210] [2021-05-06 08:12:08,959 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 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 08:12:09,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:12:09,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:09,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:12:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:09,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 08:12:09,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:09,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465000199] [2021-05-06 08:12:09,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:09,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196065210] [2021-05-06 08:12:09,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196065210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:09,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:09,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:09,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958751841] [2021-05-06 08:12:09,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:09,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:09,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:09,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:09,220 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:12:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:09,483 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2021-05-06 08:12:09,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:12:09,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 08:12:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:09,485 INFO L225 Difference]: With dead ends: 284 [2021-05-06 08:12:09,485 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 08:12:09,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 08:12:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-05-06 08:12:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 162 states have (on average 1.1604938271604939) internal successors, (188), 171 states have internal predecessors, (188), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (62), 55 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:12:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-06 08:12:09,491 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 85 [2021-05-06 08:12:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:09,491 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-06 08:12:09,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:12:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-06 08:12:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:12:09,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:09,492 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:09,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:12:09,710 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:09,711 INFO L82 PathProgramCache]: Analyzing trace with hash -721779505, now seen corresponding path program 7 times [2021-05-06 08:12:09,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:09,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958516119] [2021-05-06 08:12:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:09,719 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:09,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206392067] [2021-05-06 08:12:09,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:12:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:09,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 08:12:09,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:09,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:09,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:10,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:10,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:10,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:10,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:10,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 08:12:10,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:10,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958516119] [2021-05-06 08:12:10,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:10,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206392067] [2021-05-06 08:12:10,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206392067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:10,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:10,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:10,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135958140] [2021-05-06 08:12:10,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:10,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:10,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:10,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:10,071 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:12:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:10,766 INFO L93 Difference]: Finished difference Result 306 states and 374 transitions. [2021-05-06 08:12:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:10,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 08:12:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:10,768 INFO L225 Difference]: With dead ends: 306 [2021-05-06 08:12:10,768 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 08:12:10,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 08:12:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2021-05-06 08:12:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 189 states have (on average 1.164021164021164) internal successors, (220), 198 states have internal predecessors, (220), 74 states have call successors, (74), 38 states have call predecessors, (74), 37 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:12:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 365 transitions. [2021-05-06 08:12:10,776 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 365 transitions. Word has length 85 [2021-05-06 08:12:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:10,776 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 365 transitions. [2021-05-06 08:12:10,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:12:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 365 transitions. [2021-05-06 08:12:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:12:10,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:10,778 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:10,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:12:10,993 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:10,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:10,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1313119571, now seen corresponding path program 8 times [2021-05-06 08:12:10,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:10,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807920822] [2021-05-06 08:12:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:11,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:11,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156328127] [2021-05-06 08:12:11,005 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 08:12:11,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:11,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:11,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 08:12:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:11,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:11,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:11,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 59 proven. 57 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-06 08:12:11,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:11,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807920822] [2021-05-06 08:12:11,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:11,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156328127] [2021-05-06 08:12:11,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156328127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:11,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:11,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:11,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229651354] [2021-05-06 08:12:11,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:11,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:11,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:11,289 INFO L87 Difference]: Start difference. First operand 301 states and 365 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:12:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:11,839 INFO L93 Difference]: Finished difference Result 328 states and 404 transitions. [2021-05-06 08:12:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:12:11,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 08:12:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:11,841 INFO L225 Difference]: With dead ends: 328 [2021-05-06 08:12:11,841 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 08:12:11,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 08:12:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2021-05-06 08:12:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 185 states have internal predecessors, (206), 71 states have call successors, (71), 35 states have call predecessors, (71), 34 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 08:12:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2021-05-06 08:12:11,848 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 