/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/ps6-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:46:53,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:46:53,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:46:53,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:46:53,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:46:53,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:46:53,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:46:53,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:46:53,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:46:53,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:46:53,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:46:53,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:46:53,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:46:53,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:46:53,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:46:53,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:46:53,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:46:53,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:46:53,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:46:53,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:46:53,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:46:53,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:46:53,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:46:53,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:46:53,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 10:46:53,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 10:46:53,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 10:46:53,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 10:46:53,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 10:46:53,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 10:46:53,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 10:46:53,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 10:46:53,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 10:46:53,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 10:46:53,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 10:46:53,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 10:46:53,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 10:46:53,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 10:46:53,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:46:53,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:46:53,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:46:53,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:46:53,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:46:53,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:46:53,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:46:53,834 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:46:53,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:46:53,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:46:53,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:46:53,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:46:53,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:46:53,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:46:53,835 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:46:53,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:46:53,836 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:46:53,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:46:53,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:46:53,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:46:53,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:46:53,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:46:53,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:46:53,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:46:53,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:46:53,838 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:46:53,838 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:46:54,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:46:54,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:46:54,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:46:54,110 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:46:54,111 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:46:54,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound20.c [2021-05-06 10:46:54,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a0a3c44/e34172b2420a418facab873935cd01f3/FLAGf7a6e6fe6 [2021-05-06 10:46:54,504 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:46:54,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound20.c [2021-05-06 10:46:54,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a0a3c44/e34172b2420a418facab873935cd01f3/FLAGf7a6e6fe6 [2021-05-06 10:46:54,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a0a3c44/e34172b2420a418facab873935cd01f3 [2021-05-06 10:46:54,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:46:54,526 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:46:54,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:46:54,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:46:54,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:46:54,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:46:54" (1/1) ... [2021-05-06 10:46:54,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a9f4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54, skipping insertion in model container [2021-05-06 10:46:54,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:46:54" (1/1) ... [2021-05-06 10:46:54,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:46:54,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:46:54,659 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/ps6-ll_valuebound20.c[458,471] [2021-05-06 10:46:54,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:46:54,689 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:46:54,700 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/ps6-ll_valuebound20.c[458,471] [2021-05-06 10:46:54,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:46:54,752 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:46:54,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54 WrapperNode [2021-05-06 10:46:54,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:46:54,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:46:54,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:46:54,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:46:54,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54" (1/1) ... [2021-05-06 10:46:54,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54" (1/1) ... [2021-05-06 10:46:54,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54" (1/1) ... [2021-05-06 10:46:54,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54" (1/1) ... [2021-05-06 10:46:54,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54" (1/1) ... [2021-05-06 10:46:54,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54" (1/1) ... [2021-05-06 10:46:54,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54" (1/1) ... [2021-05-06 10:46:54,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:46:54,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:46:54,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:46:54,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:46:54,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:46:54,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:46:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:46:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:46:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:46:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:46:54,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:46:54,855 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:46:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:46:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:46:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:46:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:46:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:46:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:46:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:46:54,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:46:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:46:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:46:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:46:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:46:54,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:46:55,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:46:55,044 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:46:55,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:46:55 BoogieIcfgContainer [2021-05-06 10:46:55,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:46:55,045 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:46:55,045 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:46:55,046 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:46:55,048 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:46:55" (1/1) ... [2021-05-06 10:46:55,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:46:55 BasicIcfg [2021-05-06 10:46:55,083 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:46:55,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:46:55,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:46:55,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:46:55,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:46:54" (1/4) ... [2021-05-06 10:46:55,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670d974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:46:55, skipping insertion in model container [2021-05-06 10:46:55,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:46:54" (2/4) ... [2021-05-06 10:46:55,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670d974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:46:55, skipping insertion in model container [2021-05-06 10:46:55,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:46:55" (3/4) ... [2021-05-06 10:46:55,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670d974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:46:55, skipping insertion in model container [2021-05-06 10:46:55,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:46:55" (4/4) ... [2021-05-06 10:46:55,087 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound20.cJordan [2021-05-06 10:46:55,091 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:46:55,110 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:46:55,127 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:46:55,139 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:46:55,140 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:46:55,140 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:46:55,140 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:46:55,140 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:46:55,140 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:46:55,140 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:46:55,140 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:46:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:46:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:46:55,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:46:55,153 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:46:55,154 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:46:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:46:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-06 10:46:55,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:46:55,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242293319] [2021-05-06 10:46:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:46:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:46:55,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:46:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:46:55,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:46:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:46:55,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 10:46:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:46:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:46:55,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:46:55,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242293319] [2021-05-06 10:46:55,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242293319] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:46:55,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:46:55,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:46:55,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499907418] [2021-05-06 