/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:26:27,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:26:27,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:26:27,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:26:27,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:26:27,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:26:27,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:26:27,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:26:27,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:26:27,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:26:27,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:26:27,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:26:27,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:26:27,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:26:27,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:26:27,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:26:27,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:26:27,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:26:27,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:26:27,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:26:27,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:26:27,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:26:27,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:26:27,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:26:27,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 20:26:27,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 20:26:27,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 20:26:27,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 20:26:27,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 20:26:27,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 20:26:27,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 20:26:27,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 20:26:27,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 20:26:27,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 20:26:27,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 20:26:27,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 20:26:27,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 20:26:27,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 20:26:27,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:26:27,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:26:27,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:26:27,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:26:27,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:26:27,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:26:27,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:26:27,812 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:26:27,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:26:27,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:26:27,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:26:27,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:26:27,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:26:27,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:26:27,814 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:26:27,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:26:27,814 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:26:27,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:26:27,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:26:27,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:26:27,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:26:27,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:26:27,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:26:27,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:26:27,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:26:27,816 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:26:27,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:26:28,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:26:28,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:26:28,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:26:28,121 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:26:28,122 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:26:28,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2021-05-02 20:26:28,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3726bb93/ed4dc26d6e1643c6a066bb3c8f4165ae/FLAG95a329289 [2021-05-02 20:26:28,542 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:26:28,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2021-05-02 20:26:28,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3726bb93/ed4dc26d6e1643c6a066bb3c8f4165ae/FLAG95a329289 [2021-05-02 20:26:28,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3726bb93/ed4dc26d6e1643c6a066bb3c8f4165ae [2021-05-02 20:26:28,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:26:28,941 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:26:28,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:26:28,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:26:28,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:26:28,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:26:28" (1/1) ... [2021-05-02 20:26:28,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@346ca546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:28, skipping insertion in model container [2021-05-02 20:26:28,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:26:28" (1/1) ... [2021-05-02 20:26:28,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:26:28,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:26:29,074 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2021-05-02 20:26:29,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:26:29,120 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:26:29,137 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2021-05-02 20:26:29,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:26:29,177 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:26:29,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:29 WrapperNode [2021-05-02 20:26:29,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:26:29,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:26:29,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:26:29,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:26:29,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:29" (1/1) ... [2021-05-02 20:26:29,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:29" (1/1) ... [2021-05-02 20:26:29,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:29" (1/1) ... [2021-05-02 20:26:29,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:29" (1/1) ... [2021-05-02 20:26:29,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:29" (1/1) ... [2021-05-02 20:26:29,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:29" (1/1) ... [2021-05-02 20:26:29,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:29" (1/1) ... [2021-05-02 20:26:29,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:26:29,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:26:29,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:26:29,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:26:29,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:29" (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 [2021-05-02 20:26:29,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:26:29,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:26:29,290 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:26:29,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:26:29,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:26:29,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:26:29,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:26:29,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:26:29,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:26:29,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:26:29,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:26:29,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:26:29,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:26:29,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:26:29,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:26:29,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:26:29,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:26:29,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:26:29,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:26:29,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:26:29,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:26:29,596 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:26:29,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:26:29 BoogieIcfgContainer [2021-05-02 20:26:29,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:26:29,598 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:26:29,598 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:26:29,598 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:26:29,601 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:26:29" (1/1) ... [2021-05-02 20:26:29,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:26:29 BasicIcfg [2021-05-02 20:26:29,615 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:26:29,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:26:29,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:26:29,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:26:29,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:26:28" (1/4) ... [2021-05-02 20:26:29,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24392d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:26:29, skipping insertion in model container [2021-05-02 20:26:29,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:26:29" (2/4) ... [2021-05-02 20:26:29,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24392d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:26:29, skipping insertion in model container [2021-05-02 20:26:29,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:26:29" (3/4) ... [2021-05-02 20:26:29,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24392d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:26:29, skipping insertion in model container [2021-05-02 20:26:29,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:26:29" (4/4) ... [2021-05-02 20:26:29,621 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.cJordan [2021-05-02 20:26:29,625 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:26:29,628 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:26:29,643 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:26:29,665 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:26:29,665 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:26:29,665 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:26:29,665 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:26:29,666 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:26:29,666 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:26:29,666 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:26:29,666 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:26:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:26:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:26:29,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:29,694 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-02 20:26:29,695 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:29,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-02 20:26:29,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:29,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548983128] [2021-05-02 20:26:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:29,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:26:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:29,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:26:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:30,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:26:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:30,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:26:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:30,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:26:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:30,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 