/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_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:10:49,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:10:49,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:10:49,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:10:49,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:10:49,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:10:49,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:10:49,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:10:49,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:10:49,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:10:49,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:10:49,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:10:49,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:10:49,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:10:49,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:10:49,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:10:49,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:10:49,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:10:49,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:10:49,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:10:49,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:10:49,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:10:49,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:10:49,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:10:49,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:10:49,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 08:10:49,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 08:10:49,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 08:10:49,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 08:10:49,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 08:10:49,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 08:10:49,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 08:10:49,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 08:10:49,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:10:49,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:10:49,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:10:49,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:10:49,358 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:10:49,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:10:49,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:10:49,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:10:49,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:10:49,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:10:49,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:10:49,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:10:49,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:10:49,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:10:49,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:10:49,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:10:49,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:10:49,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:10:49,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:10:49,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:10:49,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:10:49,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:10:49,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:10:49,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:10:49,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:10:49,368 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:10:49,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:10:49,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:10:49,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:10:49,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:10:49,813 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:10:49,814 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:10:49,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2021-05-06 08:10:49,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10747fcbe/c5e669418d574cbaaedbad0e37ecf593/FLAG8e38da0e5 [2021-05-06 08:10:50,200 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:10:50,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2021-05-06 08:10:50,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10747fcbe/c5e669418d574cbaaedbad0e37ecf593/FLAG8e38da0e5 [2021-05-06 08:10:50,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10747fcbe/c5e669418d574cbaaedbad0e37ecf593 [2021-05-06 08:10:50,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:10:50,223 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:10:50,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:10:50,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:10:50,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:10:50,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:10:50" (1/1) ... [2021-05-06 08:10:50,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba30c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50, skipping insertion in model container [2021-05-06 08:10:50,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:10:50" (1/1) ... [2021-05-06 08:10:50,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:10:50,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:10:50,329 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_unwindbound5.c[489,502] [2021-05-06 08:10:50,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:10:50,348 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:10:50,362 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_unwindbound5.c[489,502] [2021-05-06 08:10:50,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:10:50,385 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:10:50,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50 WrapperNode [2021-05-06 08:10:50,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:10:50,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:10:50,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:10:50,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:10:50,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50" (1/1) ... [2021-05-06 08:10:50,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50" (1/1) ... [2021-05-06 08:10:50,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50" (1/1) ... [2021-05-06 08:10:50,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50" (1/1) ... [2021-05-06 08:10:50,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50" (1/1) ... [2021-05-06 08:10:50,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50" (1/1) ... [2021-05-06 08:10:50,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50" (1/1) ... [2021-05-06 08:10:50,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:10:50,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:10:50,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:10:50,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:10:50,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50" (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 08:10:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:10:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:10:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:10:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:10:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:10:50,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:10:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:10:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:10:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:10:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:10:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:10:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:10:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:10:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:10:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:10:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:10:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:10:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:10:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:10:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:10:50,740 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:10:50,740 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:10:50,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:10:50 BoogieIcfgContainer [2021-05-06 08:10:50,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:10:50,742 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:10:50,742 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:10:50,743 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:10:50,745 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:10:50" (1/1) ... [2021-05-06 08:10:50,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:10:50 BasicIcfg [2021-05-06 08:10:50,756 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:10:50,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:10:50,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:10:50,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:10:50,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:10:50" (1/4) ... [2021-05-06 08:10:50,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54641084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:10:50, skipping insertion in model container [2021-05-06 08:10:50,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:10:50" (2/4) ... [2021-05-06 08:10:50,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54641084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:10:50, skipping insertion in model container [2021-05-06 08:10:50,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:10:50" (3/4) ... [2021-05-06 08:10:50,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54641084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:10:50, skipping insertion in model container [2021-05-06 08:10:50,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:10:50" (4/4) ... [2021-05-06 08:10:50,761 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound5.cJordan [2021-05-06 08:10:50,765 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:10:50,767 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:10:50,779 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:10:50,825 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:10:50,826 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:10:50,826 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:10:50,826 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:10:50,826 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:10:50,826 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:10:50,826 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:10:50,826 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:10:50,849 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 08:10:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:10:50,855 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:50,855 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 08:10:50,856 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2021-05-06 08:10:50,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:50,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201178466] [2021-05-06 08:10:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:51,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:10:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:51,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:10:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:51,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:10:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:51,032 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 08:10:51,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:51,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201178466] [2021-05-06 08:10:51,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201178466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:10:51,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:10:51,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:10:51,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96451534] [2021-05-06 08:10:51,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:10:51,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:51,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:10:51,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:10:51,050 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 08:10:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:51,178 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-06 08:10:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:10:51,180 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 08:10:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:51,188 INFO L225 Difference]: With dead ends: 36 [2021-05-06 08:10:51,188 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 08:10:51,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:10:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 08:10:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 08:10:51,220 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 08:10:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 08:10:51,223 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 08:10:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:51,225 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 08:10:51,225 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 08:10:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 08:10:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:10:51,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:51,227 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 08:10:51,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:10:51,227 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2021-05-06 08:10:51,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:51,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412330868] [2021-05-06 08:10:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:51,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:10:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:51,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:10:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:51,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:10:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:51,402 