10:46:55,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:46:55,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:46:55,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:46:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:46:55,373 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:46:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:46:55,442 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-06 10:46:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:46:55,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 10:46:55,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:46:55,449 INFO L225 Difference]: With dead ends: 29 [2021-05-06 10:46:55,449 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 10:46:55,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:46:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 10:46:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 10:46:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:46:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:46:55,476 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 10:46:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:46:55,476 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:46:55,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:46:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:46:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:46:55,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:46:55,478 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:46:55,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:46:55,479 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:46:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:46:55,480 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-06 10:46:55,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:46:55,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286333947] [2021-05-06 10:46:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:46:55,509 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:46:55,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114187291] [2021-05-06 10:46:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:46:55,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:46:55,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:46:55,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:46:55,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:46:55,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286333947] [2021-05-06 10:46:55,697 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:46:55,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114187291] [2021-05-06 10:46:55,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114187291] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:46:55,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:46:55,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:46:55,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416770732] [2021-05-06 10:46:55,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:46:55,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:46:55,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:46:55,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:46:55,699 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:46:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:46:55,745 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-06 10:46:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:46:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 10:46:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:46:55,746 INFO L225 Difference]: With dead ends: 33 [2021-05-06 10:46:55,746 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 10:46:55,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:46:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 10:46:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 10:46:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:46:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 10:46:55,751 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 10:46:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:46:55,751 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 10:46:55,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:46:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 10:46:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 10:46:55,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:46:55,752 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:46:55,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:46:55,969 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:46:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:46:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-06 10:46:55,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:46:55,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846331323] [2021-05-06 10:46:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:46:55,978 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:46:55,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636867413] [2021-05-06 10:46:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:46:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:46:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:46:56,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:46:56,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:46:56,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846331323] [2021-05-06 10:46:56,127 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:46:56,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636867413] [2021-05-06 10:46:56,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636867413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:46:56,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:46:56,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:46:56,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918437745] [2021-05-06 10:46:56,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:46:56,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:46:56,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:46:56,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:46:56,128 INFO L87 Difference]: Start difference. First operand 31 states and 34 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:46:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:46:56,238 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-06 10:46:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:46:56,238 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 10:46:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:46:56,239 INFO L225 Difference]: With dead ends: 40 [2021-05-06 10:46:56,239 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 10:46:56,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:46:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 10:46:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 10:46:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:46:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 10:46:56,244 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 10:46:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:46:56,244 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 10:46:56,244 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:46:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 10:46:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:46:56,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:46:56,245 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:46:56,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:56,450 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:46:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:46:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-06 10:46:56,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:46:56,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033602679] [2021-05-06 10:46:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:46:56,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:46:56,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938075605] [2021-05-06 10:46:56,471 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:56,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:46:56,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:46:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:46:56,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:46:56,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 10:46:56,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:46:56,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033602679] [2021-05-06 10:46:56,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:46:56,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938075605] [2021-05-06 10:46:56,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938075605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:46:56,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:46:56,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:46:56,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52524010] [2021-05-06 10:46:56,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:46:56,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:46:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:46:56,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:46:56,850 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:46:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:46:56,920 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-06 10:46:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:46:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 10:46:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:46:56,924 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:46:56,924 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:46:56,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:46:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:46:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 10:46:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:46:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 10:46:56,940 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 10:46:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:46:56,940 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 10:46:56,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:46:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 10:46:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:46:56,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:46:56,943 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:46:57,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:57,148 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:46:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:46:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-06 10:46:57,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:46:57,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025914813] [2021-05-06 10:46:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:46:57,156 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:46:57,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358371178] [2021-05-06 10:46:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:46:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:46:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:46:57,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 10:46:57,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:46:57,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025914813] [2021-05-06 10:46:57,476 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:46:57,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358371178] [2021-05-06 10:46:57,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358371178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:46:57,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:46:57,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:46:57,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866627179] [2021-05-06 10:46:57,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:46:57,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:46:57,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:46:57,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:46:57,477 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:46:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:46:57,640 