/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 00:16:40,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 00:16:40,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 00:16:40,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 00:16:40,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 00:16:40,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 00:16:40,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 00:16:40,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 00:16:40,734 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 00:16:40,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 00:16:40,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 00:16:40,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 00:16:40,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 00:16:40,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 00:16:40,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 00:16:40,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 00:16:40,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 00:16:40,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 00:16:40,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 00:16:40,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 00:16:40,756 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 00:16:40,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 00:16:40,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 00:16:40,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 00:16:40,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 00:16:40,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 00:16:40,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 00:16:40,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 00:16:40,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 00:16:40,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 00:16:40,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 00:16:40,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 00:16:40,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 00:16:40,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 00:16:40,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 00:16:40,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 00:16:40,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 00:16:40,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 00:16:40,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 00:16:40,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 00:16:40,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 00:16:40,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 00:16:40,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-19 00:16:40,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 00:16:40,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 00:16:40,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 00:16:40,799 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 00:16:40,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 00:16:40,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 00:16:40,800 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 00:16:40,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 00:16:40,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 00:16:40,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 00:16:40,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 00:16:40,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 00:16:40,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 00:16:40,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 00:16:40,802 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 00:16:40,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 00:16:40,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 00:16:40,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 00:16:40,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 00:16:40,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 00:16:40,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 00:16:40,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 00:16:40,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 00:16:40,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 00:16:40,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 00:16:40,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 00:16:40,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-19 00:16:40,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-19 00:16:40,804 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-19 00:16:40,804 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 00:16:41,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 00:16:41,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 00:16:41,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 00:16:41,053 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 00:16:41,053 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 00:16:41,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c [2022-03-19 00:16:41,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa5becd9/6276a937080c4bcf9162de888c0cfecc/FLAG25670fa9b [2022-03-19 00:16:41,486 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 00:16:41,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c [2022-03-19 00:16:41,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa5becd9/6276a937080c4bcf9162de888c0cfecc/FLAG25670fa9b [2022-03-19 00:16:41,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa5becd9/6276a937080c4bcf9162de888c0cfecc [2022-03-19 00:16:41,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 00:16:41,505 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-19 00:16:41,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 00:16:41,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 00:16:41,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 00:16:41,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:41,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d9779a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41, skipping insertion in model container [2022-03-19 00:16:41,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:41,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 00:16:41,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 00:16:41,648 WARN L230 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/hard-u_unwindbound2.c[537,550] [2022-03-19 00:16:41,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 00:16:41,684 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 00:16:41,691 WARN L230 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/hard-u_unwindbound2.c[537,550] [2022-03-19 00:16:41,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 00:16:41,704 INFO L208 MainTranslator]: Completed translation [2022-03-19 00:16:41,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41 WrapperNode [2022-03-19 00:16:41,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 00:16:41,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 00:16:41,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 00:16:41,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 00:16:41,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:41,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:41,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:41,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:41,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:41,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:41,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:41,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 00:16:41,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 00:16:41,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 00:16:41,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 00:16:41,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:41,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 00:16:41,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:16:41,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 00:16:41,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 00:16:41,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 00:16:41,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 00:16:41,789 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 00:16:41,789 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 00:16:41,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 00:16:41,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 00:16:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 00:16:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 00:16:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 00:16:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 00:16:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 00:16:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 00:16:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 00:16:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 00:16:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 00:16:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 00:16:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 00:16:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 00:16:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 00:16:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 00:16:41,841 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 00:16:41,842 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 00:16:41,966 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 00:16:41,971 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 00:16:41,971 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 00:16:41,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:16:41 BoogieIcfgContainer [2022-03-19 00:16:41,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 00:16:41,974 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-19 00:16:41,974 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-19 00:16:41,975 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-19 00:16:41,976 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:16:41" (1/1) ... [2022-03-19 00:16:42,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 12:16:41 BasicIcfg [2022-03-19 00:16:42,000 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-19 00:16:42,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 00:16:42,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 00:16:42,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 00:16:42,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 12:16:41" (1/4) ... [2022-03-19 00:16:42,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd773c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:16:42, skipping insertion in model container [2022-03-19 00:16:42,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:16:41" (2/4) ... [2022-03-19 00:16:42,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd773c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:16:42, skipping insertion in model container [2022-03-19 