85 [2021-05-06 08:12:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:11,848 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2021-05-06 08:12:11,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:12:11,848 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2021-05-06 08:12:11,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:12:11,849 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:11,849 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:12,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:12,066 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:12,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:12,067 INFO L82 PathProgramCache]: Analyzing trace with hash -962319634, now seen corresponding path program 9 times [2021-05-06 08:12:12,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:12,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206147608] [2021-05-06 08:12:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:12,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:12,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885692024] [2021-05-06 08:12:12,076 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 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 08:12:12,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:12:12,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:12,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 08:12:12,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:12,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 70 proven. 14 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 08:12:12,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:12,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206147608] [2021-05-06 08:12:12,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:12,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885692024] [2021-05-06 08:12:12,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885692024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:12,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:12,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:12,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246778572] [2021-05-06 08:12:12,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:12,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:12,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:12,302 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:12:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:12,687 INFO L93 Difference]: Finished difference Result 344 states and 439 transitions. [2021-05-06 08:12:12,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:12:12,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 85 [2021-05-06 08:12:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:12,689 INFO L225 Difference]: With dead ends: 344 [2021-05-06 08:12:12,689 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 08:12:12,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 08:12:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 298. [2021-05-06 08:12:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 195 states have internal predecessors, (216), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:12:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2021-05-06 08:12:12,696 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 85 [2021-05-06 08:12:12,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:12,696 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2021-05-06 08:12:12,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:12:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2021-05-06 08:12:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:12:12,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:12,697 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2021-05-06 08:12:12,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:12:12,898 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:12,898 INFO L82 PathProgramCache]: Analyzing trace with hash -201025847, now seen corresponding path program 10 times [2021-05-06 08:12:12,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:12,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567835249] [2021-05-06 08:12:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:12,902 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:12,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046290101] [2021-05-06 08:12:12,903 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 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 08:12:12,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:12:12,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:12:12,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:13,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 08:12:13,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:13,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567835249] [2021-05-06 08:12:13,159 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:13,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046290101] [2021-05-06 08:12:13,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046290101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:13,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:13,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:13,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489120224] [2021-05-06 08:12:13,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:13,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:13,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:13,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:13,163 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:12:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:13,305 INFO L93 Difference]: Finished difference Result 323 states and 407 transitions. [2021-05-06 08:12:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:13,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 08:12:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:13,306 INFO L225 Difference]: With dead ends: 323 [2021-05-06 08:12:13,306 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 08:12:13,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 08:12:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-05-06 08:12:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 194 states have (on average 1.175257731958763) internal successors, (228), 204 states have internal predecessors, (228), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (78), 71 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-06 08:12:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 388 transitions. [2021-05-06 08:12:13,313 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 388 transitions. Word has length 90 [2021-05-06 08:12:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:13,313 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 388 transitions. [2021-05-06 08:12:13,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:12:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 388 transitions. [2021-05-06 08:12:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:12:13,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:13,315 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2021-05-06 08:12:13,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:13,533 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:13,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:13,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1749274408, now seen corresponding path program 11 times [2021-05-06 08:12:13,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:13,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179966973] [2021-05-06 08:12:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:13,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:13,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515688844] [2021-05-06 08:12:13,542 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 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 08:12:14,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:12:14,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:14,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:12:14,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:14,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 08:12:15,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:15,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179966973] [2021-05-06 08:12:15,041 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:15,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515688844] [2021-05-06 08:12:15,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515688844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:15,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:15,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:15,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013209120] [2021-05-06 08:12:15,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:15,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:15,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:15,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:15,042 INFO L87 Difference]: Start difference. First operand 314 states and 388 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:12:15,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:15,713 INFO L93 Difference]: Finished difference Result 357 states and 447 transitions. [2021-05-06 08:12:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:15,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 