/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/ps6-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 11:53:32,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 11:53:32,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 11:53:32,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 11:53:32,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 11:53:32,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 11:53:32,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 11:53:32,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 11:53:32,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 11:53:32,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 11:53:32,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 11:53:32,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 11:53:32,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 11:53:32,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 11:53:32,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 11:53:32,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 11:53:32,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 11:53:32,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 11:53:32,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 11:53:32,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 11:53:32,657 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 11:53:32,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 11:53:32,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 11:53:32,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 11:53:32,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 11:53:32,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 11:53:32,665 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 11:53:32,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 11:53:32,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 11:53:32,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 11:53:32,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-20 11:53:32,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 11:53:32,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 11:53:32,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 11:53:32,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 11:53:32,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 11:53:32,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 11:53:32,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 11:53:32,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 11:53:32,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 11:53:32,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 11:53:32,693 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 11:53:32,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 11:53:32,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 11:53:32,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 11:53:32,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 11:53:32,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 11:53:32,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 11:53:32,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 11:53:32,694 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 11:53:32,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 11:53:32,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 11:53:32,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 11:53:32,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 11:53:32,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:53:32,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 11:53:32,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 11:53:32,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 11:53:32,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 11:53:32,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 11:53:32,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 11:53:32,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 11:53:32,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 11:53:32,697 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 11:53:32,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 11:53:32,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 11:53:32,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 11:53:32,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 11:53:32,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 11:53:32,910 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 11:53:32,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound100.c [2022-03-20 11:53:32,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29a5ec3e7/dc0b7e8a96ac43d086d043baf19d6a55/FLAGe9975cd49 [2022-03-20 11:53:33,293 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 11:53:33,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound100.c [2022-03-20 11:53:33,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29a5ec3e7/dc0b7e8a96ac43d086d043baf19d6a55/FLAGe9975cd49 [2022-03-20 11:53:33,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29a5ec3e7/dc0b7e8a96ac43d086d043baf19d6a55 [2022-03-20 11:53:33,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 11:53:33,308 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 11:53:33,309 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 11:53:33,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 11:53:33,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 11:53:33,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5f5af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33, skipping insertion in model container [2022-03-20 11:53:33,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 11:53:33,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 11:53:33,439 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/ps6-ll_unwindbound100.c[458,471] [2022-03-20 11:53:33,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:53:33,468 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 11:53:33,478 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/ps6-ll_unwindbound100.c[458,471] [2022-03-20 11:53:33,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:53:33,496 INFO L208 MainTranslator]: Completed translation [2022-03-20 11:53:33,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33 WrapperNode [2022-03-20 11:53:33,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 11:53:33,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 11:53:33,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 11:53:33,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 11:53:33,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 11:53:33,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 11:53:33,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 11:53:33,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 11:53:33,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:53:33,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:33,549 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) [2022-03-20 11:53:33,567 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 [2022-03-20 11:53:33,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 11:53:33,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 11:53:33,595 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 11:53:33,595 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 11:53:33,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 11:53:33,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 11:53:33,596 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 11:53:33,597 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 11:53:33,597 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 11:53:33,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 11:53:33,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-20 11:53:33,597 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 11:53:33,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 11:53:33,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 11:53:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 11:53:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 11:53:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 11:53:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 11:53:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 11:53:33,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 11:53:33,642 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 11:53:33,643 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 11:53:33,761 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 11:53:33,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 11:53:33,765 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 11:53:33,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:53:33 BoogieIcfgContainer [2022-03-20 11:53:33,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 11:53:33,766 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 11:53:33,766 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 11:53:33,778 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 11:53:33,780 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:53:33" (1/1) ... [2022-03-20 11:53:33,781 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 11:53:33,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:53:33 BasicIcfg [2022-03-20 11:53:33,807 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 11:53:33,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 11:53:33,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 11:53:33,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 11:53:33,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:53:33" (1/4) ... [2022-03-20 11:53:33,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4393be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:53:33, skipping insertion in model container [2022-03-20 11:53:33,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:53:33" (2/4) ... [2022-03-20 11:53:33,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4393be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:53:33, skipping insertion in model container [2022-03-20 11:53:33,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:53:33" (3/4) ... [2022-03-20 11:53:33,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4393be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:53:33, skipping insertion in model container [2022-03-20 11:53:33,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:53:33" (4/4) ... [2022-03-20 11:53:33,839 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound100.cqvasr [2022-03-20 11:53:33,843 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 11:53:33,843 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 11:53:33,885 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 11:53:33,893 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 [2022-03-20 11:53:33,893 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 11:53:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:53:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 11:53:33,914 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:33,915 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:33,915 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:33,921 INFO L85 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2022-03-20 11:53:33,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:33,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396457538] [2022-03-20 11:53:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:33,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:53:34,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 11:53:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:53:34,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 11:53:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:53:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:53:34,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:34,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396457538] [2022-03-20 11:53:34,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396457538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:53:34,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:53:34,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 11:53:34,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381720090] [2022-03-20 11:53:34,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:53:34,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 11:53:34,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:34,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 