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 08:10:51,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412330868] [2021-05-06 08:10:51,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412330868] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:10:51,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:10:51,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:10:51,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043164213] [2021-05-06 08:10:51,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:10:51,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:51,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:10:51,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:10:51,410 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 08:10:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:51,551 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-06 08:10:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:10:51,551 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 08:10:51,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:51,553 INFO L225 Difference]: With dead ends: 32 [2021-05-06 08:10:51,554 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:10:51,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:10:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:10:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:10:51,563 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 08:10:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:10:51,567 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 08:10:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:51,568 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:10:51,568 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 08:10:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:10:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:10:51,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:51,572 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 08:10:51,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:10:51,575 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:51,576 INFO L82 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2021-05-06 08:10:51,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:51,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147838225] [2021-05-06 08:10:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:51,593 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:51,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057041228] [2021-05-06 08:10:51,593 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 08:10:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:51,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:10:51,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:51,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:51,813 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 08:10:51,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:51,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147838225] [2021-05-06 08:10:51,814 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:51,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057041228] [2021-05-06 08:10:51,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057041228] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:10:51,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:10:51,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:10:51,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669691635] [2021-05-06 08:10:51,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:10:51,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:10:51,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:10:51,818 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 08:10:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:51,862 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-05-06 08:10:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:10:51,863 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 08:10:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:51,866 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:10:51,866 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:10:51,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:10:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:10:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 08:10:51,878 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 08:10:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 08:10:51,880 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 08:10:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:51,880 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 08:10:51,880 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 08:10:51,881 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 08:10:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:10:51,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:51,882 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 08:10:52,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:10:52,103 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:52,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2021-05-06 08:10:52,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:52,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145379223] [2021-05-06 08:10:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:52,121 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:52,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953918921] [2021-05-06 08:10:52,122 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 08:10:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:10:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:52,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:52,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:52,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:52,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:52,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:52,285 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 08:10:52,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:52,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145379223] [2021-05-06 08:10:52,286 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:52,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953918921] [2021-05-06 08:10:52,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953918921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:10:52,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:10:52,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:10:52,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639682292] [2021-05-06 08:10:52,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:10:52,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:10:52,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:10:52,287 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 08:10:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:52,364 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2021-05-06 08:10:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:10:52,364 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 08:10:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:52,367 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:10:52,367 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:10:52,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:10:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:10:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 08:10:52,372 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 08:10:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 08:10:52,373 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 08:10:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:52,373 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 08:10:52,374 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 08:10:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 08:10:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:10:52,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:52,374 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 08:10:52,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:10:52,593 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:52,593 INFO L82 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2021-05-06 08:10:52,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:52,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367456390] [2021-05-06 08:10:52,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:52,603 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:52,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031173597] [2021-05-06 08:10:52,603 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 08:10:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:10:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:52,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:52,718 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 08:10:52,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:52,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367456390] [2021-05-06 08:10:52,718 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:52,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031173597] [2021-05-06 08:10:52,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031173597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:10:52,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:10:52,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:10:52,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116024974] [2021-05-06 08:10:52,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:10:52,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:52,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:10:52,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:10:52,720 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 08:10:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:52,752 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-05-06 08:10:52,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:10:52,753 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 08:10:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:52,753 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:10:52,753 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:10:52,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:10:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:10:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:10:52,758 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 08:10:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 08:10:52,759 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 08:10:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:52,759 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 08:10:52,759 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 08:10:52,759 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 08:10:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:10:52,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:52,760 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 08:10:52,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:10:52,980 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2021-05-06 08:10:52,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:52,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242327489] [2021-05-06 08:10:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:52,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:52,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788813993] [2021-05-06 08:10:52,988 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 08:10:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:53,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:10:53,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:53,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:53,133 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 08:10:53,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:53,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242327489] [2021-05-06 08:10:53,133 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:53,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788813993] [2021-05-06 08:10:53,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788813993] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:10:53,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:10:53,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:10:53,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323111542] [2021-05-06 08:10:53,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:10:53,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:53,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:10:53,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:10:53,135 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 08:10:53,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:53,173 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-05-06 08:10:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:10:53,174 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 08:10:53,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:53,175 INFO L225 Difference]: With dead ends: 75 [2021-05-06 08:10:53,175 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 08:10:53,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:10:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 08:10:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 08:10:53,180 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 08:10:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 08:10:53,181 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 08:10:53,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:53,181 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 08:10:53,181 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 08:10:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 08:10:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:10:53,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:53,182 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 08:10:53,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:10:53,403 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:53,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2021-05-06 08:10:53,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:53,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864998044] [2021-05-06 