/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:46:23,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:46:23,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:46:23,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 03:46:23,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 03:46:23,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 03:46:23,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 03:46:23,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 03:46:23,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 03:46:23,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 03:46:23,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 03:46:23,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 03:46:23,435 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 03:46:23,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 03:46:23,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 03:46:23,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 03:46:23,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 03:46:23,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 03:46:23,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:46:23,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:46:23,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:46:23,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:46:23,460 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:46:23,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:46:23,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:46:23,462 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:46:23,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:46:23,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:46:23,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:46:23,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:46:23,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:46:23,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:46:23,463 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:46:23,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:46:23,463 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:46:23,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:46:23,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:46:23,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:46:23,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:46:23,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:46:23,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:46:23,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:46:23,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:46:23,464 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:46:23,464 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:46:23,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:46:23,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:46:23,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:46:23,663 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:46:23,663 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:46:23,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2022-03-20 03:46:23,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f96cf2b/538404f62b8f43af84b53ca69bfcbc38/FLAGb5a690df5 [2022-03-20 03:46:24,028 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:46:24,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2022-03-20 03:46:24,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f96cf2b/538404f62b8f43af84b53ca69bfcbc38/FLAGb5a690df5 [2022-03-20 03:46:24,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10f96cf2b/538404f62b8f43af84b53ca69bfcbc38 [2022-03-20 03:46:24,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:46:24,458 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:46:24,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:46:24,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:46:24,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:46:24,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69b59970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24, skipping insertion in model container [2022-03-20 03:46:24,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:46:24,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:46:24,635 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c[1444,1457] [2022-03-20 03:46:24,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:46:24,646 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:46:24,666 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c[1444,1457] [2022-03-20 03:46:24,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:46:24,679 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:46:24,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24 WrapperNode [2022-03-20 03:46:24,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:46:24,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:46:24,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:46:24,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:46:24,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:46:24,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:46:24,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:46:24,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:46:24,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:46:24,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:46:24,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 03:46:24,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 03:46:24,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:46:24,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:46:24,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:46:24,773 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 03:46:24,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:46:24,773 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:46:24,773 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:46:24,773 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:46:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:46:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 03:46:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:46:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 03:46:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:46:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:46:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:46:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:46:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:46:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:46:24,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:46:24,821 