08:12:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:15,715 INFO L225 Difference]: With dead ends: 357 [2021-05-06 08:12:15,715 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 08:12:15,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 08:12:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 337. [2021-05-06 08:12:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 209 states have (on average 1.167464114832536) internal successors, (244), 220 states have internal predecessors, (244), 87 states have call successors, (87), 41 states have call predecessors, (87), 40 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:12:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 414 transitions. [2021-05-06 08:12:15,722 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 414 transitions. Word has length 90 [2021-05-06 08:12:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:15,722 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 414 transitions. [2021-05-06 08:12:15,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:12:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 414 transitions. [2021-05-06 08:12:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:12:15,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:15,724 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2021-05-06 08:12:15,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:12:15,932 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:15,932 INFO L82 PathProgramCache]: Analyzing trace with hash 492366858, now seen corresponding path program 12 times [2021-05-06 08:12:15,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:15,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545868922] [2021-05-06 08:12:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:15,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:15,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912334235] [2021-05-06 08:12:15,937 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 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 08:12:16,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:12:16,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:12:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:16,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:16,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:16,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:16,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,401 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-06 08:12:18,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 08:12:18,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:18,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545868922] [2021-05-06 08:12:18,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:18,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912334235] [2021-05-06 08:12:18,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912334235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:18,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:18,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:18,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723228333] [2021-05-06 08:12:18,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:18,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:18,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:18,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:18,436 INFO L87 Difference]: Start difference. First operand 337 states and 414 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:12:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:51,799 INFO L93 Difference]: Finished difference Result 399 states and 510 transitions. [2021-05-06 08:12:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:51,799 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2021-05-06 08:12:51,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:51,801 INFO L225 Difference]: With dead ends: 399 [2021-05-06 08:12:51,801 INFO L226 Difference]: Without dead ends: 383 [2021-05-06 08:12:51,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2301.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-06 08:12:51,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2021-05-06 08:12:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 234 states have (on average 1.1837606837606838) internal successors, (277), 243 states have internal predecessors, (277), 97 states have call successors, (97), 43 states have call predecessors, (97), 42 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 08:12:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 467 transitions. [2021-05-06 08:12:51,821 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 467 transitions. Word has length 90 [2021-05-06 08:12:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:51,822 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 467 transitions. [2021-05-06 08:12:51,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:12:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 467 transitions. [2021-05-06 08:12:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:12:51,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:51,833 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:52,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:12:52,033 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1503864962, now seen corresponding path program 4 times [2021-05-06 08:12:52,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:52,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343007673] [2021-05-06 08:12:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:52,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:52,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510636849] [2021-05-06 08:12:52,038 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 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 08:12:52,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:12:52,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:12:52,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:52,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:12:52,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:52,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343007673] [2021-05-06 08:12:52,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:52,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510636849] [2021-05-06 08:12:52,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510636849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:52,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:52,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:52,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299613328] [2021-05-06 08:12:52,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:52,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:52,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:52,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:52,331 INFO L87 Difference]: Start difference. First operand 374 states and 467 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:12:52,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:52,405 INFO L93 Difference]: Finished difference Result 460 states and 546 transitions. [2021-05-06 08:12:52,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:12:52,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2021-05-06 08:12:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:52,407 INFO L225 Difference]: With dead ends: 460 [2021-05-06 08:12:52,407 INFO L226 Difference]: Without dead ends: 460 [2021-05-06 08:12:52,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-06 08:12:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-05-06 08:12:52,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 280 states have (on average 1.1392857142857142) internal successors, (319), 290 states have internal predecessors, (319), 97 states have call successors, (97), 55 states have call predecessors, (97), 54 states have return successors, (93), 86 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 08:12:52,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 509 transitions. [2021-05-06 08:12:52,416 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 509 transitions. Word has length 99 [2021-05-06 08:12:52,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:52,416 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 509 transitions. [2021-05-06 08:12:52,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:12:52,416 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 509 transitions. [2021-05-06 08:12:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:12:52,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:52,417 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:52,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:12:52,635 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:52,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:52,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1826743324, now seen corresponding path program 4 times [2021-05-06 08:12:52,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:52,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606357079] [2021-05-06 08:12:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:52,641 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:52,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770991018] [2021-05-06 