08:10:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:53,410 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:53,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230667098] [2021-05-06 08:10:53,410 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 08:10:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:53,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:10:53,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:53,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:53,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:53,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:53,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:53,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:53,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:53,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:53,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:53,568 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 08:10:53,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:53,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864998044] [2021-05-06 08:10:53,569 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:53,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230667098] [2021-05-06 08:10:53,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230667098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:53,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:53,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:10:53,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981665272] [2021-05-06 08:10:53,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:10:53,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:53,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:10:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:10:53,570 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 08:10:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:53,626 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-05-06 08:10:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:10:53,627 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 08:10:53,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:53,628 INFO L225 Difference]: With dead ends: 99 [2021-05-06 08:10:53,628 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 08:10:53,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:10:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 08:10:53,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 08:10:53,633 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 08:10:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 08:10:53,634 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 08:10:53,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:53,634 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 08:10:53,634 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 08:10:53,634 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 08:10:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:10:53,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:53,635 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 08:10:53,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 08:10:53,857 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:53,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:53,857 INFO L82 PathProgramCache]: Analyzing trace with hash -739890515, now seen corresponding path program 1 times [2021-05-06 08:10:53,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:53,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085227330] [2021-05-06 08:10:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:53,864 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:53,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111983515] [2021-05-06 08:10:53,865 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 08:10:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:53,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:10:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:53,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:53,999 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 08:10:54,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:54,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085227330] [2021-05-06 08:10:54,000 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:54,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111983515] [2021-05-06 08:10:54,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111983515] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:10:54,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:10:54,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:10:54,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583510960] [2021-05-06 08:10:54,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:10:54,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:54,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:10:54,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:10:54,001 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 08:10:54,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:54,035 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-05-06 08:10:54,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:10:54,035 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 08:10:54,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:54,036 INFO L225 Difference]: With dead ends: 104 [2021-05-06 08:10:54,036 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 08:10:54,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:10:54,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 08:10:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 08:10:54,041 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 08:10:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 08:10:54,042 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 08:10:54,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:54,042 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 08:10:54,043 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 08:10:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 08:10:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:10:54,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:54,043 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 08:10:54,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:10:54,265 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:54,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2021-05-06 08:10:54,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:54,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373802220] [2021-05-06 08:10:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:54,271 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:54,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073751429] [2021-05-06 08:10:54,272 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 08:10:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:54,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:10:54,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:54,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:54,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:54,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:54,531 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 08:10:54,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:54,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373802220] [2021-05-06 08:10:54,531 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:54,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073751429] [2021-05-06 08:10:54,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073751429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:54,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:54,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:10:54,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740143570] [2021-05-06 08:10:54,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:10:54,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:10:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:10:54,550 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 08:10:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:54,674 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-06 08:10:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:10:54,674 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 08:10:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:54,675 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:10:54,675 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:10:54,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:10:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:10:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 08:10:54,680 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 08:10:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 08:10:54,681 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 08:10:54,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:54,681 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 08:10:54,681 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 08:10:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 08:10:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:10:54,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:54,682 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 08:10:54,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:10:54,903 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:54,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 1 times [2021-05-06 08:10:54,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:54,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473133628] [2021-05-06 08:10:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:54,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:54,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132411399] [2021-05-06 08:10:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:10:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:10:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:55,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,133 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 08:10:55,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:55,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473133628] [2021-05-06 08:10:55,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:55,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132411399] [2021-05-06 08:10:55,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132411399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:55,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:55,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:10:55,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801338381] [2021-05-06 08:10:55,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:10:55,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:55,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:10:55,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:10:55,135 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 08:10:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:55,266 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2021-05-06 08:10:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:10:55,267 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 08:10:55,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:55,268 INFO L225 Difference]: With dead ends: 129 [2021-05-06 08:10:55,268 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 08:10:55,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:10:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 08:10:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 08:10:55,274 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 08:10:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 08:10:55,275 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 08:10:55,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:55,275 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 08:10:55,276 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 08:10:55,276 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 08:10:55,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:10:55,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:55,277 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 08:10:55,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:10:55,495 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:55,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1023588343, now seen corresponding path program 2 times [2021-05-06 08:10:55,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:55,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070825364] [2021-05-06 08:10:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:55,507 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:55,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201233737] [2021-05-06 08:10:55,507 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 08:10:55,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:10:55,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:10:55,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:10:55,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:55,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:55,698 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 08:10:55,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:55,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070825364] [2021-05-06 08:10:55,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:55,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201233737] [2021-05-06 08:10:55,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201233737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:55,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:55,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:10:55,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974585213] [2021-05-06 08:10:55,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:10:55,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:55,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:10:55,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:10:55,709 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 08:10:55,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:55,829 INFO L93 Difference]: Finished difference Result 149 states and 201 