./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 13:54:34,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 13:54:34,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 13:54:34,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 13:54:34,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 13:54:34,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 13:54:34,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 13:54:34,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 13:54:34,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 13:54:34,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 13:54:34,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 13:54:34,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 13:54:34,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 13:54:34,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 13:54:34,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 13:54:34,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 13:54:34,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 13:54:34,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 13:54:34,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 13:54:34,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 13:54:34,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 13:54:34,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 13:54:34,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 13:54:34,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 13:54:34,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 13:54:34,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 13:54:34,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 13:54:34,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 13:54:34,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 13:54:34,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 13:54:34,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 13:54:34,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 13:54:34,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 13:54:34,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 13:54:34,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 13:54:34,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 13:54:34,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 13:54:34,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 13:54:34,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 13:54:34,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 13:54:34,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 13:54:34,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 13:54:34,660 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 13:54:34,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 13:54:34,661 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 13:54:34,661 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 13:54:34,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 13:54:34,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 13:54:34,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 13:54:34,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 13:54:34,663 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 13:54:34,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 13:54:34,663 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 13:54:34,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 13:54:34,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 13:54:34,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 13:54:34,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 13:54:34,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 13:54:34,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 13:54:34,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 13:54:34,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 13:54:34,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 13:54:34,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 13:54:34,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 13:54:34,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 13:54:34,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 13:54:34,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 13:54:34,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 13:54:34,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 13:54:34,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 13:54:34,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 13:54:34,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 13:54:34,666 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 13:54:34,666 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 13:54:34,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 13:54:34,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 13:54:34,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 [2021-12-17 13:54:34,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 13:54:34,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 13:54:34,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 13:54:34,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 13:54:34,895 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 13:54:34,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-12-17 13:54:34,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3414e656a/b8429405925a42de88487cbc77a1490b/FLAG8d26462b3 [2021-12-17 13:54:35,297 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 13:54:35,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-12-17 13:54:35,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3414e656a/b8429405925a42de88487cbc77a1490b/FLAG8d26462b3 [2021-12-17 13:54:35,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3414e656a/b8429405925a42de88487cbc77a1490b [2021-12-17 13:54:35,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 13:54:35,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 13:54:35,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 13:54:35,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 13:54:35,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 13:54:35,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:35,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ea93d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35, skipping insertion in model container [2021-12-17 13:54:35,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:35,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 13:54:35,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 13:54:35,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-12-17 13:54:35,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 13:54:35,932 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 13:54:35,942 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-12-17 13:54:35,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 13:54:35,969 INFO L208 MainTranslator]: Completed translation [2021-12-17 13:54:35,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35 WrapperNode [2021-12-17 13:54:35,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 13:54:35,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 13:54:35,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 13:54:35,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 13:54:35,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:35,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:36,003 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2021-12-17 13:54:36,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 13:54:36,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 13:54:36,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 13:54:36,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 13:54:36,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:36,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:36,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:36,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:36,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:36,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:36,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:36,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 13:54:36,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 13:54:36,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 13:54:36,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 13:54:36,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (1/1) ... [2021-12-17 13:54:36,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 13:54:36,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:36,077 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) [2021-12-17 13:54:36,101 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 [2021-12-17 13:54:36,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 13:54:36,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 13:54:36,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 13:54:36,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 13:54:36,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 13:54:36,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 13:54:36,174 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 13:54:36,175 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 13:54:36,300 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 13:54:36,308 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 13:54:36,309 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 13:54:36,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:54:36 BoogieIcfgContainer [2021-12-17 13:54:36,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 13:54:36,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 13:54:36,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 13:54:36,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 13:54:36,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 01:54:35" (1/3) ... [2021-12-17 13:54:36,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323bf2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:54:36, skipping insertion in model container [2021-12-17 13:54:36,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 01:54:35" (2/3) ... [2021-12-17 13:54:36,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323bf2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 01:54:36, skipping insertion in model container [2021-12-17 13:54:36,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 01:54:36" (3/3) ... [2021-12-17 13:54:36,319 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2021-12-17 13:54:36,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 13:54:36,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 13:54:36,364 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 13:54:36,370 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 13:54:36,371 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 13:54:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 13:54:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 13:54:36,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:36,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:36,394 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:36,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:36,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1819788390, now seen corresponding path program 1 times [2021-12-17 13:54:36,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:36,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889847169] [2021-12-17 13:54:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:36,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:54:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 13:54:36,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:36,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889847169] [2021-12-17 13:54:36,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889847169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 13:54:36,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 13:54:36,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 13:54:36,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143837431] [2021-12-17 13:54:36,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 13:54:36,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 13:54:36,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:36,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 13:54:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 13:54:36,587 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 13:54:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:36,600 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-12-17 13:54:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 13:54:36,602 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 13:54:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:36,615 INFO L225 Difference]: With dead ends: 34 [2021-12-17 13:54:36,616 INFO L226 Difference]: Without dead ends: 14 [2021-12-17 13:54:36,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 13:54:36,622 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:36,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 13:54:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-17 13:54:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-17 13:54:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 13:54:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-12-17 13:54:36,650 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2021-12-17 13:54:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:36,650 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-12-17 13:54:36,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 13:54:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-12-17 13:54:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 13:54:36,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:36,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:36,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 13:54:36,653 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:36,654 INFO L85 PathProgramCache]: Analyzing trace with hash 178441499, now seen corresponding path program 1 times [2021-12-17 13:54:36,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:36,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682242287] [2021-12-17 13:54:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:36,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:36,678 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:36,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941397194] [2021-12-17 13:54:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:36,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:36,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:36,692 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) [2021-12-17 13:54:36,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 13:54:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:54:36,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 13:54:36,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 13:54:36,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 13:54:36,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:36,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682242287] [2021-12-17 13:54:36,810 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:36,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941397194] [2021-12-17 13:54:36,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941397194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 13:54:36,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 13:54:36,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 13:54:36,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874235241] [2021-12-17 13:54:36,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 13:54:36,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 13:54:36,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 13:54:36,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 13:54:36,817 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 13:54:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:36,834 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-12-17 13:54:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 13:54:36,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 13:54:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:36,835 INFO L225 Difference]: With dead ends: 24 [2021-12-17 13:54:36,836 INFO L226 Difference]: Without dead ends: 16 [2021-12-17 13:54:36,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 13:54:36,839 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:36,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 13:54:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-17 13:54:36,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-17 13:54:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 13:54:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-12-17 13:54:36,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2021-12-17 13:54:36,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:36,853 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-12-17 13:54:36,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 13:54:36,857 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-12-17 13:54:36,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 13:54:36,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:36,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:36,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:37,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:37,075 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash 180228959, now seen corresponding path program 1 times [2021-12-17 13:54:37,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:37,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803704570] [2021-12-17 13:54:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:37,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:37,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:37,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394851340] [2021-12-17 13:54:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:37,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:37,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:37,088 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) [2021-12-17 13:54:37,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 13:54:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:54:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 13:54:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 13:54:37,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 13:54:37,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:37,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803704570] [2021-12-17 13:54:37,182 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:37,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394851340] [2021-12-17 13:54:37,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394851340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 13:54:37,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 13:54:37,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 13:54:37,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942729974] [2021-12-17 13:54:37,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 13:54:37,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 13:54:37,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:37,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 13:54:37,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 13:54:37,192 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 13:54:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:37,241 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-12-17 13:54:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 13:54:37,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-17 13:54:37,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:37,243 INFO L225 Difference]: With dead ends: 26 [2021-12-17 13:54:37,243 INFO L226 Difference]: Without dead ends: 22 [2021-12-17 13:54:37,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 13:54:37,246 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:37,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 13:54:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-17 13:54:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-17 13:54:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 13:54:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-17 13:54:37,259 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2021-12-17 13:54:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:37,259 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-17 13:54:37,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 13:54:37,259 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-17 13:54:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 13:54:37,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:37,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:37,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:37,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 13:54:37,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash 823572993, now seen corresponding path program 1 times [2021-12-17 13:54:37,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:37,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878264075] [2021-12-17 13:54:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:37,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:37,483 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760631396] [2021-12-17 13:54:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:37,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:37,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:37,504 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) [2021-12-17 13:54:37,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 13:54:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:54:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 13:54:37,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 13:54:37,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 13:54:37,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878264075] [2021-12-17 13:54:37,639 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:37,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760631396] [2021-12-17 13:54:37,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760631396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 13:54:37,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 13:54:37,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-17 13:54:37,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311414134] [2021-12-17 13:54:37,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:37,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 13:54:37,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:37,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 13:54:37,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 13:54:37,642 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 13:54:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:37,735 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-17 13:54:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 13:54:37,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-12-17 13:54:37,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:37,737 INFO L225 Difference]: With dead ends: 56 [2021-12-17 13:54:37,737 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 13:54:37,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 13:54:37,740 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:37,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 93 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 13:54:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 13:54:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-17 13:54:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 13:54:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-12-17 13:54:37,749 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 16 [2021-12-17 13:54:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:37,750 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-12-17 13:54:37,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 13:54:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-12-17 13:54:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 13:54:37,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:37,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:37,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:37,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:37,960 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:37,960 INFO L85 PathProgramCache]: Analyzing trace with hash 825360453, now seen corresponding path program 1 times [2021-12-17 13:54:37,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:37,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439456240] [2021-12-17 13:54:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:37,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:37,965 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:37,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671450673] [2021-12-17 13:54:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:37,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:37,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:37,967 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) [2021-12-17 13:54:37,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 13:54:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:54:38,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 13:54:38,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 13:54:38,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 13:54:38,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:38,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439456240] [2021-12-17 13:54:38,362 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:38,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671450673] [2021-12-17 13:54:38,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671450673] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:38,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:38,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-17 13:54:38,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660488220] [2021-12-17 13:54:38,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 13:54:38,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 13:54:38,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:38,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 13:54:38,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 13:54:38,364 