/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.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 00:37:00,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 00:37:00,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 00:37:00,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 00:37:00,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 00:37:00,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 00:37:00,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 00:37:00,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 00:37:00,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 00:37:00,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 00:37:00,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 00:37:00,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 00:37:00,848 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 00:37:00,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 00:37:00,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 00:37:00,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 00:37:00,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 00:37:00,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 00:37:00,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 00:37:00,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 00:37:00,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 00:37:00,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 00:37:00,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 00:37:00,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 00:37:00,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 00:37:00,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 00:37:00,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 00:37:00,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 00:37:00,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 00:37:00,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 00:37:00,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 00:37:00,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 00:37:00,877 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 00:37:00,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 00:37:00,877 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 00:37:00,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 00:37:00,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 00:37:00,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 00:37:00,878 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 00:37:00,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 00:37:00,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:37:00,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 00:37:00,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 00:37:00,879 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 00:37:00,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 00:37:01,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 00:37:01,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 00:37:01,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 00:37:01,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 00:37:01,138 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 00:37:01,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2022-04-05 00:37:01,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec89d37d0/f5abec93526c446dbde212745335241d/FLAGb37e52e02 [2022-04-05 00:37:01,560 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 00:37:01,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2022-04-05 00:37:01,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec89d37d0/f5abec93526c446dbde212745335241d/FLAGb37e52e02 [2022-04-05 00:37:01,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec89d37d0/f5abec93526c446dbde212745335241d [2022-04-05 00:37:01,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 00:37:01,583 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 00:37:01,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 00:37:01,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 00:37:01,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 00:37:01,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:37:01" (1/1) ... [2022-04-05 00:37:01,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd56069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01, skipping insertion in model container [2022-04-05 00:37:01,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 12:37:01" (1/1) ... [2022-04-05 00:37:01,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 00:37:01,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 00:37:01,757 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.v+cfa-reducer.c[1014,1027] [2022-04-05 00:37:01,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:37:01,766 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 00:37:01,779 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.v+cfa-reducer.c[1014,1027] [2022-04-05 00:37:01,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 00:37:01,788 INFO L208 MainTranslator]: Completed translation [2022-04-05 00:37:01,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01 WrapperNode [2022-04-05 00:37:01,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 00:37:01,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 00:37:01,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 00:37:01,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 00:37:01,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01" (1/1) ... [2022-04-05 00:37:01,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01" (1/1) ... [2022-04-05 00:37:01,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01" (1/1) ... [2022-04-05 00:37:01,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01" (1/1) ... [2022-04-05 00:37:01,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01" (1/1) ... [2022-04-05 00:37:01,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01" (1/1) ... [2022-04-05 00:37:01,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01" (1/1) ... [2022-04-05 00:37:01,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 00:37:01,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 00:37:01,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 00:37:01,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 00:37:01,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01" (1/1) ... [2022-04-05 00:37:01,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 00:37:01,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:37:01,856 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) [2022-04-05 00:37:01,876 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 [2022-04-05 00:37:01,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 00:37:01,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 00:37:01,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 00:37:01,909 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 00:37:01,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 00:37:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 00:37:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 00:37:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 00:37:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 00:37:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 00:37:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 00:37:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 00:37:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 00:37:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 00:37:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 00:37:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 00:37:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 00:37:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 00:37:01,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 00:37:01,966 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 00:37:01,968 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 00:37:02,039 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 00:37:02,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 00:37:02,044 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-04-05 00:37:02,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:37:02 BoogieIcfgContainer [2022-04-05 00:37:02,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 00:37:02,046 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 00:37:02,046 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 00:37:02,047 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 00:37:02,049 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:37:02" (1/1) ... [2022-04-05 00:37:02,051 