20:26:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:30,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 20:26:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:26:30,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548983128] [2021-05-02 20:26:30,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548983128] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:26:30,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:26:30,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:26:30,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203717023] [2021-05-02 20:26:30,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:26:30,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:30,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:26:30,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:26:30,075 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:26:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:30,233 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-02 20:26:30,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:26:30,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 20:26:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:30,244 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:26:30,245 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:26:30,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:26:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:26:30,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:26:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:26:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 20:26:30,287 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 20:26:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:30,289 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 20:26:30,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:26:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 20:26:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:26:30,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:30,291 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:30,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:26:30,292 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:30,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-02 20:26:30,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:30,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806723263] [2021-05-02 20:26:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:30,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:30,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737022411] [2021-05-02 20:26:30,327 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 [2021-05-02 20:26:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:26:30,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:30,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:30,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:30,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:30,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:30,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 20:26:30,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:30,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806723263] [2021-05-02 20:26:30,619 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:30,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737022411] [2021-05-02 20:26:30,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737022411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:30,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:30,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:26:30,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508439471] [2021-05-02 20:26:30,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:26:30,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:30,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:26:30,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:26:30,622 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:26:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:30,804 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-02 20:26:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:26:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-02 20:26:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:30,808 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:26:30,808 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:26:30,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:26:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:26:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:26:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:26:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 20:26:30,816 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 20:26:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:30,816 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 20:26:30,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:26:30,816 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 20:26:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:26:30,817 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:30,818 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:31,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:26:31,042 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-02 20:26:31,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:31,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751296398] [2021-05-02 20:26:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:31,068 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:31,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423680993] [2021-05-02 20:26:31,068 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 [2021-05-02 20:26:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:26:31,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:31,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:26:31,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:31,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751296398] [2021-05-02 20:26:31,333 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:31,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423680993] [2021-05-02 20:26:31,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423680993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:31,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:31,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:26:31,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121183271] [2021-05-02 20:26:31,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:26:31,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:26:31,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:26:31,337 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:26:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:31,518 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-02 20:26:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:26:31,519 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-02 20:26:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:31,523 INFO L225 Difference]: With dead ends: 55 [2021-05-02 20:26:31,523 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:26:31,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:26:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:26:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 20:26:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:26:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 20:26:31,544 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 20:26:31,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:31,544 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 20:26:31,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:26:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 20:26:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:26:31,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:31,547 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:31,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:31,769 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:31,770 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-02 20:26:31,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:31,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211258152] [2021-05-02 20:26:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:31,781 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:31,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696819093] [2021-05-02 20:26:31,782 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 [2021-05-02 20:26:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:31,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:26:31,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:31,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:31,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:26:32,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:32,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211258152] [2021-05-02 20:26:32,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:32,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696819093] [2021-05-02 20:26:32,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696819093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:32,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:32,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:26:32,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495196304] [2021-05-02 20:26:32,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:26:32,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:32,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:26:32,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:26:32,054 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:26:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:32,189 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-02 20:26:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:26:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 20:26:32,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:32,197 INFO L225 Difference]: With dead ends: 54 [2021-05-02 20:26:32,198 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:26:32,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:26:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:26:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 20:26:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:26:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 20:26:32,207 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 20:26:32,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:32,208 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 20:26:32,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:26:32,208 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 20:26:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:26:32,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:32,209 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:32,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:32,420 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:32,421 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-02 20:26:32,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:32,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913065566] [2021-05-02 20:26:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:32,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:32,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779892317] [2021-05-02 20:26:32,437 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 [2021-05-02 20:26:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:32,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:26:32,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:32,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 20:26:32,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:32,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913065566] [2021-05-02 20:26:32,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:32,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779892317] [2021-05-02 20:26:32,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779892317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:32,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:32,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:26:32,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789386730] [2021-05-02 