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 13:54:38,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:38,388 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-12-17 13:54:38,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 13:54:38,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-17 13:54:38,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:38,390 INFO L225 Difference]: With dead ends: 58 [2021-12-17 13:54:38,390 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 13:54:38,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 13:54:38,391 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:38,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 13:54:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 13:54:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-12-17 13:54:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 13:54:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-12-17 13:54:38,405 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 16 [2021-12-17 13:54:38,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:38,405 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-12-17 13:54:38,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 13:54:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-12-17 13:54:38,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 13:54:38,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:38,406 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:38,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:38,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:38,621 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:38,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:38,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1696898494, now seen corresponding path program 1 times [2021-12-17 13:54:38,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:38,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856037106] [2021-12-17 13:54:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:38,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:38,627 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:38,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799576873] [2021-12-17 13:54:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:38,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:38,628 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) [2021-12-17 13:54:38,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 13:54:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:54:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 13:54:38,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 13:54:38,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:38,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:38,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856037106] [2021-12-17 13:54:38,943 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:38,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799576873] [2021-12-17 13:54:38,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799576873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:38,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:38,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 13:54:38,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896137529] [2021-12-17 13:54:38,944 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:38,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 13:54:38,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:38,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 13:54:38,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 13:54:38,945 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 13:54:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:38,994 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-12-17 13:54:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 13:54:38,995 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-12-17 13:54:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:38,996 INFO L225 Difference]: With dead ends: 46 [2021-12-17 13:54:38,996 INFO L226 Difference]: Without dead ends: 41 [2021-12-17 13:54:38,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-17 13:54:38,997 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:38,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 13:54:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-17 13:54:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-17 13:54:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 13:54:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-12-17 13:54:39,002 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2021-12-17 13:54:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:39,002 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-12-17 13:54:39,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 13:54:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-12-17 13:54:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 13:54:39,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:39,003 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:39,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:39,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:39,219 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:39,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash -47987544, now seen corresponding path program 2 times [2021-12-17 13:54:39,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:39,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573308309] [2021-12-17 13:54:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:39,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:39,225 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:39,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034656744] [2021-12-17 13:54:39,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 13:54:39,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:39,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:39,229 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) [2021-12-17 13:54:39,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 13:54:39,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 13:54:39,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:39,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 13:54:39,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 13:54:39,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:39,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:39,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573308309] [2021-12-17 13:54:39,532 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:39,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034656744] [2021-12-17 13:54:39,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034656744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:39,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:39,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-17 13:54:39,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019199430] [2021-12-17 13:54:39,533 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:39,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 13:54:39,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:39,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 13:54:39,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 13:54:39,534 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 13:54:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:39,610 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-12-17 13:54:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 13:54:39,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2021-12-17 13:54:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:39,610 INFO L225 Difference]: With dead ends: 46 [2021-12-17 13:54:39,611 INFO L226 Difference]: Without dead ends: 41 [2021-12-17 13:54:39,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 13:54:39,611 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:39,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 124 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 13:54:39,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-17 13:54:39,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-17 13:54:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 13:54:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-12-17 13:54:39,615 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2021-12-17 13:54:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:39,615 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-12-17 13:54:39,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 13:54:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-12-17 13:54:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 13:54:39,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:39,616 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:39,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:39,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:39,817 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:39,819 INFO L85 PathProgramCache]: Analyzing trace with hash -584163058, now seen corresponding path program 3 times [2021-12-17 13:54:39,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:39,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272820667] [2021-12-17 13:54:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:39,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:39,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:39,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889674670] [2021-12-17 13:54:39,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 13:54:39,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:39,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:39,835 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) [2021-12-17 13:54:39,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 13:54:39,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 13:54:39,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 13:54:39,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 13:54:40,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:40,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:40,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272820667] [2021-12-17 13:54:40,360 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:40,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889674670] [2021-12-17 13:54:40,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889674670] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:40,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:40,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-17 13:54:40,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252361530] [2021-12-17 13:54:40,361 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:40,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 13:54:40,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 13:54:40,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-17 13:54:40,362 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 13:54:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:40,432 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-12-17 13:54:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 13:54:40,432 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2021-12-17 13:54:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:40,433 INFO L225 Difference]: With dead ends: 48 [2021-12-17 13:54:40,433 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 13:54:40,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-17 13:54:40,434 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:40,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 166 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 13:54:40,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 13:54:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-17 13:54:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 13:54:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-12-17 13:54:40,452 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2021-12-17 13:54:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:40,453 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-12-17 13:54:40,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 13:54:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-12-17 13:54:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 13:54:40,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:40,455 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:40,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:40,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:40,663 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2045303987, now seen corresponding path program 2 times [2021-12-17 13:54:40,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:40,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262592841] [2021-12-17 13:54:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:40,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:40,669 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:40,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838893128] [2021-12-17 13:54:40,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 13:54:40,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:40,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:40,674 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) [2021-12-17 13:54:40,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 13:54:40,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 13:54:40,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:40,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 13:54:40,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 13:54:40,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 13:54:40,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:40,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262592841] [2021-12-17 13:54:40,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:40,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838893128] [2021-12-17 13:54:40,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838893128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 13:54:40,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 13:54:40,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-17 13:54:40,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098265062] [2021-12-17 13:54:40,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:40,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 13:54:40,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:40,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 13:54:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-17 13:54:40,912 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 13:54:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:41,070 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2021-12-17 13:54:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 13:54:41,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2021-12-17 13:54:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:41,072 INFO L225 Difference]: With dead ends: 119 [2021-12-17 13:54:41,072 INFO L226 Difference]: Without dead ends: 114 [2021-12-17 13:54:41,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-17 13:54:41,074 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:41,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 116 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 13:54:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-17 13:54:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2021-12-17 13:54:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 13:54:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2021-12-17 13:54:41,092 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 40 [2021-12-17 13:54:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:41,092 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2021-12-17 13:54:41,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 13:54:41,092 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2021-12-17 13:54:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 13:54:41,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:41,098 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:41,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:41,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 13:54:41,311 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash -635357324, now seen corresponding path program 4 times [2021-12-17 13:54:41,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:41,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294308022] [2021-12-17 13:54:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:41,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:41,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:41,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437072104] [2021-12-17 13:54:41,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 13:54:41,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:41,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:41,340 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) [2021-12-17 13:54:41,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 13:54:41,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 13:54:41,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:41,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 13:54:41,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 13:54:41,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:41,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:41,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294308022] [2021-12-17 13:54:41,721 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:41,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437072104] [2021-12-17 13:54:41,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437072104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:41,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:41,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-17 13:54:41,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419843142] [2021-12-17 13:54:41,721 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:41,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 13:54:41,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 13:54:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-17 13:54:41,722 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 13:54:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:41,811 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-12-17 13:54:41,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 13:54:41,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2021-12-17 13:54:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:41,829 INFO L225 Difference]: With dead ends: 94 [2021-12-17 13:54:41,829 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 13:54:41,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-17 13:54:41,829 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:41,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 214 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 13:54:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 13:54:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-17 13:54:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 13:54:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2021-12-17 13:54:41,836 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 46 [2021-12-17 13:54:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:41,837 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2021-12-17 13:54:41,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 13:54:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2021-12-17 13:54:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 13:54:41,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:41,838 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:41,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:42,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 13:54:42,045 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:42,046 INFO L85 PathProgramCache]: Analyzing trace with hash 220350426, now seen corresponding path program 5 times [2021-12-17 13:54:42,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:42,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455023061] [2021-12-17 13:54:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:42,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:42,051 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:42,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471523815] [2021-12-17 13:54:42,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 13:54:42,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:42,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:42,052 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) [2021-12-17 13:54:42,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 13:54:42,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-17 13:54:42,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 13:54:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 13:54:42,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:42,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:42,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455023061] [2021-12-17 13:54:42,632 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:42,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471523815] [2021-12-17 13:54:42,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471523815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:42,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:42,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-17 13:54:42,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529955939] [2021-12-17 13:54:42,633 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:42,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 13:54:42,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 13:54:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-17 13:54:42,634 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 13:54:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:42,743 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-12-17 13:54:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 13:54:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2021-12-17 13:54:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:42,744 INFO L225 Difference]: With dead ends: 94 [2021-12-17 13:54:42,744 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 13:54:42,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-17 13:54:42,745 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:42,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 268 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 13:54:42,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 13:54:42,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-17 13:54:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 13:54:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-17 13:54:42,751 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 54 [2021-12-17 13:54:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:42,752 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-17 13:54:42,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 13:54:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-17 13:54:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 13:54:42,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:42,753 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:42,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:42,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 13:54:42,958 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:42,959 INFO L85 PathProgramCache]: Analyzing trace with hash 156734016, now seen corresponding path program 6 times [2021-12-17 13:54:42,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:42,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328734046] [2021-12-17 13:54:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:42,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:42,964 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:42,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538990841] [2021-12-17 13:54:42,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 13:54:42,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:42,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:42,965 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) [2021-12-17 13:54:42,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 13:54:43,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 13:54:43,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:43,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-17 13:54:43,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 13:54:43,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:43,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:43,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328734046] [2021-12-17 13:54:43,893 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:43,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538990841] [2021-12-17 13:54:43,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538990841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:43,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:43,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-17 13:54:43,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004824834] [2021-12-17 13:54:43,894 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:43,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 13:54:43,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:43,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 13:54:43,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-12-17 13:54:43,895 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 13:54:44,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:44,016 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2021-12-17 13:54:44,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 13:54:44,017 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 62 [2021-12-17 13:54:44,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:44,017 INFO L225 Difference]: With dead ends: 94 [2021-12-17 13:54:44,017 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 13:54:44,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-12-17 13:54:44,018 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:44,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 328 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 