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:46:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:46:57,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 10:46:57,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:46:57,642 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:46:57,642 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:46:57,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:46:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:46:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:46:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:46:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:46:57,646 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 10:46:57,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:46:57,646 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:46:57,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:46:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:46:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:46:57,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:46:57,647 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:46:57,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:57,853 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:46:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:46:57,853 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-06 10:46:57,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:46:57,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940910742] [2021-05-06 10:46:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:46:57,862 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:46:57,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300583444] [2021-05-06 10:46:57,862 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:58,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:46:58,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:46:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:46:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:46:58,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:58,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:58,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 10:46:58,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:46:58,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940910742] [2021-05-06 10:46:58,657 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:46:58,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300583444] [2021-05-06 10:46:58,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300583444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:46:58,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:46:58,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:46:58,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165202236] [2021-05-06 10:46:58,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:46:58,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:46:58,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:46:58,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:46:58,658 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 10:46:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:46:58,703 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:46:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:46:58,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-06 10:46:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:46:58,704 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:46:58,704 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:46:58,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:46:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:46:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-06 10:46:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:46:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 10:46:58,707 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-06 10:46:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:46:58,707 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 10:46:58,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 10:46:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 10:46:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 10:46:58,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:46:58,708 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:46:58,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:46:58,916 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:46:58,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:46:58,917 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-06 10:46:58,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:46:58,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270749894] [2021-05-06 10:46:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:46:58,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:46:58,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174994230] [2021-05-06 10:46:58,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:59,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:46:59,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:46:59,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 10:46:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:46:59,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 10:46:59,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:46:59,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270749894] [2021-05-06 10:46:59,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:46:59,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174994230] [2021-05-06 10:46:59,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174994230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:46:59,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:46:59,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:46:59,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071415009] [2021-05-06 10:46:59,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:46:59,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:46:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:46:59,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:46:59,173 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:46:59,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:46:59,250 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 10:46:59,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:46:59,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-06 10:46:59,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:46:59,251 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:46:59,251 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:46:59,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:46:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:46:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:46:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:46:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 10:46:59,254 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-06 10:46:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:46:59,254 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 10:46:59,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:46:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 10:46:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 10:46:59,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:46:59,255 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:46:59,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:59,456 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:46:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:46:59,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-06 10:46:59,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:46:59,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985811415] [2021-05-06 10:46:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:46:59,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:46:59,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517790467] [2021-05-06 10:46:59,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:46:59,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:46:59,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:46:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:46:59,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:46:59,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:46:59,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 10:47:00,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:47:00,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985811415] [2021-05-06 10:47:00,017 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:47:00,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517790467] [2021-05-06 10:47:00,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517790467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:47:00,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:47:00,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:47:00,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146875826] [2021-05-06 10:47:00,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:47:00,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:47:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:47:00,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:47:00,020 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:47:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:47:00,118 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-06 10:47:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:47:00,118 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-06 10:47:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:47:00,119 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:47:00,119 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:47:00,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:47:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:47:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:47:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:47:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 10:47:00,122 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-06 10:47:00,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:47:00,122 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 10:47:00,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:47:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 10:47:00,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:47:00,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:47:00,123 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:47:00,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:47:00,330 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:47:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:47:00,330 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-06 10:47:00,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:47:00,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392548889] [2021-05-06 10:47:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:47:00,336 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:47:00,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516233151] [2021-05-06 10:47:00,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:00,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:47:00,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:47:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:47:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:47:00,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 10:47:00,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:47:00,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392548889] [2021-05-06 10:47:00,540 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:47:00,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516233151] [2021-05-06 10:47:00,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516233151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:47:00,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:47:00,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:47:00,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361669073] [2021-05-06 10:47:00,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:47:00,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:47:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:47:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:47:00,541 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:47:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:47:00,640 