./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard-u.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c39b3df4f6496260f36de23bbe8b53b10d3f4267 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard-u.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c39b3df4f6496260f36de23bbe8b53b10d3f4267 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 01:09:45,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 01:09:45,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 01:09:45,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 01:09:45,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 01:09:45,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 01:09:45,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 01:09:45,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 01:09:45,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 01:09:45,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 01:09:45,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 01:09:45,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 01:09:45,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 01:09:45,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 01:09:45,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 01:09:45,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 01:09:45,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 01:09:45,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 01:09:45,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 01:09:45,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 01:09:45,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 01:09:45,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 01:09:45,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 01:09:45,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 01:09:45,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 01:09:45,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 01:09:45,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 01:09:45,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 01:09:45,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 01:09:45,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 01:09:45,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 01:09:45,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 01:09:45,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 01:09:45,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 01:09:45,830 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 01:09:45,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 01:09:45,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 01:09:45,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 01:09:45,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 01:09:45,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 01:09:45,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 01:09:45,837 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-03 01:09:45,888 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 01:09:45,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 01:09:45,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 01:09:45,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 01:09:45,893 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 01:09:45,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 01:09:45,893 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 01:09:45,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 01:09:45,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 01:09:45,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 01:09:45,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 01:09:45,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 01:09:45,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 01:09:45,896 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 01:09:45,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 01:09:45,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 01:09:45,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 01:09:45,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 01:09:45,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 01:09:45,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 01:09:45,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:09:45,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 01:09:45,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 01:09:45,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 01:09:45,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-03 01:09:45,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 01:09:45,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 01:09:45,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 01:09:45,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b3df4f6496260f36de23bbe8b53b10d3f4267 [2020-12-03 01:09:46,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 01:09:46,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 01:09:46,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 01:09:46,456 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 01:09:46,457 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 01:09:46,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard-u.c [2020-12-03 01:09:46,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3ea2531c/f441cd713ee1421d837dd5cdbf48f7f2/FLAG058601a11 [2020-12-03 01:09:47,170 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 01:09:47,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-u.c [2020-12-03 01:09:47,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3ea2531c/f441cd713ee1421d837dd5cdbf48f7f2/FLAG058601a11 [2020-12-03 01:09:47,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3ea2531c/f441cd713ee1421d837dd5cdbf48f7f2 [2020-12-03 01:09:47,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 01:09:47,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 01:09:47,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 01:09:47,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 01:09:47,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 01:09:47,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a47014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47, skipping insertion in model container [2020-12-03 01:09:47,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 01:09:47,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 01:09:47,757 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-u.c[537,550] [2020-12-03 01:09:47,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:09:47,786 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 01:09:47,801 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-u.c[537,550] [2020-12-03 01:09:47,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:09:47,829 INFO L208 MainTranslator]: Completed translation [2020-12-03 01:09:47,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47 WrapperNode [2020-12-03 01:09:47,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 01:09:47,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 01:09:47,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 01:09:47,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 01:09:47,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 01:09:47,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 01:09:47,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 01:09:47,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 01:09:47,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,905 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (1/1) ... [2020-12-03 01:09:47,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 01:09:47,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 01:09:47,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 01:09:47,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 01:09:47,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (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 [2020-12-03 01:09:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 01:09:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 01:09:48,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 01:09:48,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 01:09:48,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 01:09:48,614 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-03 01:09:48,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:09:48 BoogieIcfgContainer [2020-12-03 01:09:48,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 01:09:48,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 01:09:48,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 01:09:48,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 01:09:48,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:09:47" (1/3) ... [2020-12-03 01:09:48,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a143d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:09:48, skipping insertion in model container [2020-12-03 01:09:48,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:09:47" (2/3) ... [2020-12-03 01:09:48,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a143d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:09:48, skipping insertion in model container [2020-12-03 01:09:48,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:09:48" (3/3) ... [2020-12-03 01:09:48,625 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.c [2020-12-03 01:09:48,651 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 01:09:48,655 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-03 01:09:48,669 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-03 01:09:48,700 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 01:09:48,700 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 01:09:48,701 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 01:09:48,701 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 01:09:48,701 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 01:09:48,701 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 01:09:48,701 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 01:09:48,701 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 01:09:48,720 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-12-03 01:09:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 01:09:48,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:48,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:09:48,728 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-03 01:09:48,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:09:48,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956206934] [2020-12-03 