13:54:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 13:54:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-17 13:54:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 13:54:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-12-17 13:54:44,023 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 62 [2021-12-17 13:54:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:44,024 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-12-17 13:54:44,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 13:54:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-12-17 13:54:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 13:54:44,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:44,024 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:44,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:44,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 13:54:44,230 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash -605612378, now seen corresponding path program 7 times [2021-12-17 13:54:44,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:44,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347640057] [2021-12-17 13:54:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:44,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:44,239 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:44,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230880684] [2021-12-17 13:54:44,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 13:54:44,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:44,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:44,242 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) [2021-12-17 13:54:44,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 13:54:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:54:44,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 13:54:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-17 13:54:44,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:45,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:45,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347640057] [2021-12-17 13:54:45,025 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:45,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230880684] [2021-12-17 13:54:45,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230880684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:45,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:45,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-17 13:54:45,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920494391] [2021-12-17 13:54:45,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:45,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 13:54:45,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:45,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 13:54:45,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-17 13:54:45,026 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 13:54:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:45,156 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2021-12-17 13:54:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 13:54:45,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 70 [2021-12-17 13:54:45,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:45,157 INFO L225 Difference]: With dead ends: 94 [2021-12-17 13:54:45,158 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 13:54:45,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-17 13:54:45,158 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:45,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 394 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 13:54:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 13:54:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-17 13:54:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 13:54:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2021-12-17 13:54:45,163 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 70 [2021-12-17 13:54:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:45,163 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2021-12-17 13:54:45,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 13:54:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2021-12-17 13:54:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 13:54:45,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:45,164 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:45,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:45,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 13:54:45,369 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:45,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash 200725772, now seen corresponding path program 8 times [2021-12-17 13:54:45,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:45,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738104824] [2021-12-17 13:54:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:45,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:45,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:45,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887816460] [2021-12-17 13:54:45,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 13:54:45,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:45,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:45,383 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) [2021-12-17 13:54:45,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 13:54:45,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 13:54:45,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 13:54:45,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-17 13:54:46,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:46,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:46,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738104824] [2021-12-17 13:54:46,121 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:46,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887816460] [2021-12-17 13:54:46,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887816460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:46,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:46,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-17 13:54:46,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895104818] [2021-12-17 13:54:46,121 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:46,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 13:54:46,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:46,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 13:54:46,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-12-17 13:54:46,122 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 13:54:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:46,286 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-12-17 13:54:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 13:54:46,287 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 78 [2021-12-17 13:54:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:46,287 INFO L225 Difference]: With dead ends: 94 [2021-12-17 13:54:46,287 INFO L226 Difference]: Without dead ends: 89 [2021-12-17 13:54:46,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-17 13:54:46,288 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:46,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 466 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 13:54:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-17 13:54:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-17 13:54:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 13:54:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-12-17 13:54:46,292 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 78 [2021-12-17 13:54:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:46,296 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-12-17 13:54:46,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-17 13:54:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-12-17 13:54:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 13:54:46,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:46,297 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:46,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:46,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 13:54:46,502 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1699951246, now seen corresponding path program 9 times [2021-12-17 13:54:46,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:46,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747749179] [2021-12-17 13:54:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:46,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:46,508 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:46,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504236516] [2021-12-17 13:54:46,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 13:54:46,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:46,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:46,515 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) [2021-12-17 13:54:46,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 13:54:46,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 13:54:46,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:46,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 13:54:46,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 13:54:47,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:47,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:47,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747749179] [2021-12-17 13:54:47,244 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:47,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504236516] [2021-12-17 13:54:47,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504236516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:47,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:47,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-17 13:54:47,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241303649] [2021-12-17 13:54:47,244 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:47,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 13:54:47,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:47,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 13:54:47,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-17 13:54:47,245 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 13:54:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:47,450 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-12-17 13:54:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 13:54:47,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 86 [2021-12-17 13:54:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:47,451 INFO L225 Difference]: With dead ends: 96 [2021-12-17 13:54:47,451 INFO L226 Difference]: Without dead ends: 91 [2021-12-17 13:54:47,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-17 13:54:47,452 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:47,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 544 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 13:54:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-17 13:54:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-17 13:54:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 13:54:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2021-12-17 13:54:47,456 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2021-12-17 13:54:47,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:47,456 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2021-12-17 13:54:47,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 13:54:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2021-12-17 13:54:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-17 13:54:47,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:47,457 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:47,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:47,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:47,662 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:47,663 INFO L85 PathProgramCache]: Analyzing trace with hash -780287977, now seen corresponding path program 3 times [2021-12-17 13:54:47,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:47,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24570504] [2021-12-17 13:54:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:47,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:47,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:47,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226616138] [2021-12-17 13:54:47,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 13:54:47,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:47,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:47,671 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:54:47,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 13:54:48,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-17 13:54:48,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:48,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 13:54:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 13:54:48,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 13:54:48,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:48,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24570504] [2021-12-17 13:54:48,684 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:48,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226616138] [2021-12-17 13:54:48,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226616138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 13:54:48,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 13:54:48,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-17 13:54:48,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469447489] [2021-12-17 13:54:48,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:48,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 13:54:48,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:48,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 13:54:48,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2021-12-17 13:54:48,687 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 13:54:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:49,076 INFO L93 Difference]: Finished difference Result 245 states and 257 transitions. [2021-12-17 13:54:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-17 13:54:49,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2021-12-17 13:54:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:49,078 INFO L225 Difference]: With dead ends: 245 [2021-12-17 13:54:49,078 INFO L226 Difference]: Without dead ends: 240 [2021-12-17 13:54:49,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 13:54:49,079 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 240 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:49,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 239 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 13:54:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-17 13:54:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 185. [2021-12-17 13:54:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 139 states have internal predecessors, (152), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:54:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 197 transitions. [2021-12-17 13:54:49,092 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 197 transitions. Word has length 88 [2021-12-17 13:54:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:49,092 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 197 transitions. [2021-12-17 13:54:49,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 13:54:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 197 transitions. [2021-12-17 13:54:49,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-17 13:54:49,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:49,094 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:49,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:49,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 13:54:49,306 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash 53411800, now seen corresponding path program 10 times [2021-12-17 13:54:49,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:49,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710713449] [2021-12-17 13:54:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:49,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:49,320 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:49,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326631721] [2021-12-17 13:54:49,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 13:54:49,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:49,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:49,323 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:54:49,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 13:54:50,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 13:54:50,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:50,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 13:54:50,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 22 proven. 220 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-17 13:54:50,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:50,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:50,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710713449] [2021-12-17 13:54:50,893 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:50,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326631721] [2021-12-17 13:54:50,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326631721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:50,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:50,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-17 13:54:50,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648007856] [2021-12-17 13:54:50,893 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:50,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 13:54:50,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 13:54:50,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-17 13:54:50,894 INFO L87 Difference]: Start difference. First operand 185 states and 197 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 13:54:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:51,117 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2021-12-17 13:54:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 13:54:51,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 94 [2021-12-17 13:54:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:51,120 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:54:51,120 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:54:51,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-17 13:54:51,121 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 2 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:51,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 628 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 13:54:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:54:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:54:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0863309352517985) internal successors, (151), 139 states have internal predecessors, (151), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:54:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 196 transitions. [2021-12-17 13:54:51,127 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 196 transitions. Word has length 94 [2021-12-17 13:54:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:51,128 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 196 transitions. [2021-12-17 13:54:51,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 13:54:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 196 transitions. [2021-12-17 13:54:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 13:54:51,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:51,129 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:51,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-17 13:54:51,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 13:54:51,335 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:51,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:51,335 INFO L85 PathProgramCache]: Analyzing trace with hash 983788606, now seen corresponding path program 11 times [2021-12-17 13:54:51,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:51,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591053779] [2021-12-17 13:54:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:51,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:51,341 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:51,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438044435] [2021-12-17 13:54:51,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 13:54:51,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:51,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:51,347 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:54:51,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 13:54:51,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-17 13:54:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-17 13:54:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 24 proven. 264 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-17 13:54:52,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:52,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:52,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591053779] [2021-12-17 13:54:52,434 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:52,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438044435] [2021-12-17 13:54:52,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438044435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:52,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:52,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-17 13:54:52,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188484814] [2021-12-17 13:54:52,435 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:52,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 13:54:52,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 13:54:52,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-12-17 13:54:52,436 INFO L87 Difference]: Start difference. First operand 185 states and 196 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 13:54:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:52,690 INFO L93 Difference]: Finished difference Result 190 states and 200 transitions. [2021-12-17 13:54:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 13:54:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 102 [2021-12-17 13:54:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:52,699 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:54:52,699 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:54:52,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-12-17 13:54:52,700 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:52,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 718 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 13:54:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:54:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:54:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.079136690647482) internal successors, (150), 139 states have internal predecessors, (150), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:54:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 195 transitions. [2021-12-17 13:54:52,708 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 195 transitions. Word has length 102 [2021-12-17 13:54:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:52,709 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 195 transitions. [2021-12-17 13:54:52,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 13:54:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 195 transitions. [2021-12-17 13:54:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 13:54:52,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:52,710 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:52,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:52,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 13:54:52,917 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:52,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:52,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1339026780, now seen corresponding path program 12 times [2021-12-17 13:54:52,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:52,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360029074] [2021-12-17 13:54:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:52,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:52,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:52,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360598435] [2021-12-17 13:54:52,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 13:54:52,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:52,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:52,926 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:54:52,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 13:54:53,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-17 13:54:53,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:53,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-17 13:54:53,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 26 proven. 