/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/nla-digbench-scaling/bresenham-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:29:23,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:29:23,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:29:23,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:29:23,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:29:23,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:29:23,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:29:23,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:29:23,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:29:23,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:29:23,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:29:23,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:29:23,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:29:23,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:29:23,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:29:23,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:29:23,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:29:23,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:29:23,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:29:23,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:29:23,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:29:23,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:29:23,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:29:23,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:29:23,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 19:29:23,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 19:29:23,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 19:29:23,793 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 19:29:23,793 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 19:29:23,794 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 19:29:23,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 19:29:23,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 19:29:23,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 19:29:23,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 19:29:23,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 19:29:23,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 19:29:23,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 19:29:23,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 19:29:23,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:29:23,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:29:23,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:29:23,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:29:23,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:29:23,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:29:23,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:29:23,810 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:29:23,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:29:23,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:29:23,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:29:23,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:29:23,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:29:23,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:29:23,811 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:29:23,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:29:23,811 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:29:23,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:29:23,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:29:23,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:29:23,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:29:23,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:29:23,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:29:23,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:29:23,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:29:23,813 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:29:23,813 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:29:24,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:29:24,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:29:24,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:29:24,095 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:29:24,098 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:29:24,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2021-05-02 19:29:24,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/118a9c938/99879bdde6524500a4bd9b29f6fdf88e/FLAG059b7c147 [2021-05-02 19:29:24,551 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:29:24,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2021-05-02 19:29:24,557 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/118a9c938/99879bdde6524500a4bd9b29f6fdf88e/FLAG059b7c147 [2021-05-02 19:29:24,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/118a9c938/99879bdde6524500a4bd9b29f6fdf88e [2021-05-02 19:29:24,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:29:24,576 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:29:24,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:29:24,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:29:24,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:29:24,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:29:24" (1/1) ... [2021-05-02 19:29:24,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d98d646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24, skipping insertion in model container [2021-05-02 19:29:24,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:29:24" (1/1) ... [2021-05-02 19:29:24,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:29:24,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:29:24,724 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c[597,610] [2021-05-02 19:29:24,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:29:24,751 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:29:24,761 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound10.c[597,610] [2021-05-02 19:29:24,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:29:24,790 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:29:24,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24 WrapperNode [2021-05-02 19:29:24,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:29:24,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:29:24,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:29:24,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:29:24,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24" (1/1) ... [2021-05-02 19:29:24,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24" (1/1) ... [2021-05-02 19:29:24,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24" (1/1) ... [2021-05-02 19:29:24,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24" (1/1) ... [2021-05-02 19:29:24,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24" (1/1) ... [2021-05-02 19:29:24,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24" (1/1) ... [2021-05-02 19:29:24,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24" (1/1) ... [2021-05-02 19:29:24,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:29:24,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:29:24,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:29:24,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:29:24,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:29:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:29:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:29:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:29:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:29:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:29:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:29:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:29:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:29:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:29:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:29:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:29:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:29:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:29:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:29:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:29:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:29:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:29:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:29:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:29:24,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:29:25,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:29:25,146 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:29:25,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:25 BoogieIcfgContainer [2021-05-02 19:29:25,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:29:25,148 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:29:25,148 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:29:25,149 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:29:25,150 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:25" (1/1) ... [2021-05-02 19:29:25,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:29:25 BasicIcfg [2021-05-02 19:29:25,161 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:29:25,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:29:25,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:29:25,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:29:25,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:29:24" (1/4) ... [2021-05-02 19:29:25,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bc57f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:29:25, skipping insertion in model container [2021-05-02 19:29:25,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:29:24" (2/4) ... [2021-05-02 19:29:25,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bc57f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:29:25, skipping insertion in model container [2021-05-02 19:29:25,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:29:25" (3/4) ... [2021-05-02 19:29:25,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bc57f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:29:25, skipping insertion in model container [2021-05-02 19:29:25,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:29:25" (4/4) ... [2021-05-02 19:29:25,168 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound10.cJordan [2021-05-02 19:29:25,171 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:29:25,174 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:29:25,200 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:29:25,213 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:29:25,213 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:29:25,213 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:29:25,214 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:29:25,214 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:29:25,214 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:29:25,214 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:29:25,214 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:29:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:29:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:29:25,232 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:25,232 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:25,232 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:25,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:25,236 INFO L82 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2021-05-02 