01:09:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:09:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:09:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:09:48,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956206934] [2020-12-03 01:09:48,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:09:48,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 01:09:48,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163479332] [2020-12-03 01:09:48,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 01:09:48,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:09:48,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 01:09:48,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:09:48,947 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-12-03 01:09:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:09:48,971 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2020-12-03 01:09:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 01:09:48,973 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-03 01:09:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:09:48,983 INFO L225 Difference]: With dead ends: 75 [2020-12-03 01:09:48,983 INFO L226 Difference]: Without dead ends: 35 [2020-12-03 01:09:48,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:09:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-03 01:09:49,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-03 01:09:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:09:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-03 01:09:49,037 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 7 [2020-12-03 01:09:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:09:49,038 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-03 01:09:49,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 01:09:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-03 01:09:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 01:09:49,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:49,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:09:49,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 01:09:49,040 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-03 01:09:49,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:09:49,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029372639] [2020-12-03 01:09:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:09:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:09:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:09:49,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029372639] [2020-12-03 01:09:49,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:09:49,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:09:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217340647] [2020-12-03 01:09:49,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:09:49,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:09:49,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:09:49,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:09:49,143 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 4 states. [2020-12-03 01:09:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:09:49,271 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-12-03 01:09:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:09:49,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-03 01:09:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:09:49,274 INFO L225 Difference]: With dead ends: 54 [2020-12-03 01:09:49,274 INFO L226 Difference]: Without dead ends: 52 [2020-12-03 01:09:49,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:09:49,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-03 01:09:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2020-12-03 01:09:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-03 01:09:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-03 01:09:49,284 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 7 [2020-12-03 01:09:49,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:09:49,285 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-03 01:09:49,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:09:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-03 01:09:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 01:09:49,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:49,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:09:49,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 01:09:49,287 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:49,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:49,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1186787538, now seen corresponding path program 1 times [2020-12-03 01:09:49,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:09:49,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623790227] [2020-12-03 01:09:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:09:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:09:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:09:49,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623790227] [2020-12-03 01:09:49,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:09:49,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:09:49,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266969192] [2020-12-03 01:09:49,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:09:49,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:09:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:09:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:09:49,378 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 4 states. [2020-12-03 01:09:49,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:09:49,515 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-03 01:09:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:09:49,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-03 01:09:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:09:49,517 INFO L225 Difference]: With dead ends: 52 [2020-12-03 01:09:49,517 INFO L226 Difference]: Without dead ends: 50 [2020-12-03 01:09:49,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:09:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-03 01:09:49,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2020-12-03 01:09:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-03 01:09:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-03 01:09:49,526 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 9 [2020-12-03 01:09:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:09:49,526 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-03 01:09:49,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:09:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-03 01:09:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 01:09:49,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:49,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:09:49,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 01:09:49,528 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:49,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1958320619, now seen corresponding path program 1 times [2020-12-03 01:09:49,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:09:49,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537476626] [2020-12-03 01:09:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:09:49,559 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:09:49,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889057271] [2020-12-03 01:09:49,560 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 [2020-12-03 01:09:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:09:49,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-03 01:09:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:09:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:09:49,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537476626] [2020-12-03 01:09:49,904 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:09:49,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889057271] [2020-12-03 01:09:49,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:09:49,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-03 01:09:49,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743451950] [2020-12-03 01:09:49,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 01:09:49,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:09:49,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 01:09:49,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:09:49,912 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 6 states. [2020-12-03 01:09:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:09:50,386 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-12-03 01:09:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 01:09:50,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-03 01:09:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:09:50,389 INFO L225 Difference]: With dead ends: 72 [2020-12-03 01:09:50,389 INFO L226 Difference]: Without dead ends: 50 [2020-12-03 01:09:50,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-03 01:09:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-03 01:09:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-12-03 01:09:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-03 01:09:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-03 01:09:50,418 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 11 [2020-12-03 01:09:50,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:09:50,418 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-03 01:09:50,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 01:09:50,418 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-03 01:09:50,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 01:09:50,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:50,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:09:50,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:09:50,636 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:50,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:50,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1783857492, now seen corresponding path program 1 times [2020-12-03 01:09:50,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:09:50,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110410244] [2020-12-03 01:09:50,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:09:50,655 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:09:50,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050216085] [2020-12-03 01:09:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-03 