312 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-17 13:54:53,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:54,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:54,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360029074] [2021-12-17 13:54:54,415 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:54,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360598435] [2021-12-17 13:54:54,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360598435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:54,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:54,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-17 13:54:54,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044757936] [2021-12-17 13:54:54,416 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:54,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 13:54:54,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 13:54:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-12-17 13:54:54,417 INFO L87 Difference]: Start difference. First operand 185 states and 195 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 13:54:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:54,706 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2021-12-17 13:54:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 13:54:54,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 110 [2021-12-17 13:54:54,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:54,707 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:54:54,707 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:54:54,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-12-17 13:54:54,708 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:54,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 814 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 13:54:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:54:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:54:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 139 states have internal predecessors, (149), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:54:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 194 transitions. [2021-12-17 13:54:54,714 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 194 transitions. Word has length 110 [2021-12-17 13:54:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:54,714 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 194 transitions. [2021-12-17 13:54:54,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-17 13:54:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 194 transitions. [2021-12-17 13:54:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-17 13:54:54,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:54,723 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:54,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:54,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:54,928 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1291514634, now seen corresponding path program 13 times [2021-12-17 13:54:54,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:54,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956683695] [2021-12-17 13:54:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:54,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:54,935 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:54,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131146690] [2021-12-17 13:54:54,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 13:54:54,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:54,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:54,936 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:54:54,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-17 13:54:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:54:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-17 13:54:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 28 proven. 364 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-17 13:54:55,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:56,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956683695] [2021-12-17 13:54:56,001 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131146690] [2021-12-17 13:54:56,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131146690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:56,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:56,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-12-17 13:54:56,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782367091] [2021-12-17 13:54:56,002 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:56,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 13:54:56,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:56,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 13:54:56,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-12-17 13:54:56,003 INFO L87 Difference]: Start difference. First operand 185 states and 194 transitions. Second operand has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 13:54:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:56,303 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2021-12-17 13:54:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 13:54:56,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 118 [2021-12-17 13:54:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:56,311 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:54:56,312 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:54:56,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-12-17 13:54:56,312 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 2 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:56,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 916 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 13:54:56,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:54:56,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:54:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.064748201438849) internal successors, (148), 139 states have internal predecessors, (148), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:54:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 193 transitions. [2021-12-17 13:54:56,320 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 193 transitions. Word has length 118 [2021-12-17 13:54:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:56,320 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 193 transitions. [2021-12-17 13:54:56,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 13:54:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 193 transitions. [2021-12-17 13:54:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 13:54:56,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:56,321 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:56,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-17 13:54:56,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:56,531 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1948913008, now seen corresponding path program 14 times [2021-12-17 13:54:56,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:56,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780035050] [2021-12-17 13:54:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:56,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:56,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:56,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877537339] [2021-12-17 13:54:56,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 13:54:56,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:56,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:56,537 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:54:56,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-17 13:54:57,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 13:54:57,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:57,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-17 13:54:57,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:54:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 30 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-12-17 13:54:57,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:54:57,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:54:57,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780035050] [2021-12-17 13:54:57,708 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:54:57,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877537339] [2021-12-17 13:54:57,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877537339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:54:57,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:54:57,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-17 13:54:57,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149911559] [2021-12-17 13:54:57,708 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:54:57,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 13:54:57,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:54:57,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 13:54:57,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-12-17 13:54:57,709 INFO L87 Difference]: Start difference. First operand 185 states and 193 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 13:54:58,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:54:58,025 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2021-12-17 13:54:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 13:54:58,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 126 [2021-12-17 13:54:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:54:58,026 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:54:58,026 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:54:58,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-12-17 13:54:58,027 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 13:54:58,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1024 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 13:54:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:54:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:54:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0575539568345325) internal successors, (147), 139 states have internal predecessors, (147), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:54:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 192 transitions. [2021-12-17 13:54:58,033 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 192 transitions. Word has length 126 [2021-12-17 13:54:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:54:58,033 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 192 transitions. [2021-12-17 13:54:58,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 13:54:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 192 transitions. [2021-12-17 13:54:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-17 13:54:58,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:54:58,034 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2021-12-17 13:54:58,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-17 13:54:58,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-17 13:54:58,239 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:54:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:54:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash 48456150, now seen corresponding path program 15 times [2021-12-17 13:54:58,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:54:58,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635118021] [2021-12-17 13:54:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:54:58,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:54:58,244 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:54:58,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014564764] [2021-12-17 13:54:58,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 13:54:58,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:54:58,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:54:58,246 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:54:58,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-17 13:54:59,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-17 13:54:59,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:54:59,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-17 13:54:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:55:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 32 proven. 480 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-12-17 13:55:00,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:55:01,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:55:01,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635118021] [2021-12-17 13:55:01,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:55:01,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014564764] [2021-12-17 13:55:01,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014564764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:55:01,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:55:01,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-17 13:55:01,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930897119] [2021-12-17 13:55:01,566 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:55:01,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 13:55:01,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:55:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 13:55:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 13:55:01,567 INFO L87 Difference]: Start difference. First operand 185 states and 192 transitions. Second operand has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 13:55:01,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:55:01,989 INFO L93 Difference]: Finished difference Result 190 states and 196 transitions. [2021-12-17 13:55:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 13:55:01,991 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 134 [2021-12-17 13:55:01,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:55:01,992 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:55:01,992 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:55:01,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 13:55:01,994 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 13:55:01,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1138 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 13:55:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:55:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:55:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 139 states have internal predecessors, (146), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:55:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 191 transitions. [2021-12-17 13:55:02,000 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 191 transitions. Word has length 134 [2021-12-17 13:55:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:55:02,001 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 191 transitions. [2021-12-17 13:55:02,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 17 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 13:55:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 191 transitions. [2021-12-17 13:55:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 13:55:02,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:55:02,002 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2021-12-17 13:55:02,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-17 13:55:02,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 13:55:02,209 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:55:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:55:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1347219516, now seen corresponding path program 16 times [2021-12-17 13:55:02,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:55:02,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491029978] [2021-12-17 13:55:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:55:02,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:55:02,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:55:02,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199872655] [2021-12-17 13:55:02,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 13:55:02,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:55:02,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:55:02,216 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:55:02,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-17 13:55:03,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 13:55:03,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:55:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-17 13:55:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:55:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 34 proven. 544 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-12-17 13:55:03,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:55:03,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:55:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491029978] [2021-12-17 13:55:03,730 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:55:03,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199872655] [2021-12-17 13:55:03,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199872655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:55:03,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:55:03,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-12-17 13:55:03,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863606541] [2021-12-17 13:55:03,730 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:55:03,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-17 13:55:03,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:55:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-17 13:55:03,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-12-17 13:55:03,731 INFO L87 Difference]: Start difference. First operand 185 states and 191 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 13:55:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:55:04,128 INFO L93 Difference]: Finished difference Result 190 states and 195 transitions. [2021-12-17 13:55:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 13:55:04,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 142 [2021-12-17 13:55:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:55:04,129 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:55:04,130 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:55:04,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-12-17 13:55:04,130 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 13:55:04,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1258 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 13:55:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:55:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:55:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0431654676258992) internal successors, (145), 139 states have internal predecessors, (145), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:55:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 190 transitions. [2021-12-17 13:55:04,137 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 190 transitions. Word has length 142 [2021-12-17 13:55:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:55:04,137 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 190 transitions. [2021-12-17 13:55:04,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 18 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 13:55:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 190 transitions. [2021-12-17 13:55:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-17 13:55:04,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:55:04,138 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2021-12-17 13:55:04,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-17 13:55:04,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:55:04,344 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:55:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:55:04,345 INFO L85 PathProgramCache]: Analyzing trace with hash 764197026, now seen corresponding path program 17 times [2021-12-17 13:55:04,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:55:04,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935503175] [2021-12-17 13:55:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:55:04,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:55:04,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:55:04,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802316312] [2021-12-17 13:55:04,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 13:55:04,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:55:04,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:55:04,352 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:55:04,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-17 13:55:04,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-17 13:55:04,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:55:04,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-17 13:55:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:55:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 36 proven. 612 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-12-17 13:55:05,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:55:06,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:55:06,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935503175] [2021-12-17 13:55:06,763 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:55:06,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802316312] [2021-12-17 13:55:06,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802316312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:55:06,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:55:06,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-17 13:55:06,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398634614] [2021-12-17 13:55:06,764 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:55:06,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 13:55:06,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:55:06,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 13:55:06,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 13:55:06,765 INFO L87 Difference]: Start difference. First operand 185 states and 190 transitions. Second operand has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 13:55:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:55:07,285 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2021-12-17 13:55:07,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 13:55:07,285 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 150 [2021-12-17 13:55:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:55:07,286 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:55:07,287 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:55:07,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 13:55:07,288 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 13:55:07,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1384 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 13:55:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:55:07,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:55:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:55:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2021-12-17 13:55:07,296 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 150 [2021-12-17 13:55:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:55:07,311 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2021-12-17 13:55:07,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 19 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-17 13:55:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2021-12-17 13:55:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-17 13:55:07,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:55:07,315 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2021-12-17 13:55:07,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-17 13:55:07,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:55:07,521 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:55:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:55:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash -439829752, now seen corresponding path program 18 times [2021-12-17 13:55:07,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:55:07,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334668655] [2021-12-17 13:55:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:55:07,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:55:07,526 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:55:07,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845093141] [2021-12-17 13:55:07,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 13:55:07,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:55:07,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:55:07,528 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:55:07,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-17 13:55:08,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-17 13:55:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:55:08,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-17 13:55:08,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:55:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 138 proven. 686 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2021-12-17 13:55:09,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:55:37,329 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= (+ (* 2 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 1) (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))) (<= |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~c~0#1|) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* (- 2) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (- 4)) 0))) is different from false [2021-12-17 13:55:37,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:55:37,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334668655] [2021-12-17 13:55:37,331 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:55:37,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845093141] [2021-12-17 13:55:37,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845093141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:55:37,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:55:37,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-17 13:55:37,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410846315] [2021-12-17 13:55:37,332 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:55:37,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 13:55:37,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:55:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 13:55:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=950, Unknown=7, NotChecked=62, Total=1122 [2021-12-17 13:55:37,333 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 13:55:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:55:37,958 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2021-12-17 13:55:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 13:55:37,958 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 158 [2021-12-17 13:55:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:55:37,959 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:55:37,959 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:55:37,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=124, Invalid=1133, Unknown=7, NotChecked=68, Total=1332 [2021-12-17 13:55:37,960 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 8 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 13:55:37,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1599 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 13:55:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:55:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:55:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:55:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2021-12-17 13:55:37,973 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 158 [2021-12-17 13:55:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:55:37,973 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2021-12-17 13:55:37,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 13:55:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2021-12-17 13:55:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 13:55:37,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:55:37,975 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2021-12-17 13:55:37,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-17 13:55:38,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-17 13:55:38,182 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:55:38,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:55:38,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1042741102, now seen corresponding path program 19 times [2021-12-17 13:55:38,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:55:38,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066468127] [2021-12-17 13:55:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:55:38,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:55:38,191 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:55:38,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289767077] [2021-12-17 13:55:38,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 13:55:38,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:55:38,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:55:38,193 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:55:38,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-17 13:55:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 13:55:38,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-17 13:55:38,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:55:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 40 proven. 