20:26:32,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:26:32,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:32,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:26:32,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:26:32,707 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:26:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:32,827 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-02 20:26:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:26:32,827 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 20:26:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:32,829 INFO L225 Difference]: With dead ends: 58 [2021-05-02 20:26:32,829 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:26:32,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:26:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:26:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 20:26:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:26:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 20:26:32,834 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 20:26:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:32,835 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 20:26:32,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:26:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 20:26:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 20:26:32,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:32,836 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:33,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:33,049 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-02 20:26:33,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:33,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186592207] [2021-05-02 20:26:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:33,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:33,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32497983] [2021-05-02 20:26:33,059 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 [2021-05-02 20:26:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:33,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:26:33,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:33,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-02 20:26:33,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:33,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186592207] [2021-05-02 20:26:33,364 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:33,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32497983] [2021-05-02 20:26:33,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32497983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:33,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:33,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:26:33,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708085448] [2021-05-02 20:26:33,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:26:33,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:33,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:26:33,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:26:33,366 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:26:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:37,694 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-02 20:26:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:26:37,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2021-05-02 20:26:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:37,696 INFO L225 Difference]: With dead ends: 62 [2021-05-02 20:26:37,696 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 20:26:37,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:26:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 20:26:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 20:26:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:26:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 20:26:37,711 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 20:26:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:37,712 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 20:26:37,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:26:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 20:26:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 20:26:37,713 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:37,713 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:37,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:26:37,927 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:37,928 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-02 20:26:37,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:37,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260554103] [2021-05-02 20:26:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:37,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:37,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231149081] [2021-05-02 20:26:37,937 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 [2021-05-02 20:26:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:38,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:26:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:38,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 20:26:38,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:38,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260554103] [2021-05-02 20:26:38,154 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:38,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231149081] [2021-05-02 20:26:38,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231149081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:38,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:38,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:26:38,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086593449] [2021-05-02 20:26:38,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:26:38,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:38,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:26:38,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:26:38,156 INFO L87 Difference]: Start difference. First operand 61 states and 74 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, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:26:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:38,320 INFO L93 Difference]: Finished difference Result 89 states and 120 transitions. [2021-05-02 20:26:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:26:38,321 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, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-05-02 20:26:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:38,322 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:26:38,322 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 20:26:38,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:26:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 20:26:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-02 20:26:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:26:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 20:26:38,329 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-02 20:26:38,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:38,330 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 20:26:38,330 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, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:26:38,330 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 20:26:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:26:38,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:38,331 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:38,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:38,549 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:38,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-02 20:26:38,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:38,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215354419] [2021-05-02 20:26:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:38,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:38,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126939131] [2021-05-02 20:26:38,558 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 [2021-05-02 20:26:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:26:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:38,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 20:26:38,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:38,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215354419] [2021-05-02 20:26:38,798 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:38,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126939131] [2021-05-02 20:26:38,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126939131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:38,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:38,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:26:38,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955455339] [2021-05-02 20:26:38,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:26:38,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:38,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:26:38,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:26:38,801 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:26:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:38,952 INFO L93 Difference]: Finished difference Result 116 states and 163 transitions. [2021-05-02 20:26:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:26:38,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:26:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:38,960 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:26:38,960 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:26:38,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:26:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:26:38,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-02 20:26:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 59 states have internal predecessors, (65), 41 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 20:26:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-02 20:26:38,979 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-02 20:26:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:38,979 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-02 20:26:38,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:26:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-02 20:26:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:26:38,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:38,981 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:39,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:39,197 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:39,197 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2021-05-02 20:26:39,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:39,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74193408] [2021-05-02 20:26:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:39,206 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:39,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687762390] [2021-05-02 20:26:39,206 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 [2021-05-02 20:26:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:39,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:26:39,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:39,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-05-02 20:26:39,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:39,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74193408] [2021-05-02 20:26:39,548 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:39,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687762390] [2021-05-02 20:26:39,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687762390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:39,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:39,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:26:39,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241887978] [2021-05-02 