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:46:24,823 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:46:24,944 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:46:24,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:46:24,948 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-20 03:46:24,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:46:24 BoogieIcfgContainer [2022-03-20 03:46:24,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:46:24,950 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:46:24,950 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:46:24,950 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:46:24,952 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:46:24" (1/1) ... [2022-03-20 03:46:24,954 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:46:25,894 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 03:46:25,895 INFO L91 elerationTransformer]: Accelerated Formula: (and (= (+ v_main_~main__sum~0_4 v_main_~main__i~0_4) v_main_~main__sum~0_3) (= (+ v_main_~main__i~0_4 1) v_main_~main__i~0_3) (<= v_main_~main__i~0_4 v_main_~main__n~0_2)) InVars {main_~main__n~0=v_main_~main__n~0_2, main_~main__sum~0=v_main_~main__sum~0_4, main_~main__i~0=v_main_~main__i~0_4} OutVars{main_~main__n~0=v_main_~main__n~0_2, main_~main__sum~0=v_main_~main__sum~0_3, main_~main__i~0=v_main_~main__i~0_3} AuxVars[] AssignedVars[main_~main__sum~0, main_~main__i~0] to Formula: (let ((.cse1 (* (- 1) v_main_~main__i~0_4))) (or (let ((.cse0 (div (+ .cse1 v_main_~main__i~0_3) 2))) (and (= (mod (+ v_main_~main__i~0_4 v_main_~main__i~0_3) 2) 0) (= (+ (* (* .cse0 .cse0) 2) (* (* .cse0 v_main_~main__i~0_4) 2) v_main_~main__sum~0_4) (+ .cse0 v_main_~main__sum~0_3)) (<= .cse0 (+ (div (+ (- 1) .cse1 v_main_~main__n~0_2) 2) 1)) (< 0 .cse0))) (and (not (<= v_main_~main__i~0_4 v_main_~main__n~0_2)) (= v_main_~main__i~0_4 v_main_~main__i~0_3) (= v_main_~main__sum~0_4 v_main_~main__sum~0_3)) (let ((.cse2 (div (+ (- 1) .cse1 v_main_~main__i~0_3) 2))) (and (= (+ .cse2 v_main_~main__sum~0_4 (* 2 (* .cse2 .cse2)) (* 2 (* .cse2 v_main_~main__i~0_4)) v_main_~main__i~0_4) v_main_~main__sum~0_3) (<= 0 .cse2) (= (mod (+ v_main_~main__i~0_4 v_main_~main__i~0_3 1) 2) 0) (<= .cse2 (div (+ .cse1 v_main_~main__n~0_2) 2)))))) InVars {main_~main__n~0=v_main_~main__n~0_2, main_~main__sum~0=v_main_~main__sum~0_4, main_~main__i~0=v_main_~main__i~0_4} OutVars{main_~main__n~0=v_main_~main__n~0_2, main_~main__sum~0=v_main_~main__sum~0_3, main_~main__i~0=v_main_~main__i~0_3} AuxVars[] AssignedVars[main_~main__sum~0, main_~main__i~0] [2022-03-20 03:46:25,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:46:25 BasicIcfg [2022-03-20 03:46:25,898 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:46:25,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:46:25,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:46:25,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:46:25,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:46:24" (1/4) ... [2022-03-20 03:46:25,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b2d3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:46:25, skipping insertion in model container [2022-03-20 03:46:25,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:46:24" (2/4) ... [2022-03-20 03:46:25,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b2d3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:46:25, skipping insertion in model container [2022-03-20 03:46:25,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:46:24" (3/4) ... [2022-03-20 03:46:25,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b2d3b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:46:25, skipping insertion in model container [2022-03-20 03:46:25,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:46:25" (4/4) ... [2022-03-20 03:46:25,906 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.cJordan [2022-03-20 03:46:25,909 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:46:25,909 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:46:25,938 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:46:25,944 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 03:46:25,944 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:46:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:46:25,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 03:46:25,957 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:46:25,957 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:46:25,958 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:46:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:46:25,961 INFO L85 PathProgramCache]: Analyzing trace with hash 456799944, now seen corresponding path program 1 times [2022-03-20 03:46:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:46:25,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448453712] [2022-03-20 03:46:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:46:25,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:46:26,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 03:46:26,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630802521] [2022-03-20 03:46:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:46:26,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:46:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:46:26,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:46:26,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:46:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:26,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 03:46:26,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:46:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:46:26,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:46:26,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:46:26,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448453712] [2022-03-20 03:46:26,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 03:46:26,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630802521] [2022-03-20 03:46:26,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630802521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:46:26,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:46:26,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 03:46:26,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291321729] [2022-03-20 03:46:26,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:46:26,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 