760 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-12-17 13:55:39,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:55:41,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:55:41,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066468127] [2021-12-17 13:55:41,317 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:55:41,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289767077] [2021-12-17 13:55:41,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289767077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:55:41,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:55:41,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-17 13:55:41,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618069399] [2021-12-17 13:55:41,317 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:55:41,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 13:55:41,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:55:41,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 13:55:41,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1613, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 13:55:41,318 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 13:55:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:55:41,900 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-12-17 13:55:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-17 13:55:41,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 166 [2021-12-17 13:55:41,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:55:41,901 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:55:41,901 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:55:41,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=467, Invalid=1789, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 13:55:41,902 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 2 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 13:55:41,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1654 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 13:55:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:55:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:55:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:55:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2021-12-17 13:55:41,913 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 166 [2021-12-17 13:55:41,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:55:41,914 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2021-12-17 13:55:41,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 21 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 13:55:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2021-12-17 13:55:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-17 13:55:41,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:55:41,915 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1] [2021-12-17 13:55:41,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-17 13:55:42,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 13:55:42,121 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:55:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:55:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1976397268, now seen corresponding path program 20 times [2021-12-17 13:55:42,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:55:42,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836035005] [2021-12-17 13:55:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:55:42,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:55:42,127 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:55:42,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410347805] [2021-12-17 13:55:42,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 13:55:42,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:55:42,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:55:42,148 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:55:42,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-17 13:55:42,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 13:55:42,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:55:42,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-17 13:55:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:55:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 42 proven. 840 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-12-17 13:55:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:55:43,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 13:55:43,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836035005] [2021-12-17 13:55:43,518 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 13:55:43,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410347805] [2021-12-17 13:55:43,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410347805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 13:55:43,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 13:55:43,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-12-17 13:55:43,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723322221] [2021-12-17 13:55:43,518 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 13:55:43,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 13:55:43,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 13:55:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 13:55:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-12-17 13:55:43,519 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 26 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 13:55:44,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 13:55:44,119 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2021-12-17 13:55:44,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 13:55:44,120 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 174 [2021-12-17 13:55:44,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 13:55:44,121 INFO L225 Difference]: With dead ends: 190 [2021-12-17 13:55:44,121 INFO L226 Difference]: Without dead ends: 185 [2021-12-17 13:55:44,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-12-17 13:55:44,121 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 13:55:44,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1798 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 13:55:44,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-17 13:55:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-12-17 13:55:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 13:55:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-12-17 13:55:44,129 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 174 [2021-12-17 13:55:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 13:55:44,129 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-12-17 13:55:44,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 22 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-17 13:55:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-12-17 13:55:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-17 13:55:44,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 13:55:44,131 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1] [2021-12-17 13:55:44,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-17 13:55:44,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-17 13:55:44,331 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 13:55:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 13:55:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1172446778, now seen corresponding path program 21 times [2021-12-17 13:55:44,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 13:55:44,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108126372] [2021-12-17 13:55:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 13:55:44,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 13:55:44,338 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 13:55:44,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739220603] [2021-12-17 13:55:44,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 13:55:44,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 13:55:44,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 13:55:44,347 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 13:55:44,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-17 13:55:45,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-17 13:55:45,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 13:55:45,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-17 13:55:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 13:55:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 162 proven. 926 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-12-17 13:55:46,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 13:55:50,820 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* (- 13) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse3 (* (- 6) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse2 (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ (* 2 |c_ULTIMATE.start_main_~y~0#1|) .cse0 1) (+ |c_ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|) (<= |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~c~0#1|) (not (= (mod (+ .cse1 .cse2 .cse3) (- 4)) 0)) (< (div (+ .cse1 .cse3 .cse2 (- 4)) (- 4)) (+ |c_ULTIMATE.start_main_~x~0#1| (* 3 .cse0) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 1)))) is different from false [2021-12-17 13:55:54,864 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ (* 2 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 1) (+ |c_ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|) (<= |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~c~0#1|) (not (= (mod (+ (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* (- 2) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (- 4)) 0))) is different from false [2021-12-17 13:56:02,950 WARN L838 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 1)) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0))) (- 4)) 0)) (= (+ (* 4 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 4) (+ (* 2 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2021-12-17 13:56:58,676 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 4))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0)) (= (+ (* 10 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 25) (+ (* 5 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 4)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|)) is different from false [2021-12-17 13:57:08,745 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 5))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 5)) (= (+ (* 12 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 36) (+ (* 6 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|)) is different from false [2021-12-17 13:58:20,861 WARN L838 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 8)) (= (+ (* 18 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 81) (+ (* 9 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 8))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0))) (- 4)) 0)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 9) |c_ULTIMATE.start_main_~k~0#1|)) is different from false [2021-12-17 13:59:25,685 WARN L838 $PredicateComparison]: unable to prove that (or (= (+ (* 22 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 121) (+ (* 11 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 11) |c_ULTIMATE.start_main_~k~0#1|) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 10)) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 10))) (+ (* (- 1) .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0))) is different from false [2021-12-17 13:59:53,950 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 12))) (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0))) (- 4)) 0)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 12)) (= (+ (* 26 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 169) (+ (* 13 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 13) |c_ULTIMATE.start_main_~k~0#1|)) is different from false [2021-12-17 14:00:32,724 WARN L838 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 14)) (= (+ (* 30 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 225) (+ (* 15 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 14))) (+ (* (- 2) .cse0 .cse0 .cse0) (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0))) (- 4)) 0)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 15) |c_ULTIMATE.start_main_~k~0#1|)) is different from false [2021-12-17 14:02:01,940 WARN L838 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 17)) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 17))) (+ (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0))) (- 4)) 0)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 18) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* 36 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 324) (+ (* 18 |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) is different from false [2021-12-17 14:02:59,919 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 20)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 21) |ULTIMATE.start_main_~k~0#1|) (= (+ (* 42 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 441) (+ (* 21 |ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 20))) (+ (* (- 1) .cse0 .cse0) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 2) .cse0 .cse0 .cse0))) (- 4)) 0))) is different from false [2021-12-17 14:03:02,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:03:02,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108126372] [2021-12-17 14:03:02,071 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:03:02,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739220603] [2021-12-17 14:03:02,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739220603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:03:02,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:03:02,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-12-17 14:03:02,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720938698] [2021-12-17 14:03:02,071 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:03:02,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 14:03:02,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:03:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 14:03:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1717, Unknown=23, NotChecked=1078, Total=3192 [2021-12-17 14:03:02,073 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 28 states have internal predecessors, (77), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 14:03:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:03:03,003 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2021-12-17 14:03:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 14:03:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 28 states have internal predecessors, (77), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 182 [2021-12-17 14:03:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:03:03,005 INFO L225 Difference]: With dead ends: 192 [2021-12-17 14:03:03,005 INFO L226 Difference]: Without dead ends: 187 [2021-12-17 14:03:03,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 298 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 268.3s TimeCoverageRelationStatistics Valid=395, Invalid=1978, Unknown=23, NotChecked=1144, Total=3540 [2021-12-17 14:03:03,006 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 8 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:03:03,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2043 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 14:03:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-17 14:03:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-12-17 14:03:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 24 states have call successors, (24), 23 states have call predecessors, (24), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 14:03:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2021-12-17 14:03:03,012 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2021-12-17 14:03:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:03:03,012 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2021-12-17 14:03:03,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.566666666666667) internal successors, (77), 28 states have internal predecessors, (77), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-17 14:03:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2021-12-17 14:03:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 14:03:03,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:03:03,013 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-12-17 14:03:03,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-17 14:03:03,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-17 14:03:03,220 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:03:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:03:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2069758241, now seen corresponding path program 4 times [2021-12-17 14:03:03,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:03:03,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38098783] [2021-12-17 14:03:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:03:03,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:03:03,230 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:03:03,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753686690] [2021-12-17 14:03:03,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 14:03:03,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:03,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:03:03,231 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:03:03,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-17 14:03:04,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 14:03:04,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:03:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-17 14:03:04,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:03:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 14:03:04,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:03:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-12-17 14:03:05,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:03:05,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38098783] [2021-12-17 14:03:05,675 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:03:05,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753686690] [2021-12-17 14:03:05,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753686690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 14:03:05,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 14:03:05,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2021-12-17 14:03:05,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708222690] [2021-12-17 14:03:05,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 14:03:05,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-17 14:03:05,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:03:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-17 14:03:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2021-12-17 14:03:05,678 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-17 14:03:06,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:03:06,852 INFO L93 Difference]: Finished difference Result 497 states and 521 transitions. [2021-12-17 14:03:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-17 14:03:06,853 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) Word has length 184 [2021-12-17 14:03:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:03:06,854 INFO L225 Difference]: With dead ends: 497 [2021-12-17 14:03:06,854 INFO L226 Difference]: Without dead ends: 492 [2021-12-17 14:03:06,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2021-12-17 14:03:06,856 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 630 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 14:03:06,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 395 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 14:03:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-12-17 14:03:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 377. [2021-12-17 14:03:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.088339222614841) internal successors, (308), 283 states have internal predecessors, (308), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:03:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 401 transitions. [2021-12-17 14:03:06,872 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 401 transitions. Word has length 184 [2021-12-17 14:03:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:03:06,872 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 401 transitions. [2021-12-17 14:03:06,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-17 14:03:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 401 transitions. [2021-12-17 14:03:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 14:03:06,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:03:06,874 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1] [2021-12-17 14:03:06,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-17 14:03:07,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-17 14:03:07,080 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:03:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:03:07,081 INFO L85 PathProgramCache]: Analyzing trace with hash -510981984, now seen corresponding path program 22 times [2021-12-17 14:03:07,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:03:07,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185926110] [2021-12-17 14:03:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:03:07,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:03:07,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:03:07,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289524843] [2021-12-17 14:03:07,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 14:03:07,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:07,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:03:07,087 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:03:07,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-17 14:03:07,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 14:03:07,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:03:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-17 14:03:08,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:03:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 46 proven. 