20:26:39,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:26:39,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:39,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:26:39,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:26:39,550 INFO L87 Difference]: Start difference. First operand 105 states and 145 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:26:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:39,822 INFO L93 Difference]: Finished difference Result 148 states and 211 transitions. [2021-05-02 20:26:39,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:26:39,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-02 20:26:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:39,824 INFO L225 Difference]: With dead ends: 148 [2021-05-02 20:26:39,824 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 20:26:39,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:26:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 20:26:39,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-02 20:26:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 60 states have call successors, (60), 10 states have call predecessors, (60), 9 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:26:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-02 20:26:39,834 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-02 20:26:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:39,834 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-02 20:26:39,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:26:39,834 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-02 20:26:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:26:39,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:39,835 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:40,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:26:40,049 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2021-05-02 20:26:40,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:40,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250333176] [2021-05-02 20:26:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:40,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:40,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200083886] [2021-05-02 20:26:40,058 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 [2021-05-02 20:26:40,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:26:40,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:40,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 20:26:40,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:40,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-02 20:26:40,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:40,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250333176] [2021-05-02 20:26:40,390 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:40,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200083886] [2021-05-02 20:26:40,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200083886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:40,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:40,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:26:40,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519371220] [2021-05-02 20:26:40,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:26:40,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:40,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:26:40,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:26:40,391 INFO L87 Difference]: Start difference. First operand 144 states and 206 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-05-02 20:26:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:40,614 INFO L93 Difference]: Finished difference Result 150 states and 211 transitions. [2021-05-02 20:26:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:26:40,614 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 80 [2021-05-02 20:26:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:40,616 INFO L225 Difference]: With dead ends: 150 [2021-05-02 20:26:40,616 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 20:26:40,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:26:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 20:26:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-02 20:26:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 84 states have internal predecessors, (92), 60 states have call successors, (60), 11 states have call predecessors, (60), 10 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:26:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-02 20:26:40,625 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-02 20:26:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:40,626 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-02 20:26:40,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-05-02 20:26:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-02 20:26:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:26:40,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:40,627 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:40,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:40,841 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:40,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2021-05-02 20:26:40,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:40,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552776691] [2021-05-02 20:26:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:40,858 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:40,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61772505] [2021-05-02 20:26:40,859 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 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 [2021-05-02 20:26:40,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:26:40,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:40,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:26:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:40,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:40,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-05-02 20:26:41,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:41,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552776691] [2021-05-02 20:26:41,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:41,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61772505] [2021-05-02 20:26:41,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61772505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:41,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:41,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:26:41,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744311897] [2021-05-02 20:26:41,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:26:41,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:41,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:26:41,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:26:41,369 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:26:41,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:41,888 INFO L93 Difference]: Finished difference Result 158 states and 217 transitions. [2021-05-02 20:26:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:26:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 20:26:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:41,896 INFO L225 Difference]: With dead ends: 158 [2021-05-02 20:26:41,896 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 20:26:41,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:26:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 20:26:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2021-05-02 20:26:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 83 states have (on average 1.180722891566265) internal successors, (98), 90 states have internal predecessors, (98), 60 states have call successors, (60), 13 states have call predecessors, (60), 12 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:26:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 215 transitions. [2021-05-02 20:26:41,911 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 215 transitions. Word has length 85 [2021-05-02 20:26:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:41,911 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 215 transitions. [2021-05-02 20:26:41,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:26:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 215 transitions. [2021-05-02 20:26:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:26:41,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:41,914 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:42,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:42,136 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:42,136 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-02 20:26:42,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:42,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288517138] [2021-05-02 20:26:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:42,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:42,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846704551] [2021-05-02 20:26:42,145 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 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 [2021-05-02 20:26:42,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:26:42,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:42,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:26:42,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:42,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-02 20:26:42,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:42,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288517138] [2021-05-02 20:26:42,421 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:42,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846704551] [2021-05-02 20:26:42,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846704551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:42,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:42,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:26:42,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944035723] [2021-05-02 20:26:42,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:26:42,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:42,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:26:42,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:26:42,423 INFO L87 Difference]: Start difference. First operand 156 states and 215 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:26:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:42,724 INFO L93 Difference]: Finished difference Result 217 states and 320 transitions. [2021-05-02 20:26:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:26:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 89 [2021-05-02 20:26:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:42,726 INFO L225 Difference]: With dead ends: 217 [2021-05-02 20:26:42,726 INFO L226 Difference]: Without dead ends: 217 [2021-05-02 20:26:42,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:26:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-02 20:26:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 190. [2021-05-02 20:26:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 103 states have internal predecessors, (116), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-02 20:26:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 273 transitions. [2021-05-02 20:26:42,736 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 273 transitions. Word has length 89 [2021-05-02 20:26:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:42,736 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 273 transitions. [2021-05-02 20:26:42,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:26:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 273 transitions. [2021-05-02 20:26:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 20:26:42,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:42,737 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:42,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:26:42,953 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:42,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:42,953 