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 00:37:02,665 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-05 00:37:02,666 INFO L91 elerationTransformer]: Accelerated Formula: (and (= (+ v_main_~main__i~0_3 1) v_main_~main__i~0_2) (= v_main_~main__sum~0_2 (+ v_main_~main__sum~0_3 v_main_~main__i~0_3)) (<= v_main_~main__i~0_3 v_main_~main__n~0_3)) InVars {main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_3, main_~main__i~0=v_main_~main__i~0_3} OutVars{main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_2, main_~main__i~0=v_main_~main__i~0_2} AuxVars[] AssignedVars[main_~main__sum~0, main_~main__i~0] to Formula: (let ((.cse1 (* (- 1) v_main_~main__i~0_3))) (or (and (= v_main_~main__i~0_3 v_main_~main__i~0_2) (= v_main_~main__sum~0_3 v_main_~main__sum~0_2) (< v_main_~main__n~0_3 v_main_~main__i~0_3)) (let ((.cse0 (div (+ .cse1 v_main_~main__i~0_2) 2))) (and (<= .cse0 (+ (div (+ (- 1) .cse1 v_main_~main__n~0_3) 2) 1)) (= (mod (+ v_main_~main__i~0_3 v_main_~main__i~0_2) 2) 0) (< 0 .cse0) (= (+ .cse0 v_main_~main__sum~0_2) (+ (* 2 (* .cse0 v_main_~main__i~0_3)) v_main_~main__sum~0_3 (* 2 (* .cse0 .cse0)))))) (let ((.cse2 (div (+ (- 1) .cse1 v_main_~main__i~0_2) 2))) (and (= (mod (+ v_main_~main__i~0_3 v_main_~main__i~0_2 1) 2) 0) (<= .cse2 (div (+ .cse1 v_main_~main__n~0_3) 2)) (<= 0 .cse2) (= v_main_~main__sum~0_2 (+ (* 2 (* .cse2 v_main_~main__i~0_3)) (* (* .cse2 .cse2) 2) v_main_~main__sum~0_3 .cse2 v_main_~main__i~0_3)))))) InVars {main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_3, main_~main__i~0=v_main_~main__i~0_3} OutVars{main_~main__n~0=v_main_~main__n~0_3, main_~main__sum~0=v_main_~main__sum~0_2, main_~main__i~0=v_main_~main__i~0_2} AuxVars[] AssignedVars[main_~main__sum~0, main_~main__i~0] [2022-04-05 00:37:02,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:37:02 BasicIcfg [2022-04-05 00:37:02,671 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 00:37:02,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 00:37:02,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 00:37:02,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 00:37:02,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 12:37:01" (1/4) ... [2022-04-05 00:37:02,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751af54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:37:02, skipping insertion in model container [2022-04-05 00:37:02,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 12:37:01" (2/4) ... [2022-04-05 00:37:02,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751af54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 12:37:02, skipping insertion in model container [2022-04-05 00:37:02,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 12:37:02" (3/4) ... [2022-04-05 00:37:02,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751af54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 12:37:02, skipping insertion in model container [2022-04-05 00:37:02,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 12:37:02" (4/4) ... [2022-04-05 00:37:02,678 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.cJordan [2022-04-05 00:37:02,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 00:37:02,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 00:37:02,722 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 00:37:02,731 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 [2022-04-05 00:37:02,731 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 00:37:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-04-05 00:37:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 00:37:02,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:37:02,749 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:37:02,750 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:37:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:37:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash 323261602, now seen corresponding path program 1 times [2022-04-05 00:37:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:37:02,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878167143] [2022-04-05 00:37:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:37:02,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:37:02,833 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 00:37:02,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133220594] [2022-04-05 00:37:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:37:02,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:37:02,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:37:02,836 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) [2022-04-05 00:37:02,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 00:37:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:37:02,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 00:37:02,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:37:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:37:02,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 00:37:02,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:37:02,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878167143] [2022-04-05 00:37:02,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 00:37:02,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133220594] [2022-04-05 00:37:02,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133220594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 00:37:02,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 00:37:02,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 00:37:02,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360645861] [2022-04-05 00:37:02,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 00:37:02,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 00:37:02,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:37:03,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 00:37:03,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-05 00:37:03,011 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-05 00:37:03,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:37:03,036 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-05 00:37:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 00:37:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2022-04-05 00:37:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:37:03,044 INFO L225 Difference]: With dead ends: 19 [2022-04-05 00:37:03,044 INFO L226 Difference]: Without dead ends: 13 [2022-04-05 00:37:03,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-05 00:37:03,048 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 00:37:03,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 00:37:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-05 00:37:03,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-05 00:37:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-04-05 00:37:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-04-05 00:37:03,072 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-04-05 00:37:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:37:03,073 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-04-05 00:37:03,073 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-04-05 00:37:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-04-05 00:37:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 00:37:03,074 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:37:03,074 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:37:03,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 00:37:03,287 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 [2022-04-05 00:37:03,288 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:37:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:37:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1431144312, now seen corresponding path program 1 times [2022-04-05 00:37:03,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:37:03,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818457538] [2022-04-05 00:37:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:37:03,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:37:03,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 00:37:03,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776083750] [2022-04-05 00:37:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:37:03,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:37:03,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:37:03,304 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) [2022-04-05 00:37:03,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 00:37:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 