transitions. [2021-05-06 08:10:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:10:55,830 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 08:10:55,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:55,831 INFO L225 Difference]: With dead ends: 149 [2021-05-06 08:10:55,831 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 08:10:55,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:10:55,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 08:10:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 08:10:55,836 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 08:10:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 08:10:55,837 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 08:10:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:55,837 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 08:10:55,837 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 08:10:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 08:10:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:10:55,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:55,838 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 08:10:56,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:10:56,057 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1153573054, now seen corresponding path program 2 times [2021-05-06 08:10:56,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:56,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397363614] [2021-05-06 08:10:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:56,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:56,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046038563] [2021-05-06 08:10:56,077 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 08:10:56,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:10:56,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:10:56,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:10:56,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:56,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,219 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 08:10:56,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:56,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397363614] [2021-05-06 08:10:56,220 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:56,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046038563] [2021-05-06 08:10:56,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046038563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:56,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:56,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:10:56,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885083182] [2021-05-06 08:10:56,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:10:56,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:56,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:10:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:10:56,221 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 08:10:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:56,265 INFO L93 Difference]: Finished difference Result 173 states and 215 transitions. [2021-05-06 08:10:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:10:56,265 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 08:10:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:56,266 INFO L225 Difference]: With dead ends: 173 [2021-05-06 08:10:56,266 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 08:10:56,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:10:56,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 08:10:56,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 08:10:56,271 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 08:10:56,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-06 08:10:56,273 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-06 08:10:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:56,273 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-06 08:10:56,273 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 08:10:56,273 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-06 08:10:56,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:10:56,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:56,274 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 08:10:56,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:10:56,492 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash -264996897, now seen corresponding path program 1 times [2021-05-06 08:10:56,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:56,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176600642] [2021-05-06 08:10:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:56,498 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:56,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679994636] [2021-05-06 08:10:56,499 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 08:10:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:10:56,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:10:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:56,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:56,656 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 08:10:56,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:56,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176600642] [2021-05-06 08:10:56,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:56,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679994636] [2021-05-06 08:10:56,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679994636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:56,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:56,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:10:56,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816880436] [2021-05-06 08:10:56,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:10:56,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:56,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:10:56,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:10:56,657 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 08:10:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:56,751 INFO L93 Difference]: Finished difference Result 186 states and 235 transitions. [2021-05-06 08:10:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:10:56,752 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 08:10:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:56,753 INFO L225 Difference]: With dead ends: 186 [2021-05-06 08:10:56,753 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 08:10:56,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:10:56,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 08:10:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 08:10:56,758 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 08:10:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 08:10:56,759 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-06 08:10:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:56,759 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 08:10:56,759 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 08:10:56,759 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 08:10:56,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:10:56,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:56,759 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 08:10:56,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:10:56,977 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:56,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1121480771, now seen corresponding path program 2 times [2021-05-06 08:10:56,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:56,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506926792] [2021-05-06 08:10:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:56,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:56,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379978424] [2021-05-06 08:10:56,983 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 08:10:57,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:10:57,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:10:57,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:10:57,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:57,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,152 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 08:10:57,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:57,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506926792] [2021-05-06 08:10:57,152 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:57,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379978424] [2021-05-06 08:10:57,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379978424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:57,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:57,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:10:57,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252539620] [2021-05-06 08:10:57,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:10:57,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:10:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:10:57,154 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 08:10:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:57,225 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2021-05-06 08:10:57,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:10:57,225 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 08:10:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:57,226 INFO L225 Difference]: With dead ends: 196 [2021-05-06 08:10:57,226 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 08:10:57,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:10:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 08:10:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 08:10:57,231 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 08:10:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-06 08:10:57,233 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-06 08:10:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:57,233 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-06 08:10:57,233 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 08:10:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-06 08:10:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:10:57,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:57,234 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 08:10:57,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:10:57,454 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:57,455 INFO L82 PathProgramCache]: Analyzing trace with hash -718576292, now seen corresponding path program 2 times [2021-05-06 08:10:57,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:57,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280103014] [2021-05-06 08:10:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:57,461 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:57,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336185977] [2021-05-06 08:10:57,461 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 08:10:57,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:10:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:10:57,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:10:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:57,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:57,701 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 08:10:57,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:57,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280103014] [2021-05-06 08:10:57,702 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:57,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336185977] [2021-05-06 08:10:57,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336185977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:57,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:57,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:10:57,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607606842] [2021-05-06 08:10:57,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:10:57,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:10:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:10:57,716 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 08:10:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:57,938 INFO L93 Difference]: Finished difference Result 217 states and 279 transitions. [2021-05-06 08:10:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:10:57,939 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 08:10:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:57,940 INFO L225 Difference]: With dead ends: 217 [2021-05-06 08:10:57,940 INFO L226 Difference]: Without dead ends: 217 [2021-05-06 08:10:57,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:10:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-06 08:10:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-06 08:10:57,945 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 08:10:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-06 08:10:57,946 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-06 08:10:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:57,947 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-06 08:10:57,947 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 08:10:57,947 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-06 08:10:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:10:57,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:57,947 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 08:10:58,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:10:58,166 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:58,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:58,166 INFO L82 PathProgramCache]: Analyzing trace with hash -367776355, now seen corresponding path program 3 times [2021-05-06 08:10:58,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:58,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173969539] [2021-05-06 08:10:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:58,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:58,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241124966] [2021-05-06 08:10:58,171 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 