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-02 20:26:42,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:42,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117110339] [2021-05-02 20:26:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:42,978 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:42,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037838189] [2021-05-02 20:26:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 20:26:43,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:43,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 20:26:43,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:43,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117110339] [2021-05-02 20:26:43,523 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:43,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037838189] [2021-05-02 20:26:43,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037838189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:43,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:43,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:26:43,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766237602] [2021-05-02 20:26:43,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:26:43,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:43,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:26:43,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:26:43,525 INFO L87 Difference]: Start difference. First operand 190 states and 273 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:26:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:44,029 INFO L93 Difference]: Finished difference Result 223 states and 321 transitions. [2021-05-02 20:26:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:26:44,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 91 [2021-05-02 20:26:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:44,031 INFO L225 Difference]: With dead ends: 223 [2021-05-02 20:26:44,031 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 20:26:44,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:26:44,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 20:26:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-05-02 20:26:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 120 states have internal predecessors, (135), 93 states have call successors, (93), 16 states have call predecessors, (93), 15 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 20:26:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 318 transitions. [2021-05-02 20:26:44,042 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 318 transitions. Word has length 91 [2021-05-02 20:26:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:44,042 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 318 transitions. [2021-05-02 20:26:44,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:26:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 318 transitions. [2021-05-02 20:26:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 20:26:44,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:44,043 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:44,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:26:44,265 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:44,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1735983139, now seen corresponding path program 4 times [2021-05-02 20:26:44,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:44,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148704466] [2021-05-02 20:26:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:44,273 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:44,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324334234] [2021-05-02 20:26:44,273 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 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 [2021-05-02 20:26:44,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:26:44,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:44,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:26:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:44,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 20:26:44,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:44,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148704466] [2021-05-02 20:26:44,476 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:44,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324334234] [2021-05-02 20:26:44,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324334234] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:26:44,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:26:44,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:26:44,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428777257] [2021-05-02 20:26:44,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:26:44,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:44,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:26:44,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:26:44,478 INFO L87 Difference]: Start difference. First operand 221 states and 318 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 20:26:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:44,534 INFO L93 Difference]: Finished difference Result 198 states and 274 transitions. [2021-05-02 20:26:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:26:44,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2021-05-02 20:26:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:44,536 INFO L225 Difference]: With dead ends: 198 [2021-05-02 20:26:44,536 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 20:26:44,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:26:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 20:26:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2021-05-02 20:26:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 104 states have internal predecessors, (111), 76 states have call successors, (76), 16 states have call predecessors, (76), 15 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:26:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 260 transitions. [2021-05-02 20:26:44,548 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 260 transitions. Word has length 100 [2021-05-02 20:26:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:44,550 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 260 transitions. [2021-05-02 20:26:44,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 20:26:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 260 transitions. [2021-05-02 20:26:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 20:26:44,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:44,552 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:44,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:26:44,761 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2021-05-02 20:26:44,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:44,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444681781] [2021-05-02 20:26:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:44,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:44,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767489032] [2021-05-02 20:26:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:26:44,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 20:26:44,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:44,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:44,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 68 proven. 41 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-05-02 20:26:45,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444681781] [2021-05-02 20:26:45,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:45,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767489032] [2021-05-02 20:26:45,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767489032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:45,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:45,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:26:45,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363641126] [2021-05-02 20:26:45,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:26:45,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:45,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:26:45,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:26:45,444 INFO L87 Difference]: Start difference. First operand 189 states and 260 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:26:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:52,022 INFO L93 Difference]: Finished difference Result 194 states and 264 transitions. [2021-05-02 20:26:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:26:52,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-02 20:26:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:52,024 INFO L225 Difference]: With dead ends: 194 [2021-05-02 20:26:52,024 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 20:26:52,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:26:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 20:26:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-05-02 20:26:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 100 states have (on average 1.14) internal successors, (114), 107 states have internal predecessors, (114), 76 states have call successors, (76), 17 states have call predecessors, (76), 16 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:26:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 263 transitions. [2021-05-02 20:26:52,031 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 263 transitions. Word has length 107 [2021-05-02 20:26:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:52,031 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 263 transitions. [2021-05-02 20:26:52,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:26:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 263 transitions. [2021-05-02 20:26:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 20:26:52,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:52,033 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:52,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:52,253 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:52,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:52,253 INFO L82 PathProgramCache]: Analyzing trace with hash 82449829, now seen corresponding path program 3 times [2021-05-02 20:26:52,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:52,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139484019] [2021-05-02 20:26:52,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:52,268 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:52,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667363124] [2021-05-02 20:26:52,269 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 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 [2021-05-02 20:26:52,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:26:52,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:52,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:26:52,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:52,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 87 proven. 