1012 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-12-17 14:03:08,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:03:08,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:03:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185926110] [2021-12-17 14:03:08,924 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:03:08,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289524843] [2021-12-17 14:03:08,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289524843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:03:08,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:03:08,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-17 14:03:08,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558953861] [2021-12-17 14:03:08,925 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:03:08,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 14:03:08,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:03:08,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 14:03:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-12-17 14:03:08,926 INFO L87 Difference]: Start difference. First operand 377 states and 401 transitions. Second operand has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 14:03:09,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:03:09,655 INFO L93 Difference]: Finished difference Result 382 states and 405 transitions. [2021-12-17 14:03:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 14:03:09,684 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 190 [2021-12-17 14:03:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:03:09,685 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:03:09,685 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:03:09,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 14:03:09,686 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 2 mSDsluCounter, 2002 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:03:09,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2104 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 14:03:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:03:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:03:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0848056537102473) internal successors, (307), 283 states have internal predecessors, (307), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:03:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 400 transitions. [2021-12-17 14:03:09,706 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 400 transitions. Word has length 190 [2021-12-17 14:03:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:03:09,706 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 400 transitions. [2021-12-17 14:03:09,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 24 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-17 14:03:09,707 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 400 transitions. [2021-12-17 14:03:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-17 14:03:09,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:03:09,707 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1] [2021-12-17 14:03:09,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-17 14:03:09,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:09,914 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:03:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:03:09,915 INFO L85 PathProgramCache]: Analyzing trace with hash -168940282, now seen corresponding path program 23 times [2021-12-17 14:03:09,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:03:09,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596241359] [2021-12-17 14:03:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:03:09,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:03:09,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:03:09,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899105093] [2021-12-17 14:03:09,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 14:03:09,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:09,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:03:09,921 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:03:09,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-17 14:03:12,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-17 14:03:12,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:03:12,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-17 14:03:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:03:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 48 proven. 1104 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-12-17 14:03:12,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:03:13,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:03:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596241359] [2021-12-17 14:03:13,215 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:03:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899105093] [2021-12-17 14:03:13,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899105093] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:03:13,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:03:13,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-12-17 14:03:13,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491452865] [2021-12-17 14:03:13,215 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:03:13,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 14:03:13,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:03:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 14:03:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-12-17 14:03:13,216 INFO L87 Difference]: Start difference. First operand 377 states and 400 transitions. Second operand has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 28 states have internal predecessors, (80), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 14:03:14,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:03:14,023 INFO L93 Difference]: Finished difference Result 382 states and 404 transitions. [2021-12-17 14:03:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 14:03:14,023 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 28 states have internal predecessors, (80), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 198 [2021-12-17 14:03:14,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:03:14,025 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:03:14,025 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:03:14,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 14:03:14,025 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:03:14,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2266 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 14:03:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:03:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:03:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0812720848056536) internal successors, (306), 283 states have internal predecessors, (306), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:03:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 399 transitions. [2021-12-17 14:03:14,035 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 399 transitions. Word has length 198 [2021-12-17 14:03:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:03:14,035 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 399 transitions. [2021-12-17 14:03:14,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 28 states have internal predecessors, (80), 25 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 14:03:14,035 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 399 transitions. [2021-12-17 14:03:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-17 14:03:14,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:03:14,036 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1] [2021-12-17 14:03:14,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-17 14:03:14,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-17 14:03:14,244 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:03:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:03:14,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1439593620, now seen corresponding path program 24 times [2021-12-17 14:03:14,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:03:14,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650844364] [2021-12-17 14:03:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:03:14,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:03:14,249 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:03:14,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259980020] [2021-12-17 14:03:14,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 14:03:14,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:14,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:03:14,251 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:03:14,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-17 14:03:15,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-17 14:03:15,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:03:15,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-17 14:03:15,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:03:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 50 proven. 1200 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2021-12-17 14:03:16,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:03:16,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:03:16,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650844364] [2021-12-17 14:03:16,662 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:03:16,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259980020] [2021-12-17 14:03:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259980020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:03:16,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:03:16,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-12-17 14:03:16,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695689720] [2021-12-17 14:03:16,662 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:03:16,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 14:03:16,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:03:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 14:03:16,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 14:03:16,664 INFO L87 Difference]: Start difference. First operand 377 states and 399 transitions. Second operand has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 14:03:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:03:17,428 INFO L93 Difference]: Finished difference Result 382 states and 403 transitions. [2021-12-17 14:03:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 14:03:17,431 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 206 [2021-12-17 14:03:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:03:17,433 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:03:17,433 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:03:17,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 14:03:17,434 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 2 mSDsluCounter, 2324 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2434 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 14:03:17,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2434 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 14:03:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:03:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:03:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0777385159010602) internal successors, (305), 283 states have internal predecessors, (305), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:03:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 398 transitions. [2021-12-17 14:03:17,443 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 398 transitions. Word has length 206 [2021-12-17 14:03:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:03:17,443 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 398 transitions. [2021-12-17 14:03:17,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 26 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-17 14:03:17,443 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 398 transitions. [2021-12-17 14:03:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-17 14:03:17,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:03:17,444 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1] [2021-12-17 14:03:17,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-17 14:03:17,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:17,653 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:03:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:03:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1619319854, now seen corresponding path program 25 times [2021-12-17 14:03:17,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:03:17,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330890662] [2021-12-17 14:03:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:03:17,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:03:17,659 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:03:17,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101917260] [2021-12-17 14:03:17,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 14:03:17,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:17,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:03:17,660 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:03:17,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-17 14:03:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:03:18,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-17 14:03:18,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:03:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 52 proven. 1300 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2021-12-17 14:03:19,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:03:19,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:03:19,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330890662] [2021-12-17 14:03:19,298 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:03:19,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101917260] [2021-12-17 14:03:19,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101917260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:03:19,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:03:19,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-12-17 14:03:19,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885712811] [2021-12-17 14:03:19,300 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:03:19,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-17 14:03:19,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:03:19,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-17 14:03:19,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 14:03:19,302 INFO L87 Difference]: Start difference. First operand 377 states and 398 transitions. Second operand has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 14:03:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:03:20,217 INFO L93 Difference]: Finished difference Result 382 states and 402 transitions. [2021-12-17 14:03:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 14:03:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 214 [2021-12-17 14:03:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:03:20,223 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:03:20,223 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:03:20,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 14:03:20,224 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 2 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2608 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 14:03:20,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2608 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 14:03:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:03:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:03:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0742049469964665) internal successors, (304), 283 states have internal predecessors, (304), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:03:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 397 transitions. [2021-12-17 14:03:20,233 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 397 transitions. Word has length 214 [2021-12-17 14:03:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:03:20,233 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 397 transitions. [2021-12-17 14:03:20,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 states have internal predecessors, (86), 27 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-17 14:03:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 397 transitions. [2021-12-17 14:03:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-17 14:03:20,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:03:20,235 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1] [2021-12-17 14:03:20,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-17 14:03:20,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:20,441 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:03:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:03:20,441 INFO L85 PathProgramCache]: Analyzing trace with hash -252643784, now seen corresponding path program 26 times [2021-12-17 14:03:20,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:03:20,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843704773] [2021-12-17 14:03:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:03:20,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:03:20,447 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:03:20,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552518358] [2021-12-17 14:03:20,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 14:03:20,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:03:20,448 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:03:20,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-17 14:03:21,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 14:03:21,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:03:21,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-17 14:03:21,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:03:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 54 proven. 1404 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2021-12-17 14:03:21,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:03:22,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:03:22,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843704773] [2021-12-17 14:03:22,152 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:03:22,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552518358] [2021-12-17 14:03:22,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552518358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:03:22,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:03:22,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-17 14:03:22,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709336852] [2021-12-17 14:03:22,153 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:03:22,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-17 14:03:22,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:03:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-17 14:03:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 14:03:22,154 INFO L87 Difference]: Start difference. First operand 377 states and 397 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 14:03:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:03:23,006 INFO L93 Difference]: Finished difference Result 382 states and 401 transitions. [2021-12-17 14:03:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 14:03:23,006 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 222 [2021-12-17 14:03:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:03:23,008 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:03:23,008 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:03:23,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 14:03:23,009 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 2670 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 14:03:23,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2788 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 14:03:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:03:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:03:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0706713780918728) internal successors, (303), 283 states have internal predecessors, (303), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:03:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 396 transitions. [2021-12-17 14:03:23,024 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 396 transitions. Word has length 222 [2021-12-17 14:03:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:03:23,024 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 396 transitions. [2021-12-17 14:03:23,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 28 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-17 14:03:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 396 transitions. [2021-12-17 14:03:23,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-17 14:03:23,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:03:23,026 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1] [2021-12-17 14:03:23,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-17 14:03:23,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-17 14:03:23,232 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:03:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:03:23,232 INFO L85 PathProgramCache]: Analyzing trace with hash 867762846, now seen corresponding path program 27 times [2021-12-17 14:03:23,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:03:23,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382951827] [2021-12-17 14:03:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:03:23,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:03:23,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:03:23,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313485615] [2021-12-17 14:03:23,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 14:03:23,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:23,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:03:23,239 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:03:23,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-17 14:03:38,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-12-17 14:03:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:03:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-17 14:03:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:03:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 56 proven. 1512 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2021-12-17 14:03:39,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:03:42,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:03:42,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382951827] [2021-12-17 14:03:42,702 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:03:42,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313485615] [2021-12-17 14:03:42,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313485615] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:03:42,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:03:42,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-12-17 14:03:42,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912969578] [2021-12-17 14:03:42,702 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:03:42,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 14:03:42,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:03:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 14:03:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=2925, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 14:03:42,704 INFO L87 Difference]: Start difference. First operand 377 states and 396 transitions. Second operand has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-17 14:03:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:03:43,752 INFO L93 Difference]: Finished difference Result 382 states and 400 transitions. [2021-12-17 14:03:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-17 14:03:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 230 [2021-12-17 14:03:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:03:43,754 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:03:43,754 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:03:43,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=867, Invalid=3165, Unknown=0, NotChecked=0, Total=4032 [2021-12-17 14:03:43,756 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 2 mSDsluCounter, 2852 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 14:03:43,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2974 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 14:03:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:03:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:03:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0671378091872792) internal successors, (302), 283 states have internal predecessors, (302), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:03:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 395 transitions. [2021-12-17 14:03:43,769 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 395 transitions. Word has length 230 [2021-12-17 14:03:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:03:43,769 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 395 transitions. [2021-12-17 14:03:43,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 29 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-17 14:03:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 395 transitions. [2021-12-17 14:03:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-17 14:03:43,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:03:43,771 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1] [2021-12-17 14:03:43,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-17 14:03:43,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-17 14:03:43,986 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:03:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:03:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1996048644, now seen corresponding path program 28 times [2021-12-17 14:03:43,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:03:43,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359391280] [2021-12-17 14:03:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:03:43,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:03:43,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:03:43,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106241214] [2021-12-17 14:03:43,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 14:03:43,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:43,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:03:43,995 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:03:43,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-17 14:03:48,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 14:03:48,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:03:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-17 14:03:48,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:03:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 58 proven. 