11:53:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:53:34,132 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2022-03-20 11:53:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:34,208 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-20 11:53:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 11:53:34,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 17 [2022-03-20 11:53:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:34,215 INFO L225 Difference]: With dead ends: 50 [2022-03-20 11:53:34,216 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 11:53:34,218 INFO L912 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 [2022-03-20 11:53:34,222 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:34,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:53:34,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 11:53:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-20 11:53:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 11:53:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 11:53:34,251 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-03-20 11:53:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:34,252 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 11:53:34,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2022-03-20 11:53:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 11:53:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 11:53:34,253 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:34,253 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:34,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 11:53:34,254 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2022-03-20 11:53:34,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:34,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623116525] [2022-03-20 11:53:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:34,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:34,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446343420] [2022-03-20 11:53:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:34,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:34,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:34,304 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) [2022-03-20 11:53:34,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 11:53:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:53:34,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 11:53:34,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:53:34,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:53:34,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:34,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623116525] [2022-03-20 11:53:34,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:34,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446343420] [2022-03-20 11:53:34,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446343420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:53:34,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:53:34,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 11:53:34,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663938561] [2022-03-20 11:53:34,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:53:34,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 11:53:34,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 11:53:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 11:53:34,488 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-03-20 11:53:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:34,497 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 11:53:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 11:53:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 18 [2022-03-20 11:53:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:34,498 INFO L225 Difference]: With dead ends: 34 [2022-03-20 11:53:34,498 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 11:53:34,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 11:53:34,500 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:34,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:53:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 11:53:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 11:53:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 11:53:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-03-20 11:53:34,505 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-03-20 11:53:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:34,505 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-03-20 11:53:34,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-03-20 11:53:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-03-20 11:53:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 11:53:34,505 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:34,506 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:34,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 11:53:34,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:34,726 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2022-03-20 11:53:34,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:34,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050474041] [2022-03-20 11:53:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:34,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:34,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:34,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671879359] [2022-03-20 11:53:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:34,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:34,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:34,751 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) [2022-03-20 11:53:34,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 11:53:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:53:34,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 11:53:34,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:53:34,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:53:34,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:34,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050474041] [2022-03-20 11:53:34,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:34,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671879359] [2022-03-20 11:53:34,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671879359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:53:34,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:53:34,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 11:53:34,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695864956] [2022-03-20 11:53:34,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:53:34,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:53:34,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:34,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:53:34,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 11:53:34,861 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:53:35,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:35,016 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-03-20 11:53:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:53:35,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 [2022-03-20 11:53:35,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:35,017 INFO L225 Difference]: With dead ends: 36 [2022-03-20 11:53:35,017 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 11:53:35,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 11:53:35,018 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:35,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:53:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 11:53:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 11:53:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:53:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 11:53:35,023 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-20 11:53:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:35,024 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 11:53:35,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 11:53:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 11:53:35,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 11:53:35,024 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:35,024 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:35,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 11:53:35,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 11:53:35,225 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:35,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2022-03-20 11:53:35,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:35,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41753087] [2022-03-20 11:53:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:35,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:35,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:35,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622438278] [2022-03-20 11:53:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:35,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:35,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:35,239 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) [2022-03-20 11:53:35,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 11:53:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:53:35,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 11:53:35,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:53:35,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:53:35,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41753087] [2022-03-20 11:53:35,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:35,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622438278] [2022-03-20 11:53:35,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622438278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:53:35,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:53:35,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 11:53:35,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590899989] [2022-03-20 11:53:35,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:53:35,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 11:53:35,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 11:53:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 11:53:35,488 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 11:53:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:35,667 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-03-20 11:53:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 11:53:35,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-03-20 11:53:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:35,669 INFO L225 Difference]: With dead ends: 66 [2022-03-20 11:53:35,669 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 11:53:35,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 11:53:35,670 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:35,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 106 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 11:53:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 11:53:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-03-20 11:53:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 11:53:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-03-20 11:53:35,677 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 26 [2022-03-20 11:53:35,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:35,677 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-03-20 11:53:35,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 11:53:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-03-20 11:53:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 11:53:35,678 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:35,678 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:35,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 11:53:35,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:35,891 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:35,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2022-03-20 11:53:35,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:35,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795276844] [2022-03-20 11:53:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:35,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:35,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:35,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948807594] [2022-03-20 