00:16:42,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:16:41" (3/4) ... [2022-03-19 00:16:42,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd773c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 12:16:42, skipping insertion in model container [2022-03-19 00:16:42,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 12:16:41" (4/4) ... [2022-03-19 00:16:42,012 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.cqvasr [2022-03-19 00:16:42,016 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 00:16:42,017 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 00:16:42,049 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 00:16:42,053 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 00:16:42,054 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 00:16:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 00:16:42,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 00:16:42,068 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:42,068 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:16:42,068 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:42,072 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-03-19 00:16:42,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:42,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741873490] [2022-03-19 00:16:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:42,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:42,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 00:16:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:42,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 00:16:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:16:42,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:16:42,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741873490] [2022-03-19 00:16:42,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741873490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:16:42,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:16:42,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 00:16:42,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296115596] [2022-03-19 00:16:42,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:16:42,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 00:16:42,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:16:42,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 00:16:42,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 00:16:42,288 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 00:16:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:42,379 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-19 00:16:42,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 00:16:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-19 00:16:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:42,389 INFO L225 Difference]: With dead ends: 66 [2022-03-19 00:16:42,390 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 00:16:42,393 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 00:16:42,398 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:42,398 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:16:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 00:16:42,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-19 00:16:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 00:16:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-19 00:16:42,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-19 00:16:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:42,426 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-19 00:16:42,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 00:16:42,427 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-19 00:16:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 00:16:42,427 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:42,427 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:16:42,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 00:16:42,428 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-03-19 00:16:42,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:42,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269264057] [2022-03-19 00:16:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:42,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:42,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 00:16:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:42,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 00:16:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:16:42,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:16:42,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269264057] [2022-03-19 00:16:42,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269264057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:16:42,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:16:42,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 00:16:42,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841341741] [2022-03-19 00:16:42,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:16:42,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 00:16:42,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:16:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 00:16:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:16:42,557 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 00:16:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:42,795 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-19 00:16:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 00:16:42,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-19 00:16:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:42,803 INFO L225 Difference]: With dead ends: 47 [2022-03-19 00:16:42,804 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 00:16:42,806 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:16:42,807 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:42,808 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 00:16:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 00:16:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-19 00:16:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 00:16:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-19 00:16:42,818 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-19 00:16:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:42,818 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-19 00:16:42,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-19 00:16:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-19 00:16:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 00:16:42,822 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:42,822 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:16:42,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 00:16:42,823 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-03-19 00:16:42,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:42,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76110911] [2022-03-19 00:16:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:42,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:42,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:16:42,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675346596] [2022-03-19 00:16:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:42,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:42,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:16:42,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:16:42,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 00:16:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:42,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 00:16:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:16:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:16:43,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:16:43,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:16:43,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76110911] [2022-03-19 00:16:43,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:16:43,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675346596] [2022-03-19 00:16:43,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675346596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:16:43,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:16:43,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 00:16:43,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752501836] [2022-03-19 00:16:43,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:16:43,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 00:16:43,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:16:43,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 00:16:43,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 00:16:43,018 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 00:16:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:43,031 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-03-19 00:16:43,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 00:16:43,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-19 00:16:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:43,034 INFO L225 Difference]: With dead ends: 52 [2022-03-19 00:16:43,035 INFO L226 Difference]: Without dead ends: 38 [2022-03-19 00:16:43,035 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 00:16:43,036 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:43,037 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:16:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-19 00:16:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-19 00:16:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 00:16:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-19 00:16:43,044 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-19 00:16:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:43,045 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-19 00:16:43,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 00:16:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-19 00:16:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 00:16:43,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:43,046 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:16:43,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 00:16:43,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:43,264 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:43,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-03-19 00:16:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:43,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27808891] [2022-03-19 00:16:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:43,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:43,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 00:16:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:43,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 00:16:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:43,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 