1624 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2021-12-17 14:03:49,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:03:49,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:03:49,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359391280] [2021-12-17 14:03:49,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:03:49,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106241214] [2021-12-17 14:03:49,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106241214] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:03:49,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:03:49,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-12-17 14:03:49,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782742160] [2021-12-17 14:03:49,387 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:03:49,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 14:03:49,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:03:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 14:03:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 14:03:49,388 INFO L87 Difference]: Start difference. First operand 377 states and 395 transitions. Second operand has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 33 states have internal predecessors, (95), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-17 14:03:50,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:03:50,453 INFO L93 Difference]: Finished difference Result 382 states and 399 transitions. [2021-12-17 14:03:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-17 14:03:50,455 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 33 states have internal predecessors, (95), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 238 [2021-12-17 14:03:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:03:50,456 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:03:50,456 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:03:50,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 14:03:50,457 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 2 mSDsluCounter, 3040 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:03:50,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3166 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 14:03:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:03:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:03:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0636042402826855) internal successors, (301), 283 states have internal predecessors, (301), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:03:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 394 transitions. [2021-12-17 14:03:50,466 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 394 transitions. Word has length 238 [2021-12-17 14:03:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:03:50,466 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 394 transitions. [2021-12-17 14:03:50,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 33 states have internal predecessors, (95), 30 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-17 14:03:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 394 transitions. [2021-12-17 14:03:50,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-17 14:03:50,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:03:50,468 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1] [2021-12-17 14:03:50,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-17 14:03:50,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-17 14:03:50,676 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:03:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:03:50,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1138215274, now seen corresponding path program 29 times [2021-12-17 14:03:50,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:03:50,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076780456] [2021-12-17 14:03:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:03:50,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:03:50,682 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:03:50,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069893220] [2021-12-17 14:03:50,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 14:03:50,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:03:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:03:50,683 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:03:50,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-17 14:04:19,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-12-17 14:04:19,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:04:19,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 124 conjunts are in the unsatisfiable core [2021-12-17 14:04:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:04:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 60 proven. 1740 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2021-12-17 14:04:20,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:04:20,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:04:20,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076780456] [2021-12-17 14:04:20,878 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:04:20,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069893220] [2021-12-17 14:04:20,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069893220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:04:20,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:04:20,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-12-17 14:04:20,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290410194] [2021-12-17 14:04:20,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:04:20,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 14:04:20,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:04:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 14:04:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 14:04:20,879 INFO L87 Difference]: Start difference. First operand 377 states and 394 transitions. Second operand has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 34 states have internal predecessors, (98), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-17 14:04:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:04:22,037 INFO L93 Difference]: Finished difference Result 382 states and 398 transitions. [2021-12-17 14:04:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 14:04:22,038 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 34 states have internal predecessors, (98), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 246 [2021-12-17 14:04:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:04:22,039 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:04:22,039 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:04:22,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 14:04:22,040 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 2 mSDsluCounter, 3234 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:04:22,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3364 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 14:04:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:04:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:04:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0600706713780919) internal successors, (300), 283 states have internal predecessors, (300), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:04:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 393 transitions. [2021-12-17 14:04:22,052 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 393 transitions. Word has length 246 [2021-12-17 14:04:22,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:04:22,052 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 393 transitions. [2021-12-17 14:04:22,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.8823529411764706) internal successors, (98), 34 states have internal predecessors, (98), 31 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-17 14:04:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 393 transitions. [2021-12-17 14:04:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-17 14:04:22,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:04:22,054 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1] [2021-12-17 14:04:22,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-17 14:04:22,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:04:22,263 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:04:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:04:22,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1652915248, now seen corresponding path program 30 times [2021-12-17 14:04:22,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:04:22,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021478401] [2021-12-17 14:04:22,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:04:22,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:04:22,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:04:22,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090507750] [2021-12-17 14:04:22,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 14:04:22,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:04:22,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:04:22,273 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:04:22,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-17 14:05:21,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-12-17 14:05:21,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:05:22,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-17 14:05:22,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:05:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 62 proven. 1860 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2021-12-17 14:05:23,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:05:23,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:05:23,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021478401] [2021-12-17 14:05:23,276 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:05:23,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090507750] [2021-12-17 14:05:23,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090507750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:05:23,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:05:23,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-12-17 14:05:23,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200934702] [2021-12-17 14:05:23,276 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:05:23,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-17 14:05:23,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:05:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-17 14:05:23,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-12-17 14:05:23,277 INFO L87 Difference]: Start difference. First operand 377 states and 393 transitions. Second operand has 36 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 14:05:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:05:24,442 INFO L93 Difference]: Finished difference Result 382 states and 397 transitions. [2021-12-17 14:05:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 14:05:24,442 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 254 [2021-12-17 14:05:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:05:24,443 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:05:24,443 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:05:24,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 14:05:24,444 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 2 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:05:24,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3568 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 14:05:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:05:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:05:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0565371024734982) internal successors, (299), 283 states have internal predecessors, (299), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:05:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 392 transitions. [2021-12-17 14:05:24,453 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 392 transitions. Word has length 254 [2021-12-17 14:05:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:05:24,454 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 392 transitions. [2021-12-17 14:05:24,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.8857142857142857) internal successors, (101), 35 states have internal predecessors, (101), 32 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-17 14:05:24,454 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 392 transitions. [2021-12-17 14:05:24,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-17 14:05:24,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:05:24,455 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1] [2021-12-17 14:05:24,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-17 14:05:24,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-17 14:05:24,664 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:05:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:05:24,664 INFO L85 PathProgramCache]: Analyzing trace with hash 17266742, now seen corresponding path program 31 times [2021-12-17 14:05:24,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:05:24,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460344239] [2021-12-17 14:05:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:05:24,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:05:24,669 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:05:24,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292706061] [2021-12-17 14:05:24,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 14:05:24,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:05:24,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:05:24,670 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:05:24,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-17 14:05:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:05:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-17 14:05:25,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:05:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 239 proven. 1989 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2021-12-17 14:05:26,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:05:31,121 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* (- 13) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse2 (* (- 6) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse1 (* (- 1) |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (= (mod (+ .cse0 .cse1 .cse2) (- 4)) 0)) (< (div (+ .cse0 .cse2 .cse1 (- 4)) (- 4)) (+ |c_ULTIMATE.start_main_~x~0#1| (* 3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 1)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (= (+ (* 2 |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 1) (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))) (<= |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~c~0#1|) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|))))) is different from false [2021-12-17 14:05:33,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:05:33,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460344239] [2021-12-17 14:05:33,145 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:05:33,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292706061] [2021-12-17 14:05:33,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292706061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:05:33,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:05:33,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-12-17 14:05:33,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165852794] [2021-12-17 14:05:33,146 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:05:33,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 14:05:33,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:05:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 14:05:33,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1875, Unknown=1, NotChecked=86, Total=2070 [2021-12-17 14:05:33,147 INFO L87 Difference]: Start difference. First operand 377 states and 392 transitions. Second operand has 41 states, 40 states have (on average 2.675) internal successors, (107), 38 states have internal predecessors, (107), 33 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-17 14:05:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:05:34,468 INFO L93 Difference]: Finished difference Result 382 states and 396 transitions. [2021-12-17 14:05:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 14:05:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.675) internal successors, (107), 38 states have internal predecessors, (107), 33 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 262 [2021-12-17 14:05:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:05:34,470 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:05:34,470 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:05:34,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 229 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=129, Invalid=2130, Unknown=1, NotChecked=92, Total=2352 [2021-12-17 14:05:34,470 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 9 mSDsluCounter, 3642 mSDsCounter, 0 mSdLazyCounter, 2654 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3745 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 14:05:34,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3745 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2654 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 14:05:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:05:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:05:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0530035335689045) internal successors, (298), 283 states have internal predecessors, (298), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:05:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 391 transitions. [2021-12-17 14:05:34,481 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 391 transitions. Word has length 262 [2021-12-17 14:05:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:05:34,481 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 391 transitions. [2021-12-17 14:05:34,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.675) internal successors, (107), 38 states have internal predecessors, (107), 33 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-17 14:05:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 391 transitions. [2021-12-17 14:05:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-17 14:05:34,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:05:34,482 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1] [2021-12-17 14:05:34,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-17 14:05:34,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-17 14:05:34,690 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:05:34,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:05:34,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1705289372, now seen corresponding path program 32 times [2021-12-17 14:05:34,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:05:34,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927964654] [2021-12-17 14:05:34,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:05:34,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:05:34,698 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:05:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056585237] [2021-12-17 14:05:34,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 14:05:34,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:05:34,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:05:34,709 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:05:34,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-17 14:05:35,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 14:05:35,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:05:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 136 conjunts are in the unsatisfiable core [2021-12-17 14:05:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:05:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 66 proven. 2112 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2021-12-17 14:05:36,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:05:36,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:05:36,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927964654] [2021-12-17 14:05:36,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:05:36,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056585237] [2021-12-17 14:05:36,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056585237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:05:36,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:05:36,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-12-17 14:05:36,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973212941] [2021-12-17 14:05:36,841 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:05:36,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-17 14:05:36,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:05:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-17 14:05:36,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 14:05:36,842 INFO L87 Difference]: Start difference. First operand 377 states and 391 transitions. Second operand has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-17 14:05:38,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:05:38,048 INFO L93 Difference]: Finished difference Result 382 states and 395 transitions. [2021-12-17 14:05:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 14:05:38,048 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 270 [2021-12-17 14:05:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:05:38,049 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:05:38,049 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:05:38,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 14:05:38,050 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 2 mSDsluCounter, 3852 mSDsCounter, 0 mSdLazyCounter, 2421 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3994 SdHoareTripleChecker+Invalid, 2421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:05:38,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3994 Invalid, 2421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2421 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 14:05:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:05:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:05:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0494699646643109) internal successors, (297), 283 states have internal predecessors, (297), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:05:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 390 transitions. [2021-12-17 14:05:38,059 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 390 transitions. Word has length 270 [2021-12-17 14:05:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:05:38,059 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 390 transitions. [2021-12-17 14:05:38,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.891891891891892) internal successors, (107), 37 states have internal predecessors, (107), 34 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-17 14:05:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 390 transitions. [2021-12-17 14:05:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-12-17 14:05:38,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:05:38,060 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1] [2021-12-17 14:05:38,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-17 14:05:38,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-17 14:05:38,267 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:05:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:05:38,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1014501122, now seen corresponding path program 33 times [2021-12-17 14:05:38,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:05:38,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4838067] [2021-12-17 14:05:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:05:38,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:05:38,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:05:38,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143163334] [2021-12-17 14:05:38,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 14:05:38,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:05:38,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:05:38,273 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:05:38,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-17 14:05:53,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-12-17 14:05:53,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:05:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 140 conjunts are in the unsatisfiable core [2021-12-17 14:05:53,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:05:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 68 proven. 2244 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2021-12-17 14:05:54,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:05:55,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:05:55,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4838067] [2021-12-17 14:05:55,153 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:05:55,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143163334] [2021-12-17 14:05:55,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143163334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:05:55,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:05:55,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-12-17 14:05:55,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394367053] [2021-12-17 14:05:55,154 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:05:55,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-17 14:05:55,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:05:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-17 14:05:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-12-17 14:05:55,155 INFO L87 Difference]: Start difference. First operand 377 states and 390 transitions. Second operand has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-17 14:05:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:05:56,568 INFO L93 Difference]: Finished difference Result 382 states and 394 transitions. [2021-12-17 14:05:56,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 14:05:56,569 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 278 [2021-12-17 14:05:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:05:56,570 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:05:56,570 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:05:56,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 14:05:56,570 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2 mSDsluCounter, 4070 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4216 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 14:05:56,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4216 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2562 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 14:05:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:05:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:05:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0459363957597174) internal successors, (296), 283 states have internal predecessors, (296), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:05:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 389 transitions. [2021-12-17 14:05:56,579 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 389 transitions. Word has length 278 [2021-12-17 14:05:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:05:56,579 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 389 transitions. [2021-12-17 14:05:56,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.8947368421052633) internal successors, (110), 38 states have internal predecessors, (110), 35 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-17 14:05:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 389 transitions. [2021-12-17 14:05:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-12-17 14:05:56,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:05:56,581 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1] [2021-12-17 14:05:56,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-17 14:05:56,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-17 14:05:56,791 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:05:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:05:56,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1890038120, now seen corresponding path program 34 times [2021-12-17 14:05:56,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:05:56,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162822698] [2021-12-17 14:05:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:05:56,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:05:56,798 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:05:56,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219864812] [2021-12-17 14:05:56,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 14:05:56,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:05:56,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:05:56,800 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:05:56,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-17 14:07:27,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 14:07:27,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:07:27,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-17 14:07:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:07:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 70 proven. 