11:53:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:35,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:35,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:35,904 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) [2022-03-20 11:53:35,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 11:53:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:53:35,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 11:53:35,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 11:53:36,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 11:53:36,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:36,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795276844] [2022-03-20 11:53:36,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:36,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948807594] [2022-03-20 11:53:36,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948807594] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 11:53:36,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:53:36,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 11:53:36,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179176912] [2022-03-20 11:53:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:53:36,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 11:53:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 11:53:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 11:53:36,118 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 11:53:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:36,142 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-03-20 11:53:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 11:53:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 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 26 [2022-03-20 11:53:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:36,144 INFO L225 Difference]: With dead ends: 68 [2022-03-20 11:53:36,144 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 11:53:36,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 11:53:36,145 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:36,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 79 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:53:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 11:53:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-03-20 11:53:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 11:53:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-20 11:53:36,153 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 26 [2022-03-20 11:53:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:36,153 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-20 11:53:36,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 11:53:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-20 11:53:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 11:53:36,154 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:36,154 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:36,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 11:53:36,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:36,358 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:36,359 INFO L85 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2022-03-20 11:53:36,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:36,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614614089] [2022-03-20 11:53:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:36,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:36,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253903687] [2022-03-20 11:53:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:36,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:36,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:36,369 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) [2022-03-20 11:53:36,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 11:53:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:53:36,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 11:53:36,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 11:53:36,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614614089] [2022-03-20 11:53:36,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253903687] [2022-03-20 11:53:36,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253903687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:53:36,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:53:36,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 11:53:36,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078049499] [2022-03-20 11:53:36,670 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:53:36,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 11:53:36,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:36,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 11:53:36,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:53:36,670 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 11:53:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:36,716 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-03-20 11:53:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 11:53:36,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-20 11:53:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:36,718 INFO L225 Difference]: With dead ends: 59 [2022-03-20 11:53:36,718 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 11:53:36,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:53:36,719 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:36,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 159 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:53:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 11:53:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-20 11:53:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:53:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-03-20 11:53:36,726 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 37 [2022-03-20 11:53:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:36,726 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-03-20 11:53:36,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 11:53:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-03-20 11:53:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 11:53:36,727 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:36,727 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:36,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 11:53:36,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:36,948 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:36,952 INFO L85 PathProgramCache]: Analyzing trace with hash -678596118, now seen corresponding path program 2 times [2022-03-20 11:53:36,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:36,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737706846] [2022-03-20 11:53:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:36,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:36,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:36,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506944639] [2022-03-20 11:53:36,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:53:36,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:36,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:36,962 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) [2022-03-20 11:53:36,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 11:53:37,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:53:37,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:53:37,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 11:53:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 11:53:37,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:37,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737706846] [2022-03-20 11:53:37,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:37,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506944639] [2022-03-20 11:53:37,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506944639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:53:37,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:53:37,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 11:53:37,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363327192] [2022-03-20 11:53:37,355 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:53:37,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 11:53:37,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 11:53:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 11:53:37,356 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 11:53:37,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:37,414 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-03-20 11:53:37,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 11:53:37,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-03-20 11:53:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:37,416 INFO L225 Difference]: With dead ends: 58 [2022-03-20 11:53:37,416 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 11:53:37,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 11:53:37,417 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:37,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 206 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:53:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 11:53:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-20 11:53:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 11:53:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-03-20 11:53:37,423 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2022-03-20 11:53:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:37,424 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-03-20 11:53:37,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 11:53:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-03-20 11:53:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 11:53:37,425 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:37,425 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:37,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 11:53:37,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:37,630 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1280010632, now seen corresponding path program 3 times [2022-03-20 11:53:37,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:37,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745348365] [2022-03-20 11:53:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:37,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:37,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:37,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925693280] [2022-03-20 11:53:37,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:53:37,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:37,641 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) [2022-03-20 11:53:37,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 11:53:38,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 11:53:38,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:53:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 11:53:38,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 11:53:38,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:38,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:38,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745348365] [2022-03-20 11:53:38,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:38,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925693280] [2022-03-20 11:53:38,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925693280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:53:38,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:53:38,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 11:53:38,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422601099] [2022-03-20 11:53:38,344 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:53:38,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 11:53:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 11:53:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:53:38,345 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 11:53:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:38,430 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-20 11:53:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 11:53:38,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 53 [2022-03-20 11:53:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:38,431 INFO L225 Difference]: With dead ends: 60 [2022-03-20 11:53:38,431 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 11:53:38,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:53:38,432 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:38,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 259 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:53:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 11:53:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 11:53:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 11:53:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-20 11:53:38,437 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 53 [2022-03-20 11:53:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:38,437 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-20 11:53:38,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 11:53:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-20 11:53:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 11:53:38,438 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:38,438 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:38,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 11:53:38,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:38,643 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1735624483, now seen corresponding path program 1 times [2022-03-20 11:53:38,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:38,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400736658] [2022-03-20 11:53:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:38,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:38,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:38,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853086439] [2022-03-20 11:53:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:38,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:38,672 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:53:38,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 11:53:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:53:38,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 11:53:38,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 11:53:38,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 11:53:38,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:38,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400736658] [2022-03-20 11:53:38,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:38,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853086439] [2022-03-20 11:53:38,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853086439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:53:38,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:53:38,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 11:53:38,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019747960] [2022-03-20 11:53:38,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:53:38,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 11:53:38,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 11:53:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:53:38,983 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-20 11:53:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:39,142 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2022-03-20 11:53:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 11:53:39,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 55 [2022-03-20 11:53:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:39,144 INFO L225 Difference]: With dead ends: 140 [2022-03-20 11:53:39,144 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 11:53:39,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 11:53:39,145 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 110 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:39,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 157 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:53:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 11:53:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2022-03-20 11:53:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 77 states have internal predecessors, (79), 20 states have call successors, (20), 14 states have call predecessors, (20), 12 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 11:53:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2022-03-20 11:53:39,173 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 55 [2022-03-20 11:53:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:39,173 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2022-03-20 11:53:39,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-03-20 11:53:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2022-03-20 11:53:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 11:53:39,174 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:39,174 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:39,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 11:53:39,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 11:53:39,388 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1029628710, now seen corresponding path program 4 times [2022-03-20 11:53:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:39,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063949188] [2022-03-20 11:53:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:39,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:39,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353452410] [2022-03-20 11:53:39,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 11:53:39,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:39,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:39,397 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:53:39,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 11:53:39,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 11:53:39,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:53:39,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 11:53:39,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 11:53:39,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:39,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:39,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063949188] [2022-03-20 11:53:39,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:39,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353452410] [2022-03-20 11:53:39,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353452410] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:53:39,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:53:39,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 11:53:39,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813908132] [2022-03-20 11:53:39,724 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:53:39,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 11:53:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 11:53:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 11:53:39,725 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 11:53:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:39,817 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-03-20 11:53:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 11:53:39,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 61 [2022-03-20 11:53:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:39,818 INFO L225 Difference]: With dead ends: 110 [2022-03-20 11:53:39,818 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 11:53:39,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-20 11:53:39,819 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:39,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 318 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:53:39,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 11:53:39,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-20 11:53:39,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 76 states have internal predecessors, (78), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 11:53:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2022-03-20 11:53:39,829 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 61 [2022-03-20 11:53:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:39,829 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2022-03-20 11:53:39,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 11:53:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2022-03-20 11:53:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 11:53:39,829 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:39,830 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:39,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 11:53:40,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 11:53:40,039 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1176886980, now seen corresponding path program 5 times [2022-03-20 11:53:40,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:40,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546092340] [2022-03-20 11:53:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:40,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:40,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:40,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132557572] [2022-03-20 11:53:40,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 11:53:40,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:40,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:40,052 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:53:40,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 11:53:40,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 11:53:40,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:53:40,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 11:53:40,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 11:53:40,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:40,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:40,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546092340] [2022-03-20 11:53:40,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:40,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132557572] [2022-03-20 11:53:40,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132557572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:53:40,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:53:40,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 11:53:40,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588972898] [2022-03-20 11:53:40,807 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:53:40,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 11:53:40,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:40,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 11:53:40,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-20 11:53:40,808 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 11:53:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:40,885 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-03-20 11:53:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 11:53:40,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2022-03-20 11:53:40,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:40,886 INFO L225 Difference]: With dead ends: 109 [2022-03-20 11:53:40,886 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 11:53:40,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 11:53:40,887 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:40,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 383 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:53:40,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 11:53:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 11:53:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 18 states have call successors, (18), 14 states have call predecessors, (18), 12 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 11:53:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2022-03-20 11:53:40,894 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 69 [2022-03-20 11:53:40,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:40,894 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2022-03-20 11:53:40,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 11:53:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2022-03-20 11:53:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 11:53:40,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:40,895 