03:46:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:46:26,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 03:46:26,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-20 03:46:26,349 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:46:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:46:26,466 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-03-20 03:46:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:46:26,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 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 [2022-03-20 03:46:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:46:26,472 INFO L225 Difference]: With dead ends: 35 [2022-03-20 03:46:26,473 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 03:46:26,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 03:46:26,477 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:46:26,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 194 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:46:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 03:46:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 03:46:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 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) [2022-03-20 03:46:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-20 03:46:26,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-03-20 03:46:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:46:26,500 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-20 03:46:26,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:46:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-20 03:46:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 03:46:26,501 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:46:26,501 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:46:26,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 03:46:26,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-20 03:46:26,720 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:46:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:46:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1275865648, now seen corresponding path program 1 times [2022-03-20 03:46:26,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:46:26,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448964641] [2022-03-20 03:46:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:46:26,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:46:26,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 03:46:26,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271644283] [2022-03-20 03:46:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:46:26,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:46:26,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:46:26,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:46:26,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:46:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:46:27,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 03:46:27,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:46:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:46:29,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:47:19,514 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~main__n~0 Int)) (or (not (<= (+ 3 c_main_~main__i~0) main_~main__n~0)) (and (or (= (+ 12 (* c_main_~main__sum~0 2) (* 8 c_main_~main__i~0)) (+ (* main_~main__n~0 main_~main__n~0) main_~main__n~0)) (<= (+ 4 c_main_~main__i~0) main_~main__n~0)) (forall ((aux_div_v_main_~main__i~0_32_64 Int) (aux_div_aux_mod_v_main_~main__i~0_32_64_39 Int)) (let ((.cse2 (* 2 aux_div_v_main_~main__i~0_32_64)) (.cse0 (* aux_div_aux_mod_v_main_~main__i~0_32_64_39 2))) (or (<= 2 .cse0) (= (let ((.cse1 (div (+ .cse2 .cse0) 2))) (+ (* 2 .cse1) (* 10 c_main_~main__i~0) (* (* (+ 4 c_main_~main__i~0) .cse1) 4) (* (* .cse1 .cse1) 4) 20 (* c_main_~main__sum~0 2))) (+ (* main_~main__n~0 main_~main__n~0) main_~main__n~0)) (<= (+ .cse2 5 .cse0 c_main_~main__i~0) main_~main__n~0) (< (div (+ (* (- 1) c_main_~main__i~0) (- 4) main_~main__n~0) 2) (+ aux_div_aux_mod_v_main_~main__i~0_32_64_39 aux_div_v_main_~main__i~0_32_64)) (< .cse0 0)))) (forall ((aux_div_v_main_~main__i~0_32_48 Int)) (let ((.cse3 (* 2 aux_div_v_main_~main__i~0_32_48))) (or (<= .cse3 (+ 4 main_~main__n~0 c_main_~main__i~0)) (let ((.cse4 (div (+ .cse3 (* (- 2) c_main_~main__i~0) (- 8)) 2))) (= (+ (* .cse4 2) (* main_~main__n~0 main_~main__n~0) main_~main__n~0) (+ (* (* (+ 4 c_main_~main__i~0) .cse4) 4) (* (* .cse4 .cse4) 4) 12 (* c_main_~main__sum~0 2) (* 8 c_main_~main__i~0)))) (< (+ 5 (div (+ (* (- 1) c_main_~main__i~0) (- 5) main_~main__n~0) 2) c_main_~main__i~0) aux_div_v_main_~main__i~0_32_48))))))) is different from false [2022-03-20 03:47:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:47:39,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:47:39,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448964641] [2022-03-20 03:47:39,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 03:47:39,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271644283] [2022-03-20 03:47:39,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271644283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:47:39,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:47:39,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-03-20 03:47:39,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090295171] [2022-03-20 03:47:39,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:47:39,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 03:47:39,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:47:39,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 03:47:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=159, Unknown=26, NotChecked=28, Total=272 [2022-03-20 03:47:39,874 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:47:53,857 WARN L232 SmtUtils]: Spent 10.97s on a formula simplification. DAG size of input: 85 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:47:56,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 03:47:58,863 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 03:48:09,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:48:09,391 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-03-20 03:48:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 03:48:09,392 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 1 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 17 [2022-03-20 03:48:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:48:09,392 INFO L225 Difference]: With dead ends: 20 [2022-03-20 03:48:09,392 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 