11 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-05-02 20:26:52,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:52,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139484019] [2021-05-02 20:26:52,541 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:52,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667363124] [2021-05-02 20:26:52,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667363124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:52,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:52,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:26:52,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910936938] [2021-05-02 20:26:52,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:26:52,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:52,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:26:52,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:26:52,542 INFO L87 Difference]: Start difference. First operand 193 states and 263 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 20:26:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:52,617 INFO L93 Difference]: Finished difference Result 197 states and 266 transitions. [2021-05-02 20:26:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:26:52,618 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), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-02 20:26:52,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:52,619 INFO L225 Difference]: With dead ends: 197 [2021-05-02 20:26:52,619 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 20:26:52,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:26:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 20:26:52,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 167. [2021-05-02 20:26:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 91 states have (on average 1.10989010989011) internal successors, (101), 97 states have internal predecessors, (101), 59 states have call successors, (59), 17 states have call predecessors, (59), 16 states have return successors, (56), 52 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 20:26:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 216 transitions. [2021-05-02 20:26:52,626 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 216 transitions. Word has length 111 [2021-05-02 20:26:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:52,626 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 216 transitions. [2021-05-02 20:26:52,626 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), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 20:26:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 216 transitions. [2021-05-02 20:26:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 20:26:52,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:52,627 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:52,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:26:52,841 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-02 20:26:52,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:52,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371749049] [2021-05-02 20:26:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:52,848 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:52,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492635857] [2021-05-02 20:26:52,848 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 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 [2021-05-02 20:26:52,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:26:52,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:52,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 20:26:52,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:52,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:52,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:53,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:54,629 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-02 20:26:54,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:54,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 75 proven. 65 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-05-02 20:26:54,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:54,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371749049] [2021-05-02 20:26:54,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:54,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492635857] [2021-05-02 20:26:54,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492635857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:54,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:54,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:26:54,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019964587] [2021-05-02 20:26:54,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:26:54,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:54,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:26:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:26:54,736 INFO L87 Difference]: Start difference. First operand 167 states and 216 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 20:26:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:55,631 INFO L93 Difference]: Finished difference Result 200 states and 263 transitions. [2021-05-02 20:26:55,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:26:55,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2021-05-02 20:26:55,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:55,633 INFO L225 Difference]: With dead ends: 200 [2021-05-02 20:26:55,633 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 20:26:55,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1865.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:26:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 20:26:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2021-05-02 20:26:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 114 states have internal predecessors, (119), 72 states have call successors, (72), 19 states have call predecessors, (72), 18 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 20:26:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2021-05-02 20:26:55,640 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 113 [2021-05-02 20:26:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:55,640 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2021-05-02 20:26:55,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 20:26:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2021-05-02 20:26:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 20:26:55,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:55,643 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:55,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:26:55,865 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:55,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1855467922, now seen corresponding path program 3 times [2021-05-02 20:26:55,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:55,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432702296] [2021-05-02 20:26:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:55,877 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:55,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748950391] [2021-05-02 20:26:55,877 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 [2021-05-02 20:26:55,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:26:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:26:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:56,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 20:26:56,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432702296] [2021-05-02 20:26:56,125 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748950391] [2021-05-02 20:26:56,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748950391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:56,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:56,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:26:56,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306143245] [2021-05-02 20:26:56,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:26:56,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:56,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:26:56,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:26:56,127 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 20:26:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:56,329 INFO L93 Difference]: Finished difference Result 240 states and 336 transitions. [2021-05-02 20:26:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:26:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-02 20:26:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:56,331 INFO L225 Difference]: With dead ends: 240 [2021-05-02 20:26:56,331 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 20:26:56,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:26:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 20:26:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 221. [2021-05-02 20:26:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 117 states have internal predecessors, (132), 87 states have call successors, (87), 19 states have call predecessors, (87), 18 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2021-05-02 20:26:56,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 303 transitions. [2021-05-02 20:26:56,339 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 303 transitions. Word has length 116 [2021-05-02 20:26:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:56,340 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 303 transitions. [2021-05-02 20:26:56,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 20:26:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 303 transitions. [2021-05-02 20:26:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 20:26:56,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:56,341 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:56,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:26:56,563 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:56,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1380247977, now seen corresponding path program 2 times [2021-05-02 20:26:56,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:56,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152841213] [2021-05-02 20:26:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:56,570 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:56,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87353795] [2021-05-02 20:26:56,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:56,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:26:56,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:26:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:56,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:56,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 49 proven. 62 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-05-02 20:26:57,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:57,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152841213] [2021-05-02 20:26:57,213 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:57,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87353795] [2021-05-02 20:26:57,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87353795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:57,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:57,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:26:57,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057346480] [2021-05-02 20:26:57,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:26:57,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:57,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:26:57,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:26:57,216 INFO L87 Difference]: Start difference. First operand 221 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:26:58,870 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-05-02 20:26:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:26:59,483 INFO L93 Difference]: Finished difference Result 277 states and 387 transitions. [2021-05-02 20:26:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 20:26:59,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2021-05-02 20:26:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:26:59,485 INFO L225 Difference]: With dead ends: 277 [2021-05-02 20:26:59,485 INFO L226 Difference]: Without dead ends: 277 [2021-05-02 20:26:59,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1283.3ms TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 20:26:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-02 20:26:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 271. [2021-05-02 20:26:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 139 states have (on average 1.158273381294964) internal successors, (161), 141 states have internal predecessors, (161), 111 states have call successors, (111), 21 states have call predecessors, (111), 20 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 20:26:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 380 transitions. [2021-05-02 20:26:59,494 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 380 transitions. Word has length 122 [2021-05-02 20:26:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:26:59,494 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 380 transitions. [2021-05-02 20:26:59,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:26:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 380 transitions. [2021-05-02 20:26:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 20:26:59,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:26:59,496 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:26:59,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:59,709 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:26:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:26:59,709 INFO L82 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 3 times [2021-05-02 20:26:59,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:26:59,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964359231] [2021-05-02 20:26:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:26:59,724 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:26:59,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773993494] [2021-05-02 20:26:59,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:26:59,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:26:59,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:26:59,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 20:26:59,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:26:59,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:59,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:59,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:00,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:00,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 78 proven. 