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:47:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:47:00,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-06 10:47:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:47:00,641 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:47:00,641 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:47:00,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:47:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:47:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:47:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:47:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:47:00,645 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-06 10:47:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:47:00,645 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:47:00,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:47:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:47:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:47:00,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:47:00,646 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:47:00,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 10:47:00,865 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:47:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:47:00,865 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-06 10:47:00,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:47:00,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005171582] [2021-05-06 10:47:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:47:00,871 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:47:00,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914158112] [2021-05-06 10:47:00,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:01,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:47:01,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:47:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:47:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:47:01,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 10:47:01,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:47:01,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005171582] [2021-05-06 10:47:01,670 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:47:01,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914158112] [2021-05-06 10:47:01,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914158112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:47:01,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:47:01,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:47:01,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895451090] [2021-05-06 10:47:01,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:47:01,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:47:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:47:01,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:47:01,672 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 10:47:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:47:01,785 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-06 10:47:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:47:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-06 10:47:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:47:01,786 INFO L225 Difference]: With dead ends: 56 [2021-05-06 10:47:01,786 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:47:01,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:47:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:47:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 10:47:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:47:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-06 10:47:01,789 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-06 10:47:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:47:01,789 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-06 10:47:01,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 10:47:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-06 10:47:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 10:47:01,790 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:47:01,790 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:47:01,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:01,997 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:47:01,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:47:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2021-05-06 10:47:01,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:47:01,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238569556] [2021-05-06 10:47:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:47:02,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:47:02,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709294367] [2021-05-06 10:47:02,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:07,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 10:47:07,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:47:07,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 10:47:07,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:47:07,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:07,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-05-06 10:47:08,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:47:08,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238569556] [2021-05-06 10:47:08,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:47:08,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709294367] [2021-05-06 10:47:08,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709294367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:47:08,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:47:08,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 10:47:08,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359591732] [2021-05-06 10:47:08,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 10:47:08,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:47:08,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 10:47:08,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:47:08,010 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-06 10:47:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:47:08,143 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-05-06 10:47:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:47:08,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2021-05-06 10:47:08,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:47:08,144 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:47:08,145 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 10:47:08,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:47:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 10:47:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 10:47:08,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:47:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-05-06 10:47:08,149 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 75 [2021-05-06 10:47:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:47:08,150 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-05-06 10:47:08,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-06 10:47:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-05-06 10:47:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 10:47:08,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:47:08,151 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:47:08,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:47:08,364 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:47:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:47:08,364 INFO L82 PathProgramCache]: Analyzing trace with hash 252865655, now seen corresponding path program 7 times [2021-05-06 10:47:08,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:47:08,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060755225] [2021-05-06 10:47:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:47:08,370 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:47:08,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693618931] [2021-05-06 10:47:08,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:47:08,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 10:47:08,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:47:09,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-05-06 10:47:09,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:47:09,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060755225] [2021-05-06 10:47:09,201 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:47:09,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693618931] [2021-05-06 10:47:09,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693618931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:47:09,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:47:09,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 10:47:09,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109650205] [2021-05-06 10:47:09,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 10:47:09,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:47:09,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 10:47:09,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:47:09,202 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-05-06 10:47:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:47:09,351 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-05-06 10:47:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 10:47:09,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2021-05-06 10:47:09,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:47:09,352 INFO L225 Difference]: With dead ends: 62 [2021-05-06 10:47:09,352 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 10:47:09,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 10:47:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 10:47:09,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 10:47:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 15 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:47:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 10:47:09,355 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 82 [2021-05-06 10:47:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:47:09,355 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 10:47:09,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-05-06 10:47:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 10:47:09,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 10:47:09,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:47:09,356 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:47:09,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 10:47:09,561 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:47:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:47:09,561 INFO L82 PathProgramCache]: Analyzing trace with hash 288751971, now seen corresponding path program 8 times [2021-05-06 10:47:09,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:47:09,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615315431] [2021-05-06 10:47:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:47:09,569 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:47:09,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347260520] [2021-05-06 10:47:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:15,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:47:15,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:47:15,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 10:47:15,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:47:15,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-05-06 10:47:15,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:47:15,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615315431] [2021-05-06 10:47:15,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:47:15,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347260520] [2021-05-06 10:47:15,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347260520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:47:15,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:47:15,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 10:47:15,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461225259] [2021-05-06 10:47:15,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 10:47:15,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:47:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 10:47:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:47:15,926 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-05-06 