00:37:03,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 00:37:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:37:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:37:06,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:37:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:37:11,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:37:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818457538] [2022-04-05 00:37:11,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 00:37:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776083750] [2022-04-05 00:37:11,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776083750] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:37:11,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 00:37:11,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-05 00:37:11,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884599292] [2022-04-05 00:37:11,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 00:37:11,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 00:37:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:37:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 00:37:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=47, Unknown=1, NotChecked=0, Total=72 [2022-04-05 00:37:11,924 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. 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) [2022-04-05 00:37:13,959 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 [] [2022-04-05 00:37:15,988 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 [] [2022-04-05 00:37:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:37:19,572 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-04-05 00:37:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 00:37:19,572 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 12 [2022-04-05 00:37:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:37:19,573 INFO L225 Difference]: With dead ends: 15 [2022-04-05 00:37:19,573 INFO L226 Difference]: Without dead ends: 14 [2022-04-05 00:37:19,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=31, Invalid=57, Unknown=2, NotChecked=0, Total=90 [2022-04-05 00:37:19,574 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:37:19,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 2 Unknown, 7 Unchecked, 4.1s Time] [2022-04-05 00:37:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-05 00:37:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-05 00:37:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2022-04-05 00:37:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-05 00:37:19,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-04-05 00:37:19,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:37:19,577 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-05 00:37:19,578 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) [2022-04-05 00:37:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-05 00:37:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 00:37:19,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:37:19,578 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:37:19,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-05 00:37:19,779 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 [2022-04-05 00:37:19,780 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:37:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:37:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1415769954, now seen corresponding path program 2 times [2022-04-05 00:37:19,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:37:19,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338561071] [2022-04-05 00:37:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:37:19,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:37:19,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 00:37:19,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418057404] [2022-04-05 00:37:19,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 00:37:19,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:37:19,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:37:19,803 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) [2022-04-05 00:37:19,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 00:37:21,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 00:37:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 00:37:21,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 00:37:21,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 00:38:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:38:09,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 00:38:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 00:38:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 00:38:44,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338561071] [2022-04-05 00:38:44,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 00:38:44,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418057404] [2022-04-05 00:38:44,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418057404] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 00:38:44,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 00:38:44,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-04-05 00:38:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669301828] [2022-04-05 00:38:44,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 00:38:44,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 00:38:44,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 00:38:44,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 00:38:44,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=69, Unknown=9, NotChecked=0, Total=110 [2022-04-05 00:38:44,727 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-04-05 00:38:55,036 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 [] [2022-04-05 00:39:12,188 WARN L232 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 137 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 00:39:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 00:39:12,192 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-04-05 00:39:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 00:39:12,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 13 [2022-04-05 00:39:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 00:39:12,193 INFO L225 Difference]: With dead ends: 16 [2022-04-05 00:39:12,193 INFO L226 Difference]: Without dead ends: 15 [2022-04-05 00:39:12,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=45, Invalid=94, Unknown=17, NotChecked=0, Total=156 [2022-04-05 00:39:12,195 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-05 00:39:12,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 1 Unknown, 14 Unchecked, 2.1s Time] [2022-04-05 00:39:12,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-05 00:39:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-05 00:39:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-04-05 00:39:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-05 00:39:12,198 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-04-05 00:39:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 00:39:12,199 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-05 00:39:12,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-04-05 00:39:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-05 00:39:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 00:39:12,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 00:39:12,200 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 00:39:12,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 00:39:12,400 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 [2022-04-05 00:39:12,401 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 00:39:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 00:39:12,401 INFO L85 PathProgramCache]: Analyzing trace with hash 939164856, now seen corresponding path program 3 times [2022-04-05 00:39:12,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 00:39:12,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916655424] [2022-04-05 00:39:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 00:39:12,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 00:39:12,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 00:39:12,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892699790] [2022-04-05 00:39:12,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 00:39:12,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 00:39:12,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 00:39:12,423 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) [2022-04-05 00:39:12,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process