41 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-02 20:27:00,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:27:00,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964359231] [2021-05-02 20:27:00,149 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:27:00,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773993494] [2021-05-02 20:27:00,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773993494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:27:00,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:27:00,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:27:00,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618775694] [2021-05-02 20:27:00,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:27:00,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:27:00,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:27:00,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:27:00,150 INFO L87 Difference]: Start difference. First operand 271 states and 380 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 20:27:00,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:27:00,724 INFO L93 Difference]: Finished difference Result 311 states and 430 transitions. [2021-05-02 20:27:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:27:00,725 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-02 20:27:00,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:27:00,727 INFO L225 Difference]: With dead ends: 311 [2021-05-02 20:27:00,727 INFO L226 Difference]: Without dead ends: 311 [2021-05-02 20:27:00,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:27:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-02 20:27:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2021-05-02 20:27:00,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 160 states have (on average 1.15) internal successors, (184), 162 states have internal predecessors, (184), 123 states have call successors, (123), 25 states have call predecessors, (123), 24 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:27:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 427 transitions. [2021-05-02 20:27:00,737 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 427 transitions. Word has length 127 [2021-05-02 20:27:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:27:00,737 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 427 transitions. [2021-05-02 20:27:00,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 20:27:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 427 transitions. [2021-05-02 20:27:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 20:27:00,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:27:00,739 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:27:00,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:27:00,953 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:27:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:27:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 4 times [2021-05-02 20:27:00,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:27:00,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584176011] [2021-05-02 20:27:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:27:00,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:27:00,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398004557] [2021-05-02 20:27:00,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:27:01,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:27:01,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:27:01,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 20:27:01,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:27:01,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 119 proven. 93 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-05-02 20:27:01,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:27:01,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584176011] [2021-05-02 20:27:01,786 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:27:01,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398004557] [2021-05-02 20:27:01,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398004557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:27:01,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:27:01,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:27:01,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729346253] [2021-05-02 20:27:01,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:27:01,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:27:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:27:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:27:01,787 INFO L87 Difference]: Start difference. First operand 308 states and 427 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 20:27:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:27:05,785 INFO L93 Difference]: Finished difference Result 326 states and 441 transitions. [2021-05-02 20:27:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:27:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2021-05-02 20:27:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:27:05,788 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:27:05,788 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 20:27:05,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 487.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:27:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 20:27:05,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2021-05-02 20:27:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 172 states have (on average 1.1395348837209303) internal successors, (196), 174 states have internal predecessors, (196), 123 states have call successors, (123), 29 states have call predecessors, (123), 28 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:27:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 439 transitions. [2021-05-02 20:27:05,798 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 439 transitions. Word has length 129 [2021-05-02 20:27:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:27:05,798 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 439 transitions. [2021-05-02 20:27:05,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 20:27:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 439 transitions. [2021-05-02 20:27:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 20:27:05,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:27:05,800 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:27:06,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:27:06,022 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:27:06,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:27:06,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 5 times [2021-05-02 20:27:06,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:27:06,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313022462] [2021-05-02 20:27:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:27:06,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:27:06,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430941269] [2021-05-02 20:27:06,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:27:06,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 20:27:06,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:27:06,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 20:27:06,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:27:06,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:06,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 91 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 20:27:07,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:27:07,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313022462] [2021-05-02 20:27:07,527 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:27:07,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430941269] [2021-05-02 20:27:07,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430941269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:27:07,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:27:07,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 20:27:07,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011662713] [2021-05-02 20:27:07,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 20:27:07,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:27:07,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 20:27:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:27:07,528 INFO L87 Difference]: Start difference. First operand 324 states and 439 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 20:27:08,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:27:08,840 INFO L93 Difference]: Finished difference Result 345 states and 456 transitions. [2021-05-02 20:27:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:27:08,841 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) Word has length 132 [2021-05-02 20:27:08,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:27:08,843 INFO L225 Difference]: With dead ends: 345 [2021-05-02 20:27:08,843 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 20:27:08,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1051.1ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:27:08,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 20:27:08,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 340. [2021-05-02 20:27:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 184 states have (on average 1.1304347826086956) internal successors, (208), 186 states have internal predecessors, (208), 123 states have call successors, (123), 33 states have call predecessors, (123), 32 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:27:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 451 transitions. [2021-05-02 20:27:08,852 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 451 transitions. Word has length 132 [2021-05-02 20:27:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:27:08,853 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 451 transitions. [2021-05-02 20:27:08,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 20:27:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 451 transitions. [2021-05-02 20:27:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 20:27:08,854 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:27:08,854 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:27:09,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:27:09,059 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:27:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:27:09,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1694952883, now seen corresponding path program 4 times [2021-05-02 20:27:09,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:27:09,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819479323] [2021-05-02 20:27:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:27:09,079 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:27:09,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798334043] [2021-05-02 20:27:09,079 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 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 [2021-05-02 20:27:09,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:27:09,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:27:09,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 20:27:09,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:27:09,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 84 proven. 