2380 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2021-12-17 14:07:28,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:07:28,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:07:28,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162822698] [2021-12-17 14:07:28,893 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:07:28,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219864812] [2021-12-17 14:07:28,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219864812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:07:28,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:07:28,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-12-17 14:07:28,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295407023] [2021-12-17 14:07:28,894 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:07:28,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 14:07:28,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:07:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 14:07:28,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 14:07:28,895 INFO L87 Difference]: Start difference. First operand 377 states and 389 transitions. Second operand has 40 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 39 states have internal predecessors, (113), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-17 14:07:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:07:30,451 INFO L93 Difference]: Finished difference Result 382 states and 393 transitions. [2021-12-17 14:07:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-17 14:07:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 39 states have internal predecessors, (113), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) Word has length 286 [2021-12-17 14:07:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:07:30,452 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:07:30,453 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:07:30,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 14:07:30,453 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 2 mSDsluCounter, 4294 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4444 SdHoareTripleChecker+Invalid, 2707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 14:07:30,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4444 Invalid, 2707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2707 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 14:07:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:07:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:07:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0424028268551238) internal successors, (295), 283 states have internal predecessors, (295), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:07:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 388 transitions. [2021-12-17 14:07:30,470 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 388 transitions. Word has length 286 [2021-12-17 14:07:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:07:30,470 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 388 transitions. [2021-12-17 14:07:30,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.8974358974358974) internal successors, (113), 39 states have internal predecessors, (113), 36 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-17 14:07:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 388 transitions. [2021-12-17 14:07:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-12-17 14:07:30,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:07:30,472 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1] [2021-12-17 14:07:30,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-17 14:07:30,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:07:30,686 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:07:30,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:07:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1733922254, now seen corresponding path program 35 times [2021-12-17 14:07:30,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:07:30,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603814954] [2021-12-17 14:07:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:07:30,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:07:30,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:07:30,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410188155] [2021-12-17 14:07:30,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 14:07:30,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:07:30,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:07:30,693 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:07:30,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-17 14:08:00,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-12-17 14:08:00,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:08:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 148 conjunts are in the unsatisfiable core [2021-12-17 14:08:00,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:08:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 72 proven. 2520 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2021-12-17 14:08:01,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:08:01,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:08:01,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603814954] [2021-12-17 14:08:01,660 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:08:01,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410188155] [2021-12-17 14:08:01,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410188155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:08:01,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:08:01,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-12-17 14:08:01,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269794572] [2021-12-17 14:08:01,661 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:08:01,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-17 14:08:01,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:08:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-17 14:08:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 14:08:01,662 INFO L87 Difference]: Start difference. First operand 377 states and 388 transitions. Second operand has 41 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-17 14:08:03,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:08:03,167 INFO L93 Difference]: Finished difference Result 382 states and 392 transitions. [2021-12-17 14:08:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-17 14:08:03,167 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 294 [2021-12-17 14:08:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:08:03,168 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:08:03,168 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:08:03,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 14:08:03,169 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 2 mSDsluCounter, 4524 mSDsCounter, 0 mSdLazyCounter, 2856 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4678 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 14:08:03,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4678 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2856 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 14:08:03,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:08:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:08:03,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.03886925795053) internal successors, (294), 283 states have internal predecessors, (294), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:08:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 387 transitions. [2021-12-17 14:08:03,183 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 387 transitions. Word has length 294 [2021-12-17 14:08:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:08:03,183 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 387 transitions. [2021-12-17 14:08:03,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 37 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-17 14:08:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 387 transitions. [2021-12-17 14:08:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-17 14:08:03,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:08:03,185 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1] [2021-12-17 14:08:03,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-17 14:08:03,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:08:03,395 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:08:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:08:03,395 INFO L85 PathProgramCache]: Analyzing trace with hash -5004236, now seen corresponding path program 36 times [2021-12-17 14:08:03,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:08:03,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566901161] [2021-12-17 14:08:03,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:08:03,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:08:03,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:08:03,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293078127] [2021-12-17 14:08:03,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 14:08:03,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:08:03,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:08:03,402 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:08:03,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-17 14:08:52,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-12-17 14:08:52,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:08:52,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 152 conjunts are in the unsatisfiable core [2021-12-17 14:08:52,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:08:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 74 proven. 2664 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2021-12-17 14:08:53,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:08:53,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:08:53,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566901161] [2021-12-17 14:08:53,739 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:08:53,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293078127] [2021-12-17 14:08:53,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293078127] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:08:53,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:08:53,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-12-17 14:08:53,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368561473] [2021-12-17 14:08:53,739 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:08:53,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-17 14:08:53,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:08:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-17 14:08:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2021-12-17 14:08:53,740 INFO L87 Difference]: Start difference. First operand 377 states and 387 transitions. Second operand has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 38 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-17 14:08:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:08:55,286 INFO L93 Difference]: Finished difference Result 382 states and 391 transitions. [2021-12-17 14:08:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-17 14:08:55,287 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 38 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 302 [2021-12-17 14:08:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:08:55,288 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:08:55,288 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:08:55,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=2023, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 14:08:55,288 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 2 mSDsluCounter, 4760 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4918 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 14:08:55,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4918 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 14:08:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:08:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:08:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0353356890459364) internal successors, (293), 283 states have internal predecessors, (293), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:08:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 386 transitions. [2021-12-17 14:08:55,297 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 386 transitions. Word has length 302 [2021-12-17 14:08:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:08:55,297 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 386 transitions. [2021-12-17 14:08:55,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 41 states have internal predecessors, (119), 38 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-17 14:08:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 386 transitions. [2021-12-17 14:08:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-17 14:08:55,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:08:55,299 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1] [2021-12-17 14:08:55,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-17 14:08:55,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-17 14:08:55,516 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:08:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:08:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1831078758, now seen corresponding path program 37 times [2021-12-17 14:08:55,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:08:55,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145374990] [2021-12-17 14:08:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:08:55,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:08:55,522 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:08:55,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748421217] [2021-12-17 14:08:55,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 14:08:55,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:08:55,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:08:55,523 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:08:55,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-17 14:08:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:08:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 156 conjunts are in the unsatisfiable core [2021-12-17 14:08:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:08:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 76 proven. 2812 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2021-12-17 14:08:58,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:08:58,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:08:58,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145374990] [2021-12-17 14:08:58,750 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:08:58,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748421217] [2021-12-17 14:08:58,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748421217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:08:58,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:08:58,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-12-17 14:08:58,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145216114] [2021-12-17 14:08:58,750 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:08:58,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-17 14:08:58,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:08:58,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-17 14:08:58,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 14:08:58,751 INFO L87 Difference]: Start difference. First operand 377 states and 386 transitions. Second operand has 43 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 39 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-17 14:09:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:09:00,412 INFO L93 Difference]: Finished difference Result 382 states and 390 transitions. [2021-12-17 14:09:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 14:09:00,412 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 39 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Word has length 310 [2021-12-17 14:09:00,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:09:00,413 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:09:00,413 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:09:00,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2021-12-17 14:09:00,416 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 2 mSDsluCounter, 5002 mSDsCounter, 0 mSdLazyCounter, 3166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5164 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:09:00,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 5164 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3166 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 14:09:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:09:00,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:09:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.0318021201413428) internal successors, (292), 283 states have internal predecessors, (292), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:09:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 385 transitions. [2021-12-17 14:09:00,433 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 385 transitions. Word has length 310 [2021-12-17 14:09:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:09:00,433 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 385 transitions. [2021-12-17 14:09:00,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 39 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-17 14:09:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 385 transitions. [2021-12-17 14:09:00,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-12-17 14:09:00,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:09:00,435 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1] [2021-12-17 14:09:00,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-17 14:09:00,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-17 14:09:00,643 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:09:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:09:00,643 INFO L85 PathProgramCache]: Analyzing trace with hash -201818368, now seen corresponding path program 38 times [2021-12-17 14:09:00,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:09:00,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420956078] [2021-12-17 14:09:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:09:00,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:09:00,650 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:09:00,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474110629] [2021-12-17 14:09:00,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 14:09:00,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:09:00,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:09:00,651 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:09:00,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-17 14:09:01,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 14:09:01,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:09:01,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 160 conjunts are in the unsatisfiable core [2021-12-17 14:09:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:09:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 78 proven. 2964 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2021-12-17 14:09:03,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:09:03,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:09:03,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420956078] [2021-12-17 14:09:03,418 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:09:03,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474110629] [2021-12-17 14:09:03,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474110629] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:09:03,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:09:03,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-12-17 14:09:03,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549965085] [2021-12-17 14:09:03,418 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:09:03,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-17 14:09:03,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:09:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-17 14:09:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2021-12-17 14:09:03,419 INFO L87 Difference]: Start difference. First operand 377 states and 385 transitions. Second operand has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 40 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-17 14:09:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:09:05,096 INFO L93 Difference]: Finished difference Result 382 states and 389 transitions. [2021-12-17 14:09:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 14:09:05,096 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 40 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Word has length 318 [2021-12-17 14:09:05,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:09:05,097 INFO L225 Difference]: With dead ends: 382 [2021-12-17 14:09:05,097 INFO L226 Difference]: Without dead ends: 377 [2021-12-17 14:09:05,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2021-12-17 14:09:05,098 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 2 mSDsluCounter, 5250 mSDsCounter, 0 mSdLazyCounter, 3327 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5416 SdHoareTripleChecker+Invalid, 3327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 14:09:05,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 5416 Invalid, 3327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3327 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-17 14:09:05,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-17 14:09:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2021-12-17 14:09:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 283 states have (on average 1.028268551236749) internal successors, (291), 283 states have internal predecessors, (291), 47 states have call successors, (47), 47 states have call predecessors, (47), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-17 14:09:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 384 transitions. [2021-12-17 14:09:05,106 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 384 transitions. Word has length 318 [2021-12-17 14:09:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:09:05,107 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 384 transitions. [2021-12-17 14:09:05,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 40 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-17 14:09:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 384 transitions. [2021-12-17 14:09:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-17 14:09:05,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:09:05,108 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1] [2021-12-17 14:09:05,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-17 14:09:05,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-17 14:09:05,316 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:09:05,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:09:05,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1882145638, now seen corresponding path program 39 times [2021-12-17 14:09:05,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:09:05,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830453921] [2021-12-17 14:09:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:09:05,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:09:05,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:09:05,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441678759] [2021-12-17 14:09:05,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 14:09:05,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:09:05,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:09:05,323 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:09:05,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process Killed by 15