08:10:58,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:10:58,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:10:58,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:10:58,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:58,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,380 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 08:10:58,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:58,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173969539] [2021-05-06 08:10:58,380 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:58,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241124966] [2021-05-06 08:10:58,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241124966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:58,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:58,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:10:58,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865477154] [2021-05-06 08:10:58,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:10:58,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:58,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:10:58,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:10:58,381 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 08:10:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:58,481 INFO L93 Difference]: Finished difference Result 233 states and 300 transitions. [2021-05-06 08:10:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:10:58,482 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 08:10:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:58,483 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:10:58,483 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:10:58,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:10:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:10:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-06 08:10:58,488 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 08:10:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-06 08:10:58,489 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-06 08:10:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:58,489 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-06 08:10:58,489 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 08:10:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-06 08:10:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:10:58,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:58,490 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 08:10:58,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:10:58,708 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:58,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash 876232379, now seen corresponding path program 4 times [2021-05-06 08:10:58,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:58,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864952429] [2021-05-06 08:10:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:58,713 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:58,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917962726] [2021-05-06 08:10:58,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:10:58,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:10:58,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:10:58,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 08:10:58,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:58,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:58,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:59,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:59,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:59,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:59,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:59,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:59,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:59,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 47 proven. 25 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-05-06 08:10:59,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:59,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864952429] [2021-05-06 08:10:59,088 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:59,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917962726] [2021-05-06 08:10:59,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917962726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:59,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:59,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:10:59,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497070139] [2021-05-06 08:10:59,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:10:59,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:59,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:10:59,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:10:59,092 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:10:59,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:10:59,392 INFO L93 Difference]: Finished difference Result 240 states and 308 transitions. [2021-05-06 08:10:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:10:59,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 08:10:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:10:59,397 INFO L225 Difference]: With dead ends: 240 [2021-05-06 08:10:59,397 INFO L226 Difference]: Without dead ends: 235 [2021-05-06 08:10:59,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:10:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-06 08:10:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-06 08:10:59,406 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 08:10:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-06 08:10:59,407 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-06 08:10:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:10:59,407 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-06 08:10:59,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:10:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-06 08:10:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:10:59,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:10:59,409 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 08:10:59,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:10:59,623 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:10:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:10:59,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1468434662, now seen corresponding path program 3 times [2021-05-06 08:10:59,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:10:59,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641254373] [2021-05-06 08:10:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:10:59,629 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:10:59,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476648558] [2021-05-06 08:10:59,629 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 08:10:59,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:10:59,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:10:59,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:10:59,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:10:59,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:10:59,845 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 08:10:59,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:10:59,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641254373] [2021-05-06 08:10:59,845 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:10:59,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476648558] [2021-05-06 08:10:59,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476648558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:10:59,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:10:59,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:10:59,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440589601] [2021-05-06 08:10:59,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:10:59,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:10:59,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:10:59,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:10:59,847 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 08:11:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:00,124 INFO L93 Difference]: Finished difference Result 227 states and 290 transitions. [2021-05-06 08:11:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:11:00,124 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 08:11:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:00,125 INFO L225 Difference]: With dead ends: 227 [2021-05-06 08:11:00,125 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 08:11:00,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:11:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 08:11:00,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-05-06 08:11:00,130 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 08:11:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2021-05-06 08:11:00,131 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 271 transitions. Word has length 71 [2021-05-06 08:11:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:00,132 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 271 transitions. [2021-05-06 08:11:00,132 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 08:11:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 271 transitions. [2021-05-06 08:11:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:11:00,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:00,133 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 08:11:00,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:11:00,351 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:00,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1531334864, now seen corresponding path program 3 times [2021-05-06 08:11:00,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:00,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488307433] [2021-05-06 08:11:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:00,357 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:00,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986692134] [2021-05-06 08:11:00,357 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 08:11:00,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:11:00,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:11:00,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:11:00,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:00,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:00,512 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 08:11:00,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:00,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488307433] [2021-05-06 08:11:00,512 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:00,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986692134] [2021-05-06 08:11:00,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986692134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:11:00,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:11:00,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:11:00,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849503555] [2021-05-06 08:11:00,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:11:00,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:00,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:11:00,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:11:00,513 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 08:11:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:00,569 INFO L93 Difference]: Finished difference Result 243 states and 293 transitions. [2021-05-06 08:11:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:11:00,570 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 08:11:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:00,571 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:11:00,571 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 08:11:00,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:11:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 08:11:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-06 08:11:00,575 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 08:11:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-06 08:11:00,576 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-06 08:11:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:00,576 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-06 08:11:00,576 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 08:11:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-06 08:11:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:11:00,577 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:00,577 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 08:11:00,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:11:00,795 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:00,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:00,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1875056275, now seen corresponding path program 5 times [2021-05-06 08:11:00,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:00,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578256970] [2021-05-06 08:11:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:00,801 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:00,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342237493] [2021-05-06 08:11:00,801 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 08:11:01,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:11:01,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:11:01,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:11:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:01,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:01,303 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 08:11:01,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:01,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578256970] [2021-05-06 08:11:01,304 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:01,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342237493] [2021-05-06 08:11:01,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342237493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:11:01,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:11:01,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:11:01,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240194783] [2021-05-06 