03:48:09,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 93.9s TimeCoverageRelationStatistics Valid=90, Invalid=262, Unknown=32, NotChecked=36, Total=420 [2022-03-20 03:48:09,394 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:48:09,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 73 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 2 Unknown, 29 Unchecked, 4.1s Time] [2022-03-20 03:48:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 03:48:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-20 03:48:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 2 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) [2022-03-20 03:48:09,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-03-20 03:48:09,396 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-03-20 03:48:09,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:48:09,396 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-03-20 03:48:09,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:48:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-03-20 03:48:09,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 03:48:09,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:48:09,397 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:48:09,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 03:48:09,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-03-20 03:48:09,602 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:48:09,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:48:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash 897098696, now seen corresponding path program 2 times [2022-03-20 03:48:09,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:48:09,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402545434] [2022-03-20 03:48:09,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:48:09,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:48:09,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 03:48:09,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5747781] [2022-03-20 03:48:09,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:48:09,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:48:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:48:09,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:48:09,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 03:48:18,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:48:18,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:48:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 03:48:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:48:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:48:53,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:49:04,700 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((aux_div_v_main_~main__i~0_47_48 Int)) (or (< (+ (div (+ (- 1) (* (- 1) c_main_~main__i~0) c_main_~main__n~0) 2) 1 c_main_~main__i~0) aux_div_v_main_~main__i~0_47_48) (<= aux_div_v_main_~main__i~0_47_48 c_main_~main__i~0) (let ((.cse0 (* (- 2) aux_div_v_main_~main__i~0_47_48))) (and (or (<= (+ 1 (div (+ .cse0 (- 1) c_main_~main__n~0 c_main_~main__i~0) 2)) 0) (forall ((aux_div_v_main_~main__i~0_46_58 Int)) (let ((.cse2 (* (- 2) aux_div_v_main_~main__i~0_47_48))) (or (let ((.cse1 (div (+ (* (- 2) c_main_~main__i~0) (* 2 aux_div_v_main_~main__i~0_47_48)) 2))) (= (+ (* 8 (* aux_div_v_main_~main__i~0_46_58 aux_div_v_main_~main__i~0_47_48)) (* (* .cse1 c_main_~main__i~0) 4) (* (* .cse1 .cse1) 4) (* (* aux_div_v_main_~main__i~0_46_58 aux_div_v_main_~main__i~0_46_58) 4) (* c_main_~main__sum~0 2)) (+ (* .cse1 2) (* (* aux_div_v_main_~main__i~0_46_58 c_main_~main__i~0) 4) c_main_~main__n~0 (* 2 aux_div_v_main_~main__i~0_46_58) (* c_main_~main__n~0 c_main_~main__n~0)))) (< (+ 1 (div (+ .cse2 (- 1) c_main_~main__n~0 c_main_~main__i~0) 2)) aux_div_v_main_~main__i~0_46_58) (<= aux_div_v_main_~main__i~0_46_58 (div (+ .cse2 c_main_~main__n~0 c_main_~main__i~0) 2)))))) (or (<= (+ (div (+ .cse0 c_main_~main__n~0 c_main_~main__i~0) 2) 1) 0) (forall ((aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103 Int)) (let ((.cse3 (* (- 2) aux_div_v_main_~main__i~0_47_48))) (or (<= (+ (div (+ .cse3 c_main_~main__n~0 c_main_~main__i~0) 2) 1) aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103) (<= aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103 (div (+ .cse3 (- 1) c_main_~main__n~0 c_main_~main__i~0) 2)) (let ((.cse4 (div (+ (* (- 2) c_main_~main__i~0) (* 2 aux_div_v_main_~main__i~0_47_48)) 2))) (= (+ (* 2 aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103) (* (* .cse4 c_main_~main__i~0) 4) (* (* .cse4 .cse4) 4) (* (* aux_div_v_main_~main__i~0_47_48 aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103) 8) (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103 aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103) 4) (* c_main_~main__sum~0 2) (* aux_div_v_main_~main__i~0_47_48 4)) (+ (* .cse4 2) (* 2 c_main_~main__i~0) (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103 c_main_~main__i~0) 4) c_main_~main__n~0 (* c_main_~main__n~0 c_main_~main__n~0)))))))) (let ((.cse6 (* 2 aux_div_v_main_~main__i~0_47_48))) (or (let ((.cse5 (div (+ (* (- 2) c_main_~main__i~0) .cse6) 2))) (= (+ (* (* .cse5 c_main_~main__i~0) 4) (* (* .cse5 .cse5) 4) (* c_main_~main__sum~0 2)) (+ (* .cse5 2) c_main_~main__n~0 (* c_main_~main__n~0 c_main_~main__n~0)))) (<= .cse6 (+ c_main_~main__n~0 c_main_~main__i~0)))))))) (forall ((aux_div_v_main_~main__i~0_47_50 Int)) (or (< (+ (div (+ (* (- 1) c_main_~main__i~0) c_main_~main__n~0) 2) 1 c_main_~main__i~0) aux_div_v_main_~main__i~0_47_50) (let ((.cse7 (* (- 2) aux_div_v_main_~main__i~0_47_50))) (and (or (<= (+ (div (+ .cse7 c_main_~main__n~0 1 c_main_~main__i~0) 2) 1) 0) (forall ((aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103 Int)) (let ((.cse8 (* (- 2) aux_div_v_main_~main__i~0_47_50))) (or (<= (+ (div (+ .cse8 c_main_~main__n~0 1 c_main_~main__i~0) 2) 1) aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103) (<= aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103 (div (+ .cse8 c_main_~main__n~0 c_main_~main__i~0) 2)) (= (let ((.cse9 (div (+ (* (- 2) c_main_~main__i~0) (- 2) (* 2 aux_div_v_main_~main__i~0_47_50)) 2))) (+ (* 2 .cse9) (* (* .cse9 .cse9) 4) (* (* c_main_~main__i~0 .cse9) 4) (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103 aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103) 4) (* aux_div_v_main_~main__i~0_47_50 4) (* 8 (* aux_div_v_main_~main__i~0_47_50 aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103)) (* c_main_~main__sum~0 2))) (+ (* 2 aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103) (* (* aux_div_aux_mod_aux_mod_v_main_~main__i~0_46_64_81_103 c_main_~main__i~0) 4) 2 c_main_~main__n~0 (* c_main_~main__n~0 c_main_~main__n~0))))))) (or (forall ((aux_div_v_main_~main__i~0_46_58 Int)) (let ((.cse10 (* (- 2) aux_div_v_main_~main__i~0_47_50))) (or (<= aux_div_v_main_~main__i~0_46_58 (div (+ .cse10 c_main_~main__n~0 1 c_main_~main__i~0) 2)) (< (+ (div (+ .cse10 c_main_~main__n~0 c_main_~main__i~0) 2) 1) aux_div_v_main_~main__i~0_46_58) (= (let ((.cse11 (div (+ (* (- 2) c_main_~main__i~0) (- 2) (* 2 aux_div_v_main_~main__i~0_47_50)) 2))) (+ (* (* aux_div_v_main_~main__i~0_46_58 aux_div_v_main_~main__i~0_47_50) 8) (* 2 c_main_~main__i~0) (* 2 .cse11) (* (* .cse11 .cse11) 4) (* (* aux_div_v_main_~main__i~0_46_58 aux_div_v_main_~main__i~0_46_58) 4) (* (* c_main_~main__i~0 .cse11) 4) (* c_main_~main__sum~0 2))) (+ (* aux_div_v_main_~main__i~0_46_58 6) (* (* aux_div_v_main_~main__i~0_46_58 c_main_~main__i~0) 4) c_main_~main__n~0 (* c_main_~main__n~0 c_main_~main__n~0)))))) (<= (+ (div (+ .cse7 c_main_~main__n~0 c_main_~main__i~0) 2) 1) 0)) (let ((.cse12 (* 2 aux_div_v_main_~main__i~0_47_50))) (or (<= .cse12 (+ c_main_~main__n~0 1 c_main_~main__i~0)) (= (let ((.cse13 (div (+ (* (- 2) c_main_~main__i~0) (- 2) .cse12) 2))) (+ (* 2 c_main_~main__i~0) (* 2 .cse13) (* (* .cse13 .cse13) 4) (* (* c_main_~main__i~0 .cse13) 4) (* c_main_~main__sum~0 2))) (+ c_main_~main__n~0 (* c_main_~main__n~0 c_main_~main__n~0))))))) (< aux_div_v_main_~main__i~0_47_50 (+ 1 c_main_~main__i~0)))) (or (= (+ c_main_~main__n~0 (* c_main_~main__n~0 c_main_~main__n~0)) (* c_main_~main__sum~0 2)) (<= c_main_~main__i~0 c_main_~main__n~0))) is different from false [2022-03-20 03:49:30,179 WARN L232 SmtUtils]: Spent 9.99s on a formula simplification that was a NOOP. DAG size: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:49:57,474 WARN L232 SmtUtils]: Spent 13.30s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:50:23,893 WARN L232 SmtUtils]: Spent 6.77s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:50:52,231 WARN L232 SmtUtils]: Spent 8.36s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:51:22,103 WARN L232 SmtUtils]: Spent 8.45s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:51:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-03-20 03:51:24,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:51:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402545434] [2022-03-20 03:51:24,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 03:51:24,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5747781] [2022-03-20 03:51:24,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5747781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:51:24,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:51:24,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-03-20 03:51:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184506630] [2022-03-20 03:51:24,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:51:24,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 03:51:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:51:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 03:51:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=233, Unknown=37, NotChecked=34, Total=380 [2022-03-20 03:51:24,182 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:51:49,929 WARN L232 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 98 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:51:51,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 03:52:32,954 WARN L232 SmtUtils]: Spent 24.34s on a formula simplification. DAG size of input: 158 DAG size of output: 151 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 03:52:32,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:52:32,958 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-03-20 03:52:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 03:52:32,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 1 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 18 [2022-03-20 03:52:32,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:52:32,958 INFO L225 Difference]: With dead ends: 21 [2022-03-20 03:52:32,958 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 03:52:32,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 220.5s TimeCoverageRelationStatistics Valid=117, Invalid=386, Unknown=53, NotChecked=44, Total=600 [2022-03-20 03:52:32,960 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:52:32,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 73 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 64 Invalid, 1 Unknown, 71 Unchecked, 2.1s Time] [2022-03-20 03:52:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 03:52:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 03:52:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 2 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) [2022-03-20 03:52:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-03-20 03:52:32,971 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2022-03-20 03:52:32,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:52:32,971 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-03-20 03:52:32,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:52:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-03-20 03:52:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 03:52:32,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:52:32,972 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:52:32,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 03:52:33,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:33,177 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:52:33,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:52:33,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2040225072, now seen corresponding path program 3 times [2022-03-20 03:52:33,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:52:33,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001943208] [2022-03-20 03:52:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:52:33,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:52:33,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 03:52:33,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721866482] [2022-03-20 03:52:33,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:52:33,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:52:33,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:52:33,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:52:33,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process