08:12:52,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:52,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:12:52,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:12:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:52,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:52,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-06 08:12:53,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:53,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606357079] [2021-05-06 08:12:53,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:53,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770991018] [2021-05-06 08:12:53,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770991018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:53,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:53,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:12:53,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641517118] [2021-05-06 08:12:53,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:12:53,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:53,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:12:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:53,205 INFO L87 Difference]: Start difference. First operand 432 states and 509 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 08:12:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:54,186 INFO L93 Difference]: Finished difference Result 467 states and 565 transitions. [2021-05-06 08:12:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:12:54,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 104 [2021-05-06 08:12:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:54,188 INFO L225 Difference]: With dead ends: 467 [2021-05-06 08:12:54,188 INFO L226 Difference]: Without dead ends: 467 [2021-05-06 08:12:54,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:12:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-06 08:12:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 443. [2021-05-06 08:12:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 287 states have (on average 1.1428571428571428) internal successors, (328), 297 states have internal predecessors, (328), 100 states have call successors, (100), 56 states have call predecessors, (100), 55 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-06 08:12:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 524 transitions. [2021-05-06 08:12:54,196 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 524 transitions. Word has length 104 [2021-05-06 08:12:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:54,197 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 524 transitions. [2021-05-06 08:12:54,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 08:12:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 524 transitions. [2021-05-06 08:12:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:12:54,197 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:54,198 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 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] [2021-05-06 08:12:54,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:54,415 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:54,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2117424035, now seen corresponding path program 13 times [2021-05-06 08:12:54,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:54,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162689501] [2021-05-06 08:12:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:54,428 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:54,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035181362] [2021-05-06 08:12:54,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 08:12:54,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:54,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-05-06 08:12:54,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:54,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162689501] [2021-05-06 08:12:54,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:54,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035181362] [2021-05-06 08:12:54,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035181362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:54,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:54,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:54,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851786470] [2021-05-06 08:12:54,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:54,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:54,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:54,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:54,793 INFO L87 Difference]: Start difference. First operand 443 states and 524 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:12:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:55,120 INFO L93 Difference]: Finished difference Result 470 states and 563 transitions. [2021-05-06 08:12:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:12:55,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 08:12:55,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:55,123 INFO L225 Difference]: With dead ends: 470 [2021-05-06 08:12:55,123 INFO L226 Difference]: Without dead ends: 470 [2021-05-06 08:12:55,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-06 08:12:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 454. [2021-05-06 08:12:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 294 states have (on average 1.1428571428571428) internal successors, (336), 304 states have internal predecessors, (336), 103 states have call successors, (103), 57 states have call predecessors, (103), 56 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 08:12:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2021-05-06 08:12:55,131 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 104 [2021-05-06 08:12:55,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:55,131 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2021-05-06 08:12:55,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:12:55,131 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2021-05-06 08:12:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:12:55,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:55,132 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 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] [2021-05-06 08:12:55,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:12:55,349 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:55,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1586203195, now seen corresponding path program 14 times [2021-05-06 08:12:55,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:55,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76652532] [2021-05-06 08:12:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:55,355 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:55,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698688541] [2021-05-06 08:12:55,355 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 08:12:55,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:55,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:55,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:12:55,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:55,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 08:12:55,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:55,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76652532] [2021-05-06 08:12:55,718 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:55,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698688541] [2021-05-06 08:12:55,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698688541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:55,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:55,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:55,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157098318] [2021-05-06 08:12:55,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:55,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:55,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:55,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:55,721 INFO L87 Difference]: Start difference. First operand 454 states and 538 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 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 08:12:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:56,251 INFO L93 Difference]: Finished difference Result 495 states and 589 transitions. [2021-05-06 08:12:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 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 104 [2021-05-06 08:12:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:56,254 INFO L225 Difference]: With dead ends: 495 [2021-05-06 08:12:56,254 INFO L226 Difference]: Without dead ends: 495 [2021-05-06 08:12:56,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-06 08:12:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 460. [2021-05-06 08:12:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 308 states have internal predecessors, (343), 101 states have call successors, (101), 59 states have call predecessors, (101), 58 states have return successors, (97), 92 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-06 08:12:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 541 transitions. [2021-05-06 08:12:56,262 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 541 transitions. Word has length 104 [2021-05-06 08:12:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:56,262 