00:16:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 00:16:43,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:16:43,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27808891] [2022-03-19 00:16:43,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27808891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:16:43,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:16:43,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 00:16:43,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145617797] [2022-03-19 00:16:43,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:16:43,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 00:16:43,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:16:43,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 00:16:43,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:16:43,420 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 00:16:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:43,555 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-19 00:16:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 00:16:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 00:16:43,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:43,557 INFO L225 Difference]: With dead ends: 52 [2022-03-19 00:16:43,557 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 00:16:43,558 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 00:16:43,559 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:43,559 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:16:43,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 00:16:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-19 00:16:43,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 00:16:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-19 00:16:43,566 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-19 00:16:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:43,566 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-19 00:16:43,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 00:16:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-19 00:16:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 00:16:43,567 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:43,567 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:16:43,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 00:16:43,567 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-03-19 00:16:43,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:43,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425803568] [2022-03-19 00:16:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:43,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:43,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:16:43,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020771853] [2022-03-19 00:16:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:43,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:43,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:16:43,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:16:43,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 00:16:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:43,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 00:16:43,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:16:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 00:16:43,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:16:43,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:16:43,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425803568] [2022-03-19 00:16:43,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:16:43,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020771853] [2022-03-19 00:16:43,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020771853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:16:43,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:16:43,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 00:16:43,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157927669] [2022-03-19 00:16:43,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:16:43,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:16:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:16:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:16:43,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:16:43,734 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-03-19 00:16:45,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-19 00:16:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:45,953 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-03-19 00:16:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:16:45,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 28 [2022-03-19 00:16:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:45,954 INFO L225 Difference]: With dead ends: 59 [2022-03-19 00:16:45,955 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 00:16:45,955 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:16:45,955 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:45,956 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 00:16:45,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 00:16:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-19 00:16:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 00:16:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-03-19 00:16:45,963 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-03-19 00:16:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:45,963 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-03-19 00:16:45,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-03-19 00:16:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-03-19 00:16:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 00:16:45,964 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:45,964 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:16:45,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 00:16:46,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:46,182 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-03-19 00:16:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:46,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865880784] [2022-03-19 00:16:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:46,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:16:46,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559421391] [2022-03-19 00:16:46,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:46,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:46,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:16:46,197 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:16:46,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 00:16:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 00:16:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:16:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 00:16:46,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:16:46,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:16:46,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865880784] [2022-03-19 00:16:46,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:16:46,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559421391] [2022-03-19 00:16:46,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559421391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:16:46,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:16:46,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 00:16:46,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058779360] [2022-03-19 00:16:46,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:16:46,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:16:46,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:16:46,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:16:46,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:16:46,404 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 00:16:46,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:46,471 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-03-19 00:16:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:16:46,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-03-19 00:16:46,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:46,473 INFO L225 Difference]: With dead ends: 76 [2022-03-19 00:16:46,474 INFO L226 Difference]: Without dead ends: 69 [2022-03-19 00:16:46,474 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:16:46,475 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:46,475 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:16:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-19 00:16:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-19 00:16:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 00:16:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-03-19 00:16:46,484 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-03-19 00:16:46,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:46,484 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-03-19 00:16:46,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 00:16:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-03-19 00:16:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 00:16:46,485 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:46,485 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:16:46,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 00:16:46,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:46,712 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:46,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:46,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-03-19 00:16:46,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:46,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661032962] [2022-03-19 00:16:46,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:46,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:46,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:16:46,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703507989] [2022-03-19 00:16:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:46,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:46,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:16:46,723 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:16:46,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 00:16:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:46,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 00:16:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:16:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 00:16:46,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 00:16:46,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:16:46,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661032962] [2022-03-19 00:16:46,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:16:46,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703507989] [2022-03-19 00:16:46,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703507989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 