01:09:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:09:50,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-03 01:09:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:09:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:09:50,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110410244] [2020-12-03 01:09:50,948 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:09:50,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050216085] [2020-12-03 01:09:50,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:09:50,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 01:09:50,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501363508] [2020-12-03 01:09:50,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 01:09:50,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:09:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 01:09:50,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-03 01:09:50,952 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2020-12-03 01:09:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:09:53,481 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-03 01:09:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:09:53,482 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-03 01:09:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:09:53,483 INFO L225 Difference]: With dead ends: 52 [2020-12-03 01:09:53,483 INFO L226 Difference]: Without dead ends: 50 [2020-12-03 01:09:53,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:09:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-03 01:09:53,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-12-03 01:09:53,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-03 01:09:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-12-03 01:09:53,491 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 14 [2020-12-03 01:09:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:09:53,492 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-12-03 01:09:53,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 01:09:53,492 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-12-03 01:09:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 01:09:53,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:53,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:09:53,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:09:53,710 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:53,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:53,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1907209632, now seen corresponding path program 1 times [2020-12-03 01:09:53,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:09:53,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987747270] [2020-12-03 01:09:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:09:53,728 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:09:53,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413563658] [2020-12-03 01:09:53,729 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 [2020-12-03 01:09:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:09:53,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-03 01:09:53,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:09:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:09:54,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987747270] [2020-12-03 01:09:54,002 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:09:54,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413563658] [2020-12-03 01:09:54,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:09:54,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-03 01:09:54,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103276945] [2020-12-03 01:09:54,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 01:09:54,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:09:54,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 01:09:54,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-03 01:09:54,006 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 7 states. [2020-12-03 01:09:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:09:56,528 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-12-03 01:09:56,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 01:09:56,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-03 01:09:56,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:09:56,530 INFO L225 Difference]: With dead ends: 74 [2020-12-03 01:09:56,530 INFO L226 Difference]: Without dead ends: 64 [2020-12-03 01:09:56,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-03 01:09:56,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-03 01:09:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-12-03 01:09:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-03 01:09:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-12-03 01:09:56,541 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 18 [2020-12-03 01:09:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:09:56,541 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-12-03 01:09:56,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 01:09:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-12-03 01:09:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-03 01:09:56,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:56,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:09:56,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:09:56,747 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1434995734, now seen corresponding path program 1 times [2020-12-03 01:09:56,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:09:56,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041959166] [2020-12-03 01:09:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:09:56,769 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:09:56,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776460627] [2020-12-03 01:09:56,770 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 [2020-12-03 01:09:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:09:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-03 01:09:56,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:09:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:09:57,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041959166] [2020-12-03 01:09:57,009 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:09:57,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776460627] [2020-12-03 01:09:57,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:09:57,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 01:09:57,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242699403] [2020-12-03 01:09:57,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 01:09:57,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:09:57,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 01:09:57,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-03 01:09:57,012 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 7 states. [2020-12-03 01:09:57,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:09:57,410 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-03 01:09:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 01:09:57,410 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-03 01:09:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:09:57,411 INFO L225 Difference]: With dead ends: 59 [2020-12-03 01:09:57,411 INFO L226 Difference]: Without dead ends: 50 [2020-12-03 01:09:57,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:09:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-03 01:09:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-03 01:09:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-03 01:09:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-12-03 01:09:57,419 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 19 [2020-12-03 01:09:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:09:57,420 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-12-03 01:09:57,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 01:09:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-12-03 01:09:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-03 01:09:57,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:57,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:09:57,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:09:57,635 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:57,636 INFO L82 PathProgramCache]: Analyzing trace with hash -435290303, now seen corresponding path program 1 times [2020-12-03 01:09:57,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:09:57,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90215481] [2020-12-03 01:09:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:09:57,652 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:09:57,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254221020] [2020-12-03 01:09:57,653 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 [2020-12-03 01:09:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:09:57,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-03 01:09:57,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:09:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:09:57,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90215481] [2020-12-03 01:09:57,987 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:09:57,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254221020] [2020-12-03 01:09:57,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:09:57,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-03 01:09:57,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632370549] [2020-12-03 01:09:57,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:09:57,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:09:57,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:09:57,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:09:57,992 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 8 states. [2020-12-03 01:09:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:09:58,549 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-12-03 01:09:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 01:09:58,549 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-03 01:09:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:09:58,550 INFO L225 Difference]: With dead ends: 68 [2020-12-03 01:09:58,550 INFO L226 Difference]: Without dead ends: 64 [2020-12-03 01:09:58,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-12-03 01:09:58,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-03 01:09:58,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-12-03 