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 541 transitions. [2021-05-06 08:12:56,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 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 08:12:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 541 transitions. [2021-05-06 08:12:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:12:56,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:56,263 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:56,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:56,481 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1937003132, now seen corresponding path program 15 times [2021-05-06 08:12:56,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:56,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17915558] [2021-05-06 08:12:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:56,487 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:56,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602253457] [2021-05-06 08:12:56,488 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 08:12:57,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:12:57,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:57,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:12:57,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:57,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:10,117 WARN L205 SmtUtils]: Spent 8.20 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-06 08:13:10,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:10,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:10,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 90 proven. 56 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-05-06 08:13:10,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:10,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17915558] [2021-05-06 08:13:10,793 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:10,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602253457] [2021-05-06 08:13:10,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602253457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:10,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:10,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:13:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611281508] [2021-05-06 08:13:10,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:13:10,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:13:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:13:10,794 INFO L87 Difference]: Start difference. First operand 460 states and 541 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:13:33,849 WARN L205 SmtUtils]: Spent 20.62 s on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-05-06 08:15:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:31,621 INFO L93 Difference]: Finished difference Result 567 states and 702 transitions. [2021-05-06 08:15:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:15:31,622 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 104 [2021-05-06 08:15:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:31,624 INFO L225 Difference]: With dead ends: 567 [2021-05-06 08:15:31,624 INFO L226 Difference]: Without dead ends: 563 [2021-05-06 08:15:31,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 35466.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:15:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-05-06 08:15:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 512. [2021-05-06 08:15:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 331 states have (on average 1.1570996978851964) internal successors, (383), 341 states have internal predecessors, (383), 118 states have call successors, (118), 63 states have call predecessors, (118), 62 states have return successors, (114), 107 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-06 08:15:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 615 transitions. [2021-05-06 08:15:31,633 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 615 transitions. Word has length 104 [2021-05-06 08:15:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:31,633 INFO L480 AbstractCegarLoop]: Abstraction has 512 states and 615 transitions. [2021-05-06 08:15:31,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:15:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 615 transitions. [2021-05-06 08:15:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:15:31,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:31,634 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 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] [2021-05-06 08:15:31,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 08:15:31,841 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1580430237, now seen corresponding path program 16 times [2021-05-06 08:15:31,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:31,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510606974] [2021-05-06 08:15:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:31,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:31,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933674675] [2021-05-06 08:15:31,849 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 08:15:31,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:15:31,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:31,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:15:31,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:32,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 72 proven. 78 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 08:15:32,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:32,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510606974] [2021-05-06 08:15:32,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:32,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933674675] [2021-05-06 08:15:32,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933674675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:32,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:32,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:15:32,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656441529] [2021-05-06 08:15:32,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:15:32,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:15:32,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:15:32,556 INFO L87 Difference]: Start difference. First operand 512 states and 615 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 08:15:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:34,798 INFO L93 Difference]: Finished difference Result 539 states and 654 transitions. [2021-05-06 08:15:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:15:34,798 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 104 [2021-05-06 08:15:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:34,800 INFO L225 Difference]: With dead ends: 539 [2021-05-06 08:15:34,800 INFO L226 Difference]: Without dead ends: 539 [2021-05-06 08:15:34,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:15:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-05-06 08:15:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 505. [2021-05-06 08:15:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 326 states have (on average 1.156441717791411) internal successors, (377), 337 states have internal predecessors, (377), 117 states have call successors, (117), 62 states have call predecessors, (117), 61 states have return successors, (113), 105 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-06 08:15:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 607 transitions. [2021-05-06 08:15:34,816 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 607 transitions. Word has length 104 [2021-05-06 08:15:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:34,817 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 607 transitions. [2021-05-06 08:15:34,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 08:15:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 607 transitions. [2021-05-06 08:15:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:15:34,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:34,818 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:35,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:15:35,037 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:35,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1931230174, now seen corresponding path program 17 times [2021-05-06 08:15:35,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:35,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967829659] [2021-05-06 08:15:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:35,043 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:35,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141817094] [2021-05-06 08:15:35,043 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 08:15:35,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-06 08:15:35,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:35,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:15:35,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:35,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:35,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:36,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:37,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:13,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:14,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:15,772 WARN L159 QuantifierPusher]: Ignoring assumption.