00:16:46,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 00:16:46,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 00:16:46,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604007794] [2022-03-19 00:16:46,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:16:46,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 00:16:46,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:16:46,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 00:16:46,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:16:46,975 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 00:16:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:47,129 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-03-19 00:16:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 00:16:47,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-19 00:16:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:47,131 INFO L225 Difference]: With dead ends: 82 [2022-03-19 00:16:47,131 INFO L226 Difference]: Without dead ends: 79 [2022-03-19 00:16:47,131 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 00:16:47,132 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:47,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 00:16:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-19 00:16:47,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-19 00:16:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 00:16:47,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-03-19 00:16:47,143 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-03-19 00:16:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:47,143 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-03-19 00:16:47,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 00:16:47,143 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-03-19 00:16:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 00:16:47,147 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:47,148 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:16:47,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 00:16:47,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:47,348 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:47,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-03-19 00:16:47,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:47,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739235152] [2022-03-19 00:16:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:47,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:47,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:16:47,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262094276] [2022-03-19 00:16:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:47,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:47,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:16:47,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:16:47,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 00:16:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:47,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 00:16:47,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:16:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 00:16:47,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:16:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 00:16:47,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:16:47,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739235152] [2022-03-19 00:16:47,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:16:47,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262094276] [2022-03-19 00:16:47,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262094276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 00:16:47,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 00:16:47,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-19 00:16:47,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729506487] [2022-03-19 00:16:47,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 00:16:47,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 00:16:47,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:16:47,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 00:16:47,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 00:16:47,580 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 00:16:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:47,626 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2022-03-19 00:16:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 00:16:47,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 38 [2022-03-19 00:16:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:47,628 INFO L225 Difference]: With dead ends: 94 [2022-03-19 00:16:47,629 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 00:16:47,629 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 00:16:47,630 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:47,630 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 116 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 00:16:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 00:16:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-19 00:16:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 00:16:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-03-19 00:16:47,639 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 38 [2022-03-19 00:16:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:47,639 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-03-19 00:16:47,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 00:16:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-03-19 00:16:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 00:16:47,640 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:47,640 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:16:47,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 00:16:47,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:47,860 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-03-19 00:16:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:47,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843109424] [2022-03-19 00:16:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:47,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:47,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:16:47,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053968896] [2022-03-19 00:16:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:47,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:47,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:16:47,893 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:16:47,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 00:16:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 00:16:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 00:16:48,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 00:16:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 00:16:48,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 00:16:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 00:16:48,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 00:16:48,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843109424] [2022-03-19 00:16:48,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 00:16:48,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053968896] [2022-03-19 00:16:48,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053968896] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 00:16:48,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 00:16:48,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-19 00:16:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151831015] [2022-03-19 00:16:48,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 00:16:48,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 00:16:48,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 00:16:48,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 00:16:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 00:16:48,457 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 00:16:50,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:16:52,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:16:54,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:16:56,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 00:16:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 00:16:57,133 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-03-19 00:16:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 00:16:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-03-19 00:16:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 00:16:57,135 INFO L225 Difference]: With dead ends: 93 [2022-03-19 00:16:57,135 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 00:16:57,136 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 00:16:57,136 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-03-19 00:16:57,136 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 179 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 4 Unknown, 0 Unchecked, 8.7s Time] [2022-03-19 00:16:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 00:16:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-03-19 00:16:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 59 states have internal predecessors, (67), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 00:16:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2022-03-19 00:16:57,147 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 46 [2022-03-19 00:16:57,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 00:16:57,148 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2022-03-19 00:16:57,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 00:16:57,148 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2022-03-19 00:16:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 00:16:57,149 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 00:16:57,149 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 00:16:57,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 00:16:57,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:57,354 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 00:16:57,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 00:16:57,355 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-03-19 00:16:57,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 00:16:57,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014520793] [2022-03-19 00:16:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 00:16:57,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 00:16:57,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172559157] [2022-03-19 00:16:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 00:16:57,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 00:16:57,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 00:16:57,372 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 00:16:57,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process