08:11:01,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:11:01,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:01,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:11:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:11:01,305 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 08:11:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:01,360 INFO L93 Difference]: Finished difference Result 264 states and 326 transitions. [2021-05-06 08:11:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:11:01,361 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 08:11:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:01,362 INFO L225 Difference]: With dead ends: 264 [2021-05-06 08:11:01,362 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 08:11:01,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:11:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 08:11:01,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-06 08:11:01,366 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 08:11:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-06 08:11:01,367 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-06 08:11:01,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:01,369 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-06 08:11:01,369 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 08:11:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-06 08:11:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:11:01,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:01,370 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 08:11:01,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:11:01,577 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1563427147, now seen corresponding path program 6 times [2021-05-06 08:11:01,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:01,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726361342] [2021-05-06 08:11:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:01,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:01,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909027171] [2021-05-06 08:11:01,587 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 08:11:01,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 08:11:01,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:11:01,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:11:01,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:01,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:01,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:01,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:01,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:01,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:01,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:01,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:01,792 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 08:11:01,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:01,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726361342] [2021-05-06 08:11:01,794 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:01,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909027171] [2021-05-06 08:11:01,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909027171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:11:01,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:11:01,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:11:01,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741676310] [2021-05-06 08:11:01,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:11:01,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:11:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:11:01,796 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 08:11:01,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:01,861 INFO L93 Difference]: Finished difference Result 254 states and 310 transitions. [2021-05-06 08:11:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:11:01,862 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 08:11:01,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:01,863 INFO L225 Difference]: With dead ends: 254 [2021-05-06 08:11:01,863 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 08:11:01,863 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 08:11:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 08:11:01,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2021-05-06 08:11:01,867 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 08:11:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2021-05-06 08:11:01,868 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 80 [2021-05-06 08:11:01,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:01,868 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2021-05-06 08:11:01,869 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 08:11:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2021-05-06 08:11:01,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:11:01,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:01,869 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 08:11:02,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:11:02,085 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:02,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1072579442, now seen corresponding path program 3 times [2021-05-06 08:11:02,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:02,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933690329] [2021-05-06 08:11:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:02,090 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:02,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333039765] [2021-05-06 08:11:02,090 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 08:11:02,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:11:02,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:11:02,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:11:02,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:02,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:02,358 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 08:11:02,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:02,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933690329] [2021-05-06 08:11:02,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:02,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333039765] [2021-05-06 08:11:02,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333039765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:11:02,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:11:02,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:11:02,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350809487] [2021-05-06 08:11:02,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:11:02,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:11:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:11:02,359 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 08:11:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:02,826 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2021-05-06 08:11:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:11:02,829 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 08:11:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:02,830 INFO L225 Difference]: With dead ends: 284 [2021-05-06 08:11:02,830 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 08:11:02,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:11:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 08:11:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-05-06 08:11:02,836 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 08:11:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-06 08:11:02,839 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 85 [2021-05-06 08:11:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:02,839 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-06 08:11:02,839 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 08:11:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-06 08:11:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:11:02,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:02,840 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 08:11:03,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:11:03,058 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:03,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:03,059 INFO L82 PathProgramCache]: Analyzing trace with hash -721779505, now seen corresponding path program 7 times [2021-05-06 08:11:03,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:03,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010479980] [2021-05-06 08:11:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:03,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:03,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115187269] [2021-05-06 08:11:03,065 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 08:11:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:11:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 08:11:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:03,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:03,372 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 08:11:03,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:03,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010479980] [2021-05-06 08:11:03,373 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:03,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115187269] [2021-05-06 08:11:03,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115187269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:11:03,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:11:03,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:11:03,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457095735] [2021-05-06 08:11:03,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:11:03,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:03,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:11:03,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:11:03,374 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 08:11:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:03,929 INFO L93 Difference]: Finished difference Result 306 states and 374 transitions. [2021-05-06 08:11:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:11:03,930 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 08:11:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:03,931 INFO L225 Difference]: With dead ends: 306 [2021-05-06 08:11:03,931 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 08:11:03,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:11:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 08:11:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2021-05-06 08:11:03,937 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 08:11:03,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 365 transitions. [2021-05-06 08:11:03,938 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 365 transitions. Word has length 85 [2021-05-06 08:11:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:03,938 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 365 transitions. [2021-05-06 08:11:03,938 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 08:11:03,938 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 365 transitions. [2021-05-06 08:11:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:11:03,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:03,939 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 08:11:04,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:11:04,157 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:04,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:04,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1313119571, now seen corresponding path program 8 times [2021-05-06 08:11:04,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:04,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314816536] [2021-05-06 08:11:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:04,164 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:04,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294025818] [2021-05-06 08:11:04,164 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 08:11:04,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:11:04,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:11:04,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 08:11:04,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:04,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:04,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:04,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:04,450 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 08:11:04,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314816536] [2021-05-06 08:11:04,450 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294025818] [2021-05-06 08:11:04,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294025818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:11:04,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:11:04,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:11:04,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704597995] [2021-05-06 08:11:04,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:11:04,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:04,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:11:04,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:11:04,452 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 08:11:05,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:05,242 INFO L93 Difference]: Finished difference Result 328 states and 404 transitions. [2021-05-06 08:11:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:11:05,242 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 08:11:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:05,244 INFO L225 Difference]: With dead ends: 328 [2021-05-06 08:11:05,244 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 08:11:05,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:11:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 08:11:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2021-05-06 08:11:05,250 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 08:11:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2021-05-06 08:11:05,251 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 85 [2021-05-06 08:11:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:05,252 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2021-05-06 08:11:05,252 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 08:11:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2021-05-06 08:11:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:11:05,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:05,252 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 08:11:05,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:11:05,465 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash -962319634, now seen corresponding path program 9 times [2021-05-06 08:11:05,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:05,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594480439] [2021-05-06 08:11:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:05,473 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:05,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378476782] [2021-05-06 08:11:05,473 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 08:11:05,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:11:05,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:11:05,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 08:11:05,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:05,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:05,760 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 08:11:05,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:05,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594480439] [2021-05-06 08:11:05,761 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:05,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378476782] [2021-05-06 08:11:05,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378476782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:11:05,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:11:05,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:11:05,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487036074] [2021-05-06 08:11:05,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:11:05,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:05,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:11:05,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:11:05,765 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 08:11:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:06,228 INFO L93 Difference]: Finished difference Result 344 states and 439 transitions. [2021-05-06 08:11:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:11:06,229 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 08:11:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:06,230 INFO L225 Difference]: With dead ends: 344 [2021-05-06 08:11:06,230 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 08:11:06,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:11:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 08:11:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 298. [2021-05-06 08:11:06,237 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 08:11:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2021-05-06 08:11:06,238 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 85 [2021-05-06 08:11:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:06,238 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2021-05-06 08:11:06,238 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 08:11:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2021-05-06 08:11:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:11:06,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:06,239 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 08:11:06,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:11:06,457 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:06,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:06,457 INFO L82 PathProgramCache]: Analyzing trace with hash -201025847, now seen corresponding path program 10 times [2021-05-06 08:11:06,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:06,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406534984] [2021-05-06 08:11:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:06,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:06,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843362210] [2021-05-06 08:11:06,462 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 08:11:06,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:11:06,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:11:06,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 08:11:06,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:06,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 27 proven. 61 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-05-06 08:11:06,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:06,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406534984] [2021-05-06 08:11:06,729 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:06,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843362210] [2021-05-06 08:11:06,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843362210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:11:06,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:11:06,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:11:06,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844551185] [2021-05-06 08:11:06,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:11:06,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:06,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:11:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:11:06,733 INFO L87 Difference]: Start difference. First operand 298 states and 364 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:11:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:07,305 INFO L93 Difference]: Finished difference Result 323 states and 407 transitions. [2021-05-06 08:11:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:11:07,305 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 08:11:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:07,307 INFO L225 Difference]: With dead ends: 323 [2021-05-06 08:11:07,307 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 08:11:07,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:11:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 08:11:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-05-06 08:11:07,312 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 08:11:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 388 transitions. [2021-05-06 08:11:07,313 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 388 transitions. Word has length 90 [2021-05-06 08:11:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:07,314 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 388 transitions. [2021-05-06 08:11:07,314 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:11:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 388 transitions. [2021-05-06 08:11:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:11:07,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:07,314 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 08:11:07,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:11:07,528 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1749274408, now seen corresponding path program 11 times [2021-05-06 08:11:07,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:07,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175372794] [2021-05-06 08:11:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:07,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:07,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8554416] [2021-05-06 08:11:07,538 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 08:11:08,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:11:08,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:11:08,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:11:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:08,966 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 08:11:08,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:08,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175372794] [2021-05-06 08:11:08,967 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:08,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8554416] [2021-05-06 08:11:08,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8554416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:11:08,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:11:08,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:11:08,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307802773] [2021-05-06 08:11:08,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:11:08,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:08,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:11:08,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:11:08,968 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 08:11:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:11:09,421 INFO L93 Difference]: Finished difference Result 357 states and 447 transitions. [2021-05-06 08:11:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:11:09,422 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 08:11:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:11:09,423 INFO L225 Difference]: With dead ends: 357 [2021-05-06 08:11:09,423 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 08:11:09,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:11:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 08:11:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 337. [2021-05-06 08:11:09,429 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 08:11:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 414 transitions. [2021-05-06 08:11:09,430 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 414 transitions. Word has length 90 [2021-05-06 08:11:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:11:09,430 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 414 transitions. [2021-05-06 08:11:09,430 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 08:11:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 414 transitions. [2021-05-06 08:11:09,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 08:11:09,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:11:09,431 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 08:11:09,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:11:09,639 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:11:09,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:11:09,639 INFO L82 PathProgramCache]: Analyzing trace with hash 492366858, now seen corresponding path program 12 times [2021-05-06 08:11:09,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:11:09,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849727376] [2021-05-06 08:11:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:11:09,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:11:09,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744642642] [2021-05-06 08:11:09,644 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 08:11:09,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:11:09,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:11:09,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:11:09,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:11:09,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:09,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:09,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:09,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:16,287 WARN L205 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-06 08:11:16,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:16,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:16,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:11:16,369 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 08:11:16,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:11:16,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849727376] [2021-05-06 08:11:16,370 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:11:16,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744642642] [2021-05-06 08:11:16,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744642642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:11:16,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:11:16,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:11:16,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315219524] [2021-05-06 08:11:16,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:11:16,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:11:16,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:11:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=88, Unknown=1, NotChecked=0, Total=110 [2021-05-06 08:11:16,371 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 08:11:47,889 WARN L205 SmtUtils]: Spent 21.50 s on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-06 08:17:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:56,483 INFO L93 Difference]: Finished difference Result 399 states and 510 transitions. [2021-05-06 08:17:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:17:56,484 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 08:17:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:56,485 INFO L225 Difference]: With dead ends: 399 [2021-05-06 08:17:56,485 INFO L226 Difference]: Without dead ends: 383 [2021-05-06 08:17:56,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 28142.9ms TimeCoverageRelationStatistics Valid=36, Invalid=145, Unknown=1, NotChecked=0, Total=182 [2021-05-06 08:17:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-06 08:17:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2021-05-06 08:17:56,492 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 08:17:56,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 467 transitions. [2021-05-06 08:17:56,493 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 467 transitions. Word has length 90 [2021-05-06 08:17:56,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:56,493 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 467 transitions. [2021-05-06 08:17:56,493 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 08:17:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 467 transitions. [2021-05-06 08:17:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:17:56,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:56,494 