/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-34549b5 [2022-04-06 04:57:16,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 04:57:16,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 04:57:16,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 04:57:16,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 04:57:16,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 04:57:16,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 04:57:16,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 04:57:16,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 04:57:16,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 04:57:16,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 04:57:16,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 04:57:16,084 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 04:57:16,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 04:57:16,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 04:57:16,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 04:57:16,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 04:57:16,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 04:57:16,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 04:57:16,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 04:57:16,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 04:57:16,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 04:57:16,121 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 04:57:16,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 04:57:16,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 04:57:16,124 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 04:57:16,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 04:57:16,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 04:57:16,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 04:57:16,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 04:57:16,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 04:57:16,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 04:57:16,125 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 04:57:16,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 04:57:16,126 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 04:57:16,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 04:57:16,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 04:57:16,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 04:57:16,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 04:57:16,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 04:57:16,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 04:57:16,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 04:57:16,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 04:57:16,128 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 04:57:16,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 04:57:16,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 04:57:16,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 04:57:16,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 04:57:16,378 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 04:57:16,379 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 04:57:16,380 INFO L432 ainManager$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 [2022-04-06 04:57:16,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a3e17553/bb50d180766d4358aaf1af25dd712fb6/FLAG9567b7788 [2022-04-06 04:57:16,835 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 04:57:16,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2022-04-06 04:57:16,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a3e17553/bb50d180766d4358aaf1af25dd712fb6/FLAG9567b7788 [2022-04-06 04:57:17,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a3e17553/bb50d180766d4358aaf1af25dd712fb6 [2022-04-06 04:57:17,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 04:57:17,242 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 04:57:17,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 04:57:17,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 04:57:17,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 04:57:17,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34cc3261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17, skipping insertion in model container [2022-04-06 04:57:17,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 04:57:17,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 04:57:17,430 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] [2022-04-06 04:57:17,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 04:57:17,443 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 04:57:17,457 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] [2022-04-06 04:57:17,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 04:57:17,469 INFO L208 MainTranslator]: Completed translation [2022-04-06 04:57:17,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17 WrapperNode [2022-04-06 04:57:17,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 04:57:17,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 04:57:17,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 04:57:17,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 04:57:17,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 04:57:17,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 04:57:17,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 04:57:17,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 04:57:17,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 04:57:17,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:57:17,540 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) [2022-04-06 04:57:17,568 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 [2022-04-06 04:57:17,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 04:57:17,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 04:57:17,584 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 04:57:17,584 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 04:57:17,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 04:57:17,584 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 04:57:17,584 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 04:57:17,584 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 04:57:17,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 04:57:17,584 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 04:57:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 04:57:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 04:57:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 04:57:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 04:57:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 04:57:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 04:57:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 04:57:17,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 04:57:17,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 04:57:17,640 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 04:57:17,641 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 04:57:17,787 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 04:57:17,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 04:57:17,795 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-04-06 04:57:17,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:57:17 BoogieIcfgContainer [2022-04-06 04:57:17,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 04:57:17,797 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 04:57:17,797 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 04:57:17,801 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 04:57:17,817 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:57:17" (1/1) ... [2022-04-06 04:57:17,819 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 04:57:19,036 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 04:57:19,037 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] [2022-04-06 04:57:19,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 04:57:19 BasicIcfg [2022-04-06 04:57:19,041 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 04:57:19,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 04:57:19,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 04:57:19,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 04:57:19,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:57:17" (1/4) ... [2022-04-06 04:57:19,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3146164b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:57:19, skipping insertion in model container [2022-04-06 04:57:19,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:57:17" (2/4) ... [2022-04-06 04:57:19,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3146164b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:57:19, skipping insertion