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:40,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 11:53:41,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 11:53:41,100 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1006740382, now seen corresponding path program 6 times [2022-03-20 11:53:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:41,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455358037] [2022-03-20 11:53:41,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:41,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:41,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:41,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134114360] [2022-03-20 11:53:41,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 11:53:41,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:41,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:41,109 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:53:41,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 11:53:46,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 11:53:46,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:53:46,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 11:53:46,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 11:53:46,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:47,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:47,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455358037] [2022-03-20 11:53:47,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:47,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134114360] [2022-03-20 11:53:47,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134114360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:53:47,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:53:47,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 11:53:47,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087325005] [2022-03-20 11:53:47,058 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:53:47,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 11:53:47,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:47,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 11:53:47,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-20 11:53:47,058 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 11:53:47,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:47,179 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-03-20 11:53:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 11:53:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 77 [2022-03-20 11:53:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:47,180 INFO L225 Difference]: With dead ends: 108 [2022-03-20 11:53:47,180 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 11:53:47,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-20 11:53:47,181 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:47,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 454 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:53:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 11:53:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-20 11:53:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 14 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 11:53:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2022-03-20 11:53:47,188 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 77 [2022-03-20 11:53:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:47,188 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2022-03-20 11:53:47,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 11:53:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2022-03-20 11:53:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 11:53:47,189 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:47,189 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:47,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 11:53:47,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 11:53:47,412 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:47,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:47,412 INFO L85 PathProgramCache]: Analyzing trace with hash -700032000, now seen corresponding path program 7 times [2022-03-20 11:53:47,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:47,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131876598] [2022-03-20 11:53:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:47,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:47,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:47,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119400030] [2022-03-20 11:53:47,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 11:53:47,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:47,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:47,435 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:53:47,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 11:53:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:53:48,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 11:53:48,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 11:53:48,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:48,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:48,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131876598] [2022-03-20 11:53:48,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:48,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119400030] [2022-03-20 11:53:48,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119400030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:53:48,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:53:48,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-20 11:53:48,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704039316] [2022-03-20 11:53:48,839 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:53:48,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 11:53:48,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 11:53:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-20 11:53:48,839 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 11:53:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:48,985 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-03-20 11:53:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 11:53:48,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 85 [2022-03-20 11:53:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:48,986 INFO L225 Difference]: With dead ends: 107 [2022-03-20 11:53:48,986 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 11:53:48,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-20 11:53:48,987 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:48,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 531 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:53:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 11:53:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 11:53:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 11:53:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-03-20 11:53:48,993 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 85 [2022-03-20 11:53:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:48,993 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-03-20 11:53:48,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 11:53:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-03-20 11:53:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 11:53:48,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:48,994 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:49,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 11:53:49,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 11:53:49,194 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:49,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1583078814, now seen corresponding path program 8 times [2022-03-20 11:53:49,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:49,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747019644] [2022-03-20 11:53:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:49,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:49,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:49,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313076161] [2022-03-20 11:53:49,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 11:53:49,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:49,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:49,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:53:49,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 11:53:50,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 11:53:50,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 11:53:50,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 11:53:50,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:53:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 11:53:50,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:53:50,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:53:50,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747019644] [2022-03-20 11:53:50,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:53:50,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313076161] [2022-03-20 11:53:50,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313076161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 11:53:50,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 11:53:50,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 11:53:50,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441507065] [2022-03-20 11:53:50,589 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 11:53:50,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 11:53:50,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:53:50,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 11:53:50,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 11:53:50,590 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 11:53:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:53:50,756 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-03-20 11:53:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 11:53:50,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 93 [2022-03-20 11:53:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:53:50,757 INFO L225 Difference]: With dead ends: 106 [2022-03-20 11:53:50,757 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 11:53:50,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-20 11:53:50,757 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 11:53:50,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 614 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 11:53:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 11:53:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-20 11:53:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 11:53:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-03-20 11:53:50,763 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2022-03-20 11:53:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:53:50,763 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-03-20 11:53:50,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 11:53:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-03-20 11:53:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 11:53:50,764 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:53:50,764 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:53:50,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 11:53:50,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 11:53:50,965 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:53:50,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:53:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash -6495940, now seen corresponding path program 9 times [2022-03-20 11:53:50,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:53:50,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236937986] [2022-03-20 11:53:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:53:50,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:53:50,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:53:50,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212719535] [2022-03-20 11:53:50,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 11:53:50,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:53:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:53:50,982 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 11:53:51,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process