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 08:17:56,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:17:56,695 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1503864962, now seen corresponding path program 4 times [2021-05-06 08:17:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:56,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499215655] [2021-05-06 08:17:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:56,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:56,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189563107] [2021-05-06 08:17:56,703 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 08:17:56,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:56,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:17:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:56,945 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 08:17:56,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:56,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499215655] [2021-05-06 08:17:56,945 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:56,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189563107] [2021-05-06 08:17:56,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189563107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:56,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:56,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:17:56,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945250949] [2021-05-06 08:17:56,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:17:56,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:56,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:17:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:56,947 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 08:17:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:57,047 INFO L93 Difference]: Finished difference Result 460 states and 546 transitions. [2021-05-06 08:17:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:57,048 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 08:17:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:57,050 INFO L225 Difference]: With dead ends: 460 [2021-05-06 08:17:57,050 INFO L226 Difference]: Without dead ends: 460 [2021-05-06 08:17:57,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-06 08:17:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-05-06 08:17:57,058 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 08:17:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 509 transitions. [2021-05-06 08:17:57,059 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 509 transitions. Word has length 99 [2021-05-06 08:17:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:57,059 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 509 transitions. [2021-05-06 08:17:57,059 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 08:17:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 509 transitions. [2021-05-06 08:17:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:17:57,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:57,060 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 08:17:57,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:17:57,277 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:57,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:57,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1826743324, now seen corresponding path program 4 times [2021-05-06 08:17:57,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:57,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409371019] [2021-05-06 08:17:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:57,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:57,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812084087] [2021-05-06 08:17:57,283 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 08:17:57,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:57,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:57,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 08:17:57,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:57,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 70 proven. 122 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-05-06 08:17:57,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:57,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409371019] [2021-05-06 08:17:57,783 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:57,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812084087] [2021-05-06 08:17:57,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812084087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:57,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:57,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:57,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317331651] [2021-05-06 08:17:57,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:57,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:57,785 INFO L87 Difference]: Start difference. First operand 432 states and 509 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 08:17:58,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:58,576 INFO L93 Difference]: Finished difference Result 467 states and 565 transitions. [2021-05-06 08:17:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2021-05-06 08:17:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:58,578 INFO L225 Difference]: With dead ends: 467 [2021-05-06 08:17:58,578 INFO L226 Difference]: Without dead ends: 467 [2021-05-06 08:17:58,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:17:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-06 08:17:58,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 443. [2021-05-06 08:17:58,586 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 08:17:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 524 transitions. [2021-05-06 08:17:58,587 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 524 transitions. Word has length 104 [2021-05-06 08:17:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:58,587 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 524 transitions. [2021-05-06 08:17:58,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 08:17:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 524 transitions. [2021-05-06 08:17:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:17:58,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:58,588 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 08:17:58,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:58,807 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:58,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2117424035, now seen corresponding path program 13 times [2021-05-06 08:17:58,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:58,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26113858] [2021-05-06 08:17:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:58,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:58,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505153572] [2021-05-06 08:17:58,820 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 08:17:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:58,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 08:17:58,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:59,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,211 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 08:17:59,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:59,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26113858] [2021-05-06 08:17:59,211 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:59,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505153572] [2021-05-06 08:17:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505153572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:59,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:59,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:17:59,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653644702] [2021-05-06 08:17:59,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:17:59,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:59,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:17:59,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:17:59,213 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 08:17:59,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:59,555 INFO L93 Difference]: Finished difference Result 470 states and 563 transitions. [2021-05-06 08:17:59,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:17:59,556 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 08:17:59,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:59,557 INFO L225 Difference]: With dead ends: 470 [2021-05-06 08:17:59,557 INFO L226 Difference]: Without dead ends: 470 [2021-05-06 08:17:59,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:17:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-06 08:17:59,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 454. [2021-05-06 08:17:59,565 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 08:17:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2021-05-06 08:17:59,566 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 104 [2021-05-06 08:17:59,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:59,566 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2021-05-06 08:17:59,566 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 08:17:59,566 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2021-05-06 08:17:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:17:59,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:59,567 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 08:17:59,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:17:59,785 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:59,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1586203195, now seen corresponding path program 14 times [2021-05-06 08:17:59,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:59,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61892169] [2021-05-06 08:17:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:59,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:59,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656750570] [2021-05-06 08:17:59,796 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 08:17:59,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:59,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:59,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:17:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:00,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,148 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 08:18:00,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:00,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61892169] [2021-05-06 08:18:00,148 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:00,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656750570] [2021-05-06 08:18:00,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656750570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:00,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:00,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:18:00,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960892742] [2021-05-06 08:18:00,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:18:00,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:00,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:18:00,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:18:00,151 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 08:18:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:00,882 INFO L93 Difference]: Finished difference Result 495 states and 589 transitions. [2021-05-06 08:18:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:18:00,882 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 08:18:00,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:00,884 INFO L225 Difference]: With dead ends: 495 [2021-05-06 08:18:00,884 INFO L226 Difference]: Without dead ends: 495 [2021-05-06 08:18:00,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:18:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-06 08:18:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 460. [2021-05-06 08:18:00,891 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 08:18:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 541 transitions. [2021-05-06 08:18:00,892 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 541 transitions. Word has length 104 [2021-05-06 08:18:00,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:00,892 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 541 transitions. [2021-05-06 08:18:00,892 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 08:18:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 541 transitions. [2021-05-06 08:18:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:18:00,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:00,894 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 08:18:01,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:01,111 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:01,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1937003132, now seen corresponding path program 15 times [2021-05-06 08:18:01,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:01,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543126888] [2021-05-06 08:18:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:01,122 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:01,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125227461] [2021-05-06 08:18:01,122 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 08:18:01,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:18:01,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:01,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:18:01,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:01,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:02,357 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-06 08:18:02,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:02,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:13,570 WARN L205 SmtUtils]: Spent 7.38 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-06 08:18:14,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:14,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:21:27,644 WARN L159 QuantifierPusher]: Ignoring assumption.