19:29:25,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:25,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850305439] [2021-05-02 19:29:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:25,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:29:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:25,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:25,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850305439] [2021-05-02 19:29:25,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850305439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:29:25,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:29:25,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:29:25,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481443862] [2021-05-02 19:29:25,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:29:25,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:29:25,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:29:25,434 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:25,477 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 19:29:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:29:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:29:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:25,484 INFO L225 Difference]: With dead ends: 26 [2021-05-02 19:29:25,484 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 19:29:25,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:29:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 19:29:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-02 19:29:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 19:29:25,506 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 19:29:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:25,506 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 19:29:25,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 19:29:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:29:25,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:25,507 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:25,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:29:25,507 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:25,508 INFO L82 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2021-05-02 19:29:25,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:25,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507507406] [2021-05-02 19:29:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:25,520 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:25,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402838840] [2021-05-02 19:29:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:25,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 19:29:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:25,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:25,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507507406] [2021-05-02 19:29:25,723 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:25,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402838840] [2021-05-02 19:29:25,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402838840] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:29:25,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:29:25,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:29:25,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407349436] [2021-05-02 19:29:25,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:29:25,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:29:25,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:29:25,728 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:25,826 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-05-02 19:29:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:29:25,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:29:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:25,829 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:29:25,829 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 19:29:25,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:29:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 19:29:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 19:29:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 19:29:25,834 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-05-02 19:29:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:25,834 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 19:29:25,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:29:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 19:29:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:29:25,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:25,837 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:26,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:29:26,043 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:26,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:26,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2021-05-02 19:29:26,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:26,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028612539] [2021-05-02 19:29:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:26,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:26,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613720939] [2021-05-02 19:29:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:26,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:29:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:26,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:26,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:26,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028612539] [2021-05-02 19:29:26,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:26,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613720939] [2021-05-02 19:29:26,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613720939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:26,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:26,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:29:26,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838904606] [2021-05-02 19:29:26,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:29:26,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:26,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:29:26,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:29:26,230 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:26,375 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-05-02 19:29:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:29:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-02 19:29:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:26,378 INFO L225 Difference]: With dead ends: 42 [2021-05-02 19:29:26,378 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 19:29:26,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:29:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 19:29:26,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 19:29:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:29:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 19:29:26,389 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-05-02 19:29:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:26,389 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 19:29:26,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 19:29:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:29:26,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:26,390 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:26,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:26,605 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:26,606 INFO L82 PathProgramCache]: Analyzing trace with hash -642681530, now seen corresponding path program 1 times [2021-05-02 19:29:26,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:26,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951951701] [2021-05-02 19:29:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:26,626 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:26,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932377902] [2021-05-02 19:29:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:26,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:29:26,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:26,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:26,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:26,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:26,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:26,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951951701] [2021-05-02 19:29:26,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:26,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932377902] [2021-05-02 19:29:26,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932377902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:26,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:26,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:29:26,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991490604] [2021-05-02 19:29:26,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:29:26,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:26,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:29:26,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:29:26,871 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:27,020 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-02 19:29:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:29:27,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-02 19:29:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:27,023 INFO L225 Difference]: With dead ends: 51 [2021-05-02 19:29:27,023 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 19:29:27,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:29:27,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 19:29:27,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-05-02 19:29:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:29:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 19:29:27,041 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2021-05-02 19:29:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:27,041 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 19:29:27,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 19:29:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:29:27,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:27,043 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:27,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:27,259 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:27,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2021-05-02 19:29:27,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:27,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212476599] [2021-05-02 19:29:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:27,267 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:27,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577202002] [2021-05-02 19:29:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:27,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:29:27,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:27,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:29:27,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:27,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212476599] [2021-05-02 19:29:27,407 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:27,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577202002] [2021-05-02 19:29:27,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577202002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:27,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:27,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 