in model container [2022-04-06 04:57:19,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:57:17" (3/4) ... [2022-04-06 04:57:19,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3146164b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 04:57:19, skipping insertion in model container [2022-04-06 04:57:19,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 04:57:19" (4/4) ... [2022-04-06 04:57:19,058 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.cJordan [2022-04-06 04:57:19,062 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 04:57:19,062 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 04:57:19,105 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 04:57:19,110 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 [2022-04-06 04:57:19,111 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 04:57:19,121 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) [2022-04-06 04:57:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 04:57:19,127 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:57:19,128 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:57:19,128 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:57:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:57:19,133 INFO L85 PathProgramCache]: Analyzing trace with hash 456799944, now seen corresponding path program 1 times [2022-04-06 04:57:19,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:57:19,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413124799] [2022-04-06 04:57:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:57:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:57:19,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 04:57:19,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49026666] [2022-04-06 04:57:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:57:19,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:57:19,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:57:19,251 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) [2022-04-06 04:57:19,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 04:57:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:57:19,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 04:57:19,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:57:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:57:19,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 04:57:19,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:57:19,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413124799] [2022-04-06 04:57:19,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 04:57:19,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49026666] [2022-04-06 04:57:19,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49026666] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:57:19,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:57:19,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 04:57:19,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385930738] [2022-04-06 04:57:19,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:57:19,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 04:57:19,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:57:19,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 04:57:19,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-04-06 04:57:19,614 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) [2022-04-06 04:57:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:57:19,727 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-04-06 04:57:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 04:57:19,735 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 [2022-04-06 04:57:19,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:57:19,740 INFO L225 Difference]: With dead ends: 35 [2022-04-06 04:57:19,740 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 04:57:19,742 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 [2022-04-06 04:57:19,744 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 [2022-04-06 04:57:19,745 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] [2022-04-06 04:57:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 04:57:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 04:57:19,769 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) [2022-04-06 04:57:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-04-06 04:57:19,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2022-04-06 04:57:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:57:19,772 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-04-06 04:57:19,772 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) [2022-04-06 04:57:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-04-06 04:57:19,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 04:57:19,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:57:19,773 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:57:19,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 04:57:19,979 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 [2022-04-06 04:57:19,980 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:57:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:57:19,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1275865648, now seen corresponding path program 1 times [2022-04-06 04:57:19,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:57:19,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039147634] [2022-04-06 04:57:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:57:19,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:57:20,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 04:57:20,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047690836] [2022-04-06 04:57:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:57:20,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:57:20,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:57:20,004 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) [2022-04-06 04:57:20,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 04:57:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:57:20,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 04:57:20,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:57:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:57:23,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:57:36,831 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~main__n~0 Int)) (or (not (<= (+ 1 c_main_~main__i~0) main_~main__n~0)) (and (forall ((aux_div_v_main_~main__i~0_32_48 Int)) (let ((.cse1 (* 2 aux_div_v_main_~main__i~0_32_48))) (or (let ((.cse0 (div (+ .cse1 (* (- 2) c_main_~main__i~0) (- 4)) 2))) (= (+ (* .cse0 2) (* main_~main__n~0 main_~main__n~0) main_~main__n~0) (+ (* (* .cse0 .cse0) 4) 2 (* (* .cse0 (+ 2 c_main_~main__i~0)) 4) (* c_main_~main__sum~0 2) (* 4 c_main_~main__i~0)))) (<= .cse1 (+ 2 main_~main__n~0 c_main_~main__i~0)) (< (+ 3 (div (+ (* (- 1) c_main_~main__i~0) (- 3) main_~main__n~0) 2) c_main_~main__i~0) aux_div_v_main_~main__i~0_32_48)))) (or (<= (+ 2 c_main_~main__i~0) main_~main__n~0) (= (+ 2 (* c_main_~main__sum~0 2) (* 4 c_main_~main__i~0)) (+ (* main_~main__n~0 main_~main__n~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 ((.cse3 (* 2 aux_div_v_main_~main__i~0_32_64)) (.cse4 (* aux_div_aux_mod_v_main_~main__i~0_32_64_39 2))) (or (= (let ((.cse2 (div (+ .cse3 .cse4) 2))) (+ (* (* (+ 2 c_main_~main__i~0) .cse2) 4) (* 2 .cse2) (* 6 c_main_~main__i~0) 6 (* (* .cse2 .cse2) 4) (* c_main_~main__sum~0 2))) (+ (* main_~main__n~0 main_~main__n~0) main_~main__n~0)) (<= 2 .cse4) (< (div (+ (* (- 1) c_main_~main__i~0) (- 2) 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)) (<= (+ .cse3 3 .cse4 c_main_~main__i~0) main_~main__n~0) (< .cse4 0))))))) is different from false [2022-04-06 04:58:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:58:29,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:58:29,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039147634] [2022-04-06 04:58:29,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 04:58:29,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047690836] [2022-04-06 04:58:29,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047690836] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:58:29,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 04:58:29,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-04-06 04:58:29,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912884250] [2022-04-06 04:58:29,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 04:58:29,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 04:58:29,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:58:29,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 04:58:29,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=162, Unknown=23, NotChecked=28, Total=272 [2022-04-06 04:58:29,818 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) [2022-04-06 04:58:48,106 WARN L232 SmtUtils]: Spent 11.31s on a formula simplification. DAG size of input: 82 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 04:58:50,148 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 [] [2022-04-06 04:58:52,164 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 [] [2022-04-06 04:59:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:59:02,822 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-04-06 04:59:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 04:59:02,823 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 [2022-04-06 04:59:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:59:02,823 INFO L225 Difference]: With dead ends: 20 [2022-04-06 04:59:02,823 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 04:59:02,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 93.1s TimeCoverageRelationStatistics Valid=89, Invalid=265, Unknown=30, NotChecked=36, Total=420 [2022-04-06 04:59:02,825 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:59:02,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 73 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 2 Unknown, 36 Unchecked, 4.1s Time] [2022-04-06 04:59:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 04:59:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 04:59:02,828 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) [2022-04-06 04:59:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-04-06 04:59:02,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2022-04-06 04:59:02,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:59:02,829 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-04-06 04:59:02,829 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) [2022-04-06 04:59:02,829 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-04-06 04:59:02,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 04:59:02,830 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:59:02,830 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:59:02,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 04:59:03,030 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 [2022-04-06 04:59:03,031 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:59:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:59:03,032 INFO L85 PathProgramCache]: Analyzing trace with hash 897098696, now seen corresponding path program 2 times [2022-04-06 04:59:03,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:59:03,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535805156] [2022-04-06 04:59:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:59:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:59:03,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 04:59:03,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330429233] [2022-04-06 04:59:03,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 04:59:03,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:59:03,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:59:03,058 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) [2022-04-06 04:59:03,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 04:59:13,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 04:59:13,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 04:59:13,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 04:59:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:59:25,818 WARN L232 SmtUtils]: Spent 5.34s on a formula simplification that was a NOOP. DAG size: 153 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 04:59:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:59:55,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 05:00:26,293 WARN L232 SmtUtils]: Spent 9.03s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 05:00:53,882 WARN L232 SmtUtils]: Spent 9.79s 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) [2022-04-06 05:01:26,710 WARN L232 SmtUtils]: Spent 13.16s 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) [2022-04-06 05:01:57,133 WARN L232 SmtUtils]: Spent 7.50s 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) [2022-04-06 05:02:58,536 WARN L232 SmtUtils]: Spent 7.35s 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) [2022-04-06 05:03:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 05:03:03,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 05:03:03,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535805156] [2022-04-06 05:03:03,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 05:03:03,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330429233] [2022-04-06 05:03:03,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330429233] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 05:03:03,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 05:03:03,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-04-06 05:03:03,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450252565] [2022-04-06 05:03:03,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 05:03:03,516 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 05:03:03,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 05:03:03,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 05:03:03,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=255, Unknown=58, NotChecked=0, Total=380 [2022-04-06 05:03:03,517 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) [2022-04-06 05:03:27,117 WARN L232 SmtUtils]: Spent 10.79s on a formula simplification. DAG size of input: 162 DAG size of output: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 05:04:00,736 WARN L232 SmtUtils]: Spent 16.70s on a formula simplification. DAG size of input: 146 DAG size of output: 143 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 05:04:02,778 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 [] [2022-04-06 05:04:37,699 WARN L232 SmtUtils]: Spent 18.56s 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) [2022-04-06 05:04:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 05:04:37,708 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-04-06 05:04:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 05:04:37,708 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 [2022-04-06 05:04:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 05:04:37,709 INFO L225 Difference]: With dead ends: 21 [2022-04-06 05:04:37,709 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 05:04:37,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 277.9s TimeCoverageRelationStatistics Valid=119, Invalid=452, Unknown=79, NotChecked=0, Total=650 [2022-04-06 05:04:37,711 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 05:04:37,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 1 Unknown, 63 Unchecked, 2.1s Time] [2022-04-06 05:04:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 05:04:37,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-06 05:04:37,714 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) [2022-04-06 05:04:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-04-06 05:04:37,714 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2022-04-06 05:04:37,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 05:04:37,715 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-04-06 05:04:37,715 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) [2022-04-06 05:04:37,715 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-04-06 05:04:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 05:04:37,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 05:04:37,715 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 05:04:37,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 05:04:37,919 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 [2022-04-06 05:04:37,920 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 05:04:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 05:04:37,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2040225072, now seen corresponding path program 3 times [2022-04-06 05:04:37,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 05:04:37,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498640531] [2022-04-06 05:04:37,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 05:04:37,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 05:04:37,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 05:04:37,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713294553] [2022-04-06 05:04:37,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 05:04:37,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 05:04:37,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 05:04:37,935 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) [2022-04-06 05:04:37,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process