10:47:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:47:16,099 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-05-06 10:47:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 10:47:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2021-05-06 10:47:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:47:16,100 INFO L225 Difference]: With dead ends: 65 [2021-05-06 10:47:16,100 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 10:47:16,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:47:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 10:47:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 10:47:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 16 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:47:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-05-06 10:47:16,103 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 89 [2021-05-06 10:47:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:47:16,103 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-05-06 10:47:16,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-05-06 10:47:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-05-06 10:47:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 10:47:16,104 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:47:16,104 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:47:16,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:16,315 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:47:16,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:47:16,315 INFO L82 PathProgramCache]: Analyzing trace with hash -482784521, now seen corresponding path program 9 times [2021-05-06 10:47:16,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:47:16,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447486274] [2021-05-06 10:47:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:47:16,323 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:47:16,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746453808] [2021-05-06 10:47:16,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:18,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 10:47:18,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:47:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 10:47:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:47:18,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 22 proven. 135 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 10:47:18,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:47:18,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447486274] [2021-05-06 10:47:18,526 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:47:18,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746453808] [2021-05-06 10:47:18,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746453808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:47:18,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:47:18,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 10:47:18,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320094662] [2021-05-06 10:47:18,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 10:47:18,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:47:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 10:47:18,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 10:47:18,529 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-05-06 10:47:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:47:18,722 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-05-06 10:47:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 10:47:18,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 96 [2021-05-06 10:47:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:47:18,723 INFO L225 Difference]: With dead ends: 68 [2021-05-06 10:47:18,723 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 10:47:18,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 10:47:18,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 10:47:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 10:47:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:47:18,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-05-06 10:47:18,726 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 96 [2021-05-06 10:47:18,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:47:18,726 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-05-06 10:47:18,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-05-06 10:47:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-05-06 10:47:18,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 10:47:18,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:47:18,727 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:47:18,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 10:47:18,933 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:47:18,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:47:18,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1680878877, now seen corresponding path program 10 times [2021-05-06 10:47:18,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:47:18,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545794763] [2021-05-06 10:47:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:47:18,939 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:47:18,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238599644] [2021-05-06 10:47:18,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:18,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:47:18,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:47:18,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 10:47:18,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:47:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-06 10:47:19,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:47:19,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545794763] [2021-05-06 10:47:19,226 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:47:19,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238599644] [2021-05-06 10:47:19,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238599644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:47:19,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:47:19,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 10:47:19,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432892237] [2021-05-06 10:47:19,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 10:47:19,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:47:19,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 10:47:19,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:47:19,228 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-05-06 10:47:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:47:19,469 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-05-06 10:47:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 10:47:19,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 103 [2021-05-06 10:47:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:47:19,470 INFO L225 Difference]: With dead ends: 71 [2021-05-06 10:47:19,470 INFO L226 Difference]: Without dead ends: 67 [2021-05-06 10:47:19,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 10:47:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-06 10:47:19,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-06 10:47:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 18 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:47:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-05-06 10:47:19,473 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 103 [2021-05-06 10:47:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:47:19,473 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-05-06 10:47:19,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-05-06 10:47:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-05-06 10:47:19,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 10:47:19,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:47:19,474 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:47:19,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:19,689 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:47:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:47:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1330067081, now seen corresponding path program 11 times [2021-05-06 10:47:19,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:47:19,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236753076] [2021-05-06 10:47:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:47:19,694 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:47:19,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796790439] [2021-05-06 10:47:19,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:47:22,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 10:47:22,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:47:22,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 10:47:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:47:22,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:47:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 26 proven. 198 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-05-06 10:47:22,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:47:22,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236753076] [2021-05-06 10:47:22,385 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:47:22,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796790439] [2021-05-06 10:47:22,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796790439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:47:22,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:47:22,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 10:47:22,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666266632] [2021-05-06 10:47:22,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 10:47:22,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:47:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 10:47:22,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-06 10:47:22,387 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2021-05-06 10:47:22,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:47:22,648 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2021-05-06 10:47:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 10:47:22,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 110 [2021-05-06 10:47:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:47:22,649 INFO L225 Difference]: With dead ends: 74 [2021-05-06 10:47:22,649 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 10:47:22,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-06 10:47:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 10:47:22,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-06 10:47:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 19 states have call successors, (19), 7 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:47:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-05-06 10:47:22,651 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 110 [2021-05-06 10:47:22,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:47:22,652 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-05-06 10:47:22,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2021-05-06 10:47:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-05-06 10:47:22,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-06 10:47:22,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:47:22,652 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:47:22,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 10:47:22,860 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:47:22,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:47:22,861 INFO L82 PathProgramCache]: Analyzing trace with hash 907871331, now seen corresponding path program 12 times [2021-05-06 10:47:22,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:47:22,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062273004] [2021-05-06 10:47:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:47:22,869 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:47:22,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512787931] [2021-05-06 10:47:22,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:48:05,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 10:48:05,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:48:05,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 10:48:05,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:48:05,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:48:05,648 WARN L159 QuantifierPusher]: Ignoring assumption.