19:29:27,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782602790] [2021-05-02 19:29:27,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:29:27,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:27,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:29:27,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:29:27,408 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:27,432 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-05-02 19:29:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:29:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-05-02 19:29:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:27,434 INFO L225 Difference]: With dead ends: 46 [2021-05-02 19:29:27,434 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 19:29:27,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:29:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 19:29:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 19:29:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:29:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 19:29:27,437 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2021-05-02 19:29:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:27,437 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 19:29:27,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:29:27,438 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 19:29:27,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 19:29:27,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:27,438 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:27,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:27,649 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:27,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2021-05-02 19:29:27,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:27,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610954357] [2021-05-02 19:29:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:27,656 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:27,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624570843] [2021-05-02 19:29:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:29:27,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 19:29:27,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:27,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:29:27,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:27,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610954357] [2021-05-02 19:29:27,931 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:27,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624570843] [2021-05-02 19:29:27,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624570843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:27,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:27,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:29:27,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518196716] [2021-05-02 19:29:27,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:29:27,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:27,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:29:27,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:29:27,933 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:28,113 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-05-02 19:29:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:29:28,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-05-02 19:29:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:28,115 INFO L225 Difference]: With dead ends: 55 [2021-05-02 19:29:28,116 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 19:29:28,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:29:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 19:29:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-05-02 19:29:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:29:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 19:29:28,118 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-05-02 19:29:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:28,119 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 19:29:28,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:28,119 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 19:29:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:29:28,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:29:28,119 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:29:28,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:29:28,325 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:29:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:29:28,325 INFO L82 PathProgramCache]: Analyzing trace with hash 398537738, now seen corresponding path program 2 times [2021-05-02 19:29:28,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:29:28,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906846983] [2021-05-02 19:29:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:29:28,334 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:29:28,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752185754] [2021-05-02 19:29:28,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:28,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:29:28,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:29:28,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 19:29:28,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:29:28,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:28,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:28,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:28,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:28,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:28,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:28,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:28,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:28,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:28,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:29:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:29:28,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:29:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906846983] [2021-05-02 19:29:28,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:29:28,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752185754] [2021-05-02 19:29:28,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752185754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:29:28,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:29:28,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:29:28,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446432490] [2021-05-02 19:29:28,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:29:28,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:29:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:29:28,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:29:28,722 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:29:29,690 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-05-02 19:29:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:29:29,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-05-02 19:29:29,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:29:29,691 INFO L225 Difference]: With dead ends: 52 [2021-05-02 19:29:29,691 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:29:29,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:29:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:29:29,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:29:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:29:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:29:29,691 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-02 19:29:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:29:29,692 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:29:29,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:29:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:29:29,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:29:29,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:29:29,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:29:29 BasicIcfg [2021-05-02 19:29:29,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:29:29,909 INFO L168 Benchmark]: Toolchain (without parser) took 5332.85 ms. Allocated memory was 182.5 MB in the beginning and 220.2 MB in the end (delta: 37.7 MB). Free memory was 149.8 MB in the beginning and 170.6 MB in the end (delta: -20.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:29,909 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 182.5 MB. Free memory is still 166.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:29:29,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.00 ms. Allocated memory is still 182.5 MB. Free memory was 149.6 MB in the beginning and 139.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:29,909 INFO L168 Benchmark]: Boogie Preprocessor took 72.57 ms. Allocated memory is still 182.5 MB. Free memory was 139.6 MB in the beginning and 165.8 MB in the end (delta: -26.3 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:29,909 INFO L168 Benchmark]: RCFGBuilder took 282.49 ms. Allocated memory is still 182.5 MB. Free memory was 165.8 MB in the beginning and 150.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:29,909 INFO L168 Benchmark]: IcfgTransformer took 13.53 ms. Allocated memory is still 182.5 MB. Free memory was 150.6 MB in the beginning and 149.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:29,909 INFO L168 Benchmark]: TraceAbstraction took 4745.65 ms. Allocated memory was 182.5 MB in the beginning and 220.2 MB in the end (delta: 37.7 MB). Free memory was 148.5 MB in the beginning and 170.6 MB in the end (delta: -22.1 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:29:29,909 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 182.5 MB. Free memory is still 166.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 213.00 ms. Allocated memory is still 182.5 MB. Free memory was 149.6 MB in the beginning and 139.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.57 ms. Allocated memory is still 182.5 MB. Free memory was 139.6 MB in the beginning and 165.8 MB in the end (delta: -26.3 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 282.49 ms. Allocated memory is still 182.5 MB. Free memory was 165.8 MB in the beginning and 150.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.53 ms. Allocated memory is still 182.5 MB. Free memory was 150.6 MB in the beginning and 149.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4745.65 ms. Allocated memory was 182.5 MB in the beginning and 220.2 MB in the end (delta: 37.7 MB). Free memory was 148.5 MB in the beginning and 170.6 MB in the end (delta: -22.1 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4693.7ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 17.9ms, AutomataDifference: 1647.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 93 SDslu, 588 SDs, 0 SdLazy, 853 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1126.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 810.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=4, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 47.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 55.8ms SsaConstructionTime, 151.0ms SatisfiabilityAnalysisTime, 1180.7ms InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 1075 SizeOfPredicates, 37 NumberOfNonLiveVariables, 842 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 16/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...