85 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 20:27:09,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:27:09,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819479323] [2021-05-02 20:27:09,803 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:27:09,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798334043] [2021-05-02 20:27:09,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798334043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:27:09,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:27:09,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:27:09,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999222778] [2021-05-02 20:27:09,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:27:09,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:27:09,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:27:09,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:27:09,806 INFO L87 Difference]: Start difference. First operand 340 states and 451 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:27:10,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:27:10,627 INFO L93 Difference]: Finished difference Result 374 states and 504 transitions. [2021-05-02 20:27:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:27:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 135 [2021-05-02 20:27:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:27:10,629 INFO L225 Difference]: With dead ends: 374 [2021-05-02 20:27:10,629 INFO L226 Difference]: Without dead ends: 373 [2021-05-02 20:27:10,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 517.6ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:27:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-02 20:27:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 371. [2021-05-02 20:27:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 198 states have (on average 1.1363636363636365) internal successors, (225), 200 states have internal predecessors, (225), 139 states have call successors, (139), 34 states have call predecessors, (139), 33 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-02 20:27:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 500 transitions. [2021-05-02 20:27:10,640 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 500 transitions. Word has length 135 [2021-05-02 20:27:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:27:10,641 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 500 transitions. [2021-05-02 20:27:10,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:27:10,641 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 500 transitions. [2021-05-02 20:27:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 20:27:10,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:27:10,642 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:27:10,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:27:10,843 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:27:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:27:10,843 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 5 times [2021-05-02 20:27:10,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:27:10,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404009145] [2021-05-02 20:27:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:27:10,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:27:10,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681827091] [2021-05-02 20:27:10,849 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 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 [2021-05-02 20:27:10,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 20:27:10,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:27:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 20:27:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:27:11,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:11,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:13,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 102 proven. 153 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-05-02 20:27:14,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:27:14,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404009145] [2021-05-02 20:27:14,083 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:27:14,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681827091] [2021-05-02 20:27:14,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681827091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:27:14,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:27:14,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 20:27:14,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201278174] [2021-05-02 20:27:14,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 20:27:14,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:27:14,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 20:27:14,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:27:14,085 INFO L87 Difference]: Start difference. First operand 371 states and 500 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:27:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:27:17,278 INFO L93 Difference]: Finished difference Result 423 states and 568 transitions. [2021-05-02 20:27:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:27:17,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-02 20:27:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:27:17,281 INFO L225 Difference]: With dead ends: 423 [2021-05-02 20:27:17,281 INFO L226 Difference]: Without dead ends: 423 [2021-05-02 20:27:17,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2911.4ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:27:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-02 20:27:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 419. [2021-05-02 20:27:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 224 states have (on average 1.1383928571428572) internal successors, (255), 227 states have internal predecessors, (255), 156 states have call successors, (156), 39 states have call predecessors, (156), 38 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2021-05-02 20:27:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 564 transitions. [2021-05-02 20:27:17,293 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 564 transitions. Word has length 138 [2021-05-02 20:27:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:27:17,293 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 564 transitions. [2021-05-02 20:27:17,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:27:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 564 transitions. [2021-05-02 20:27:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 20:27:17,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:27:17,295 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:27:17,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 20:27:17,517 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:27:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:27:17,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1199073726, now seen corresponding path program 1 times [2021-05-02 20:27:17,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:27:17,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782363754] [2021-05-02 20:27:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:27:17,525 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:27:17,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122991679] [2021-05-02 20:27:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 20:27:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:27:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 20:27:17,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:27:17,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:17,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:27:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 59 proven. 123 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-05-02 20:27:18,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:27:18,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782363754] [2021-05-02 20:27:18,276 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:27:18,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122991679] [2021-05-02 20:27:18,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122991679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:27:18,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:27:18,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:27:18,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919154992] [2021-05-02 20:27:18,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:27:18,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:27:18,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:27:18,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:27:18,277 INFO L87 Difference]: Start difference. First operand 419 states and 564 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 20:27:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:27:19,271 INFO L93 Difference]: Finished difference Result 427 states and 571 transitions. [2021-05-02 20:27:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:27:19,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 143 [2021-05-02 20:27:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:27:19,274 INFO L225 Difference]: With dead ends: 427 [2021-05-02 20:27:19,274 INFO L226 Difference]: Without dead ends: 425 [2021-05-02 20:27:19,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 617.4ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:27:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-05-02 20:27:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 422. [2021-05-02 20:27:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 227 states have (on average 1.13215859030837) internal successors, (257), 229 states have internal predecessors, (257), 155 states have call successors, (155), 40 states have call predecessors, (155), 39 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2021-05-02 20:27:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 564 transitions. [2021-05-02 20:27:19,287 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 564 transitions. Word has length 143 [2021-05-02 20:27:19,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:27:19,287 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 564 transitions. [2021-05-02 20:27:19,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 20:27:19,287 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 564 transitions. [2021-05-02 20:27:19,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 20:27:19,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:27:19,289 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:27:19,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:27:19,503 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:27:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:27:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1825079459, now seen corresponding path program 6 times [2021-05-02 20:27:19,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:27:19,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118691889] [2021-05-02 20:27:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:27:19,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:27:19,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840929621] [2021-05-02 20:27:19,514 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 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