01:09:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-03 01:09:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-12-03 01:09:58,572 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 21 [2020-12-03 01:09:58,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:09:58,572 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-12-03 01:09:58,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:09:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-12-03 01:09:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-03 01:09:58,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:09:58,576 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:09:58,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:09:58,791 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:09:58,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:09:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1701996188, now seen corresponding path program 1 times [2020-12-03 01:09:58,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:09:58,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9457465] [2020-12-03 01:09:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:09:58,820 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:09:58,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337259903] [2020-12-03 01:09:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-03 01:09:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:09:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 01:09:58,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:09:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-03 01:09:58,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9457465] [2020-12-03 01:09:58,967 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:09:58,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337259903] [2020-12-03 01:09:58,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:09:58,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 01:09:58,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940430488] [2020-12-03 01:09:58,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 01:09:58,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:09:58,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 01:09:58,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:09:58,970 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 5 states. [2020-12-03 01:10:03,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:03,987 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-12-03 01:10:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 01:10:03,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-03 01:10:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:03,988 INFO L225 Difference]: With dead ends: 64 [2020-12-03 01:10:03,989 INFO L226 Difference]: Without dead ends: 62 [2020-12-03 01:10:03,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 01:10:03,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-03 01:10:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-03 01:10:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-03 01:10:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-03 01:10:03,999 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 23 [2020-12-03 01:10:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:03,999 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-03 01:10:04,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 01:10:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-03 01:10:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-03 01:10:04,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:04,001 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:04,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:04,215 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1115495499, now seen corresponding path program 2 times [2020-12-03 01:10:04,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:04,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610447011] [2020-12-03 01:10:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:04,242 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:04,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004868861] [2020-12-03 01:10:04,243 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:04,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-03 01:10:04,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 01:10:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-03 01:10:04,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:10:04,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610447011] [2020-12-03 01:10:04,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:10:04,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004868861] [2020-12-03 01:10:04,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-03 01:10:04,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-03 01:10:04,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230870929] [2020-12-03 01:10:04,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-03 01:10:04,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-03 01:10:04,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-03 01:10:04,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-03 01:10:04,852 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-12-03 01:10:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:10:05,902 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-12-03 01:10:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-03 01:10:05,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-03 01:10:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:10:05,906 INFO L225 Difference]: With dead ends: 86 [2020-12-03 01:10:05,906 INFO L226 Difference]: Without dead ends: 78 [2020-12-03 01:10:05,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-12-03 01:10:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-03 01:10:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2020-12-03 01:10:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-03 01:10:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2020-12-03 01:10:05,917 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 25 [2020-12-03 01:10:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:10:05,924 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2020-12-03 01:10:05,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-03 01:10:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2020-12-03 01:10:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-03 01:10:05,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:10:05,926 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:10:06,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-03 01:10:06,139 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:10:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:10:06,140 INFO L82 PathProgramCache]: Analyzing trace with hash 115055918, now seen corresponding path program 1 times [2020-12-03 01:10:06,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 01:10:06,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357379513] [2020-12-03 01:10:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 01:10:06,153 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-03 01:10:06,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290025247] [2020-12-03 01:10:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 01:10:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:10:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-03 01:10:07,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:10:07,490 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:07,533 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-03 01:10:07,544 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-03 01:10:07,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-03 01:10:07,959 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-03 01:10:08,459 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:10,260 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:12,348 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:14,361 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:16,525 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:17,879 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:18,944 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:19,910 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:21,295 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:22,621 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:23,910 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:24,905 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:25,789 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:29,438 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:34,043 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:38,974 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:46,113 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:10:58,167 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:17,387 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-03 01:11:20,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357379513] [2020-12-03 01:11:20,333 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 01:11:20,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290025247] [2020-12-03 01:11:20,334 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-03 01:11:20,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:20,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-03 01:11:20,334 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-03 01:11:20,334 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 01:11:20,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-03 01:11:20,563 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-03 01:11:20,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:11:20 BoogieIcfgContainer [2020-12-03 01:11:20,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 01:11:20,564 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 01:11:20,564 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 01:11:20,565 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 01:11:20,565 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:09:48" (3/4) ... [2020-12-03 01:11:20,569 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 01:11:20,569 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 01:11:20,571 INFO L168 Benchmark]: Toolchain (without parser) took 93026.03 ms. Allocated memory was 44.0 MB in the beginning and 218.1 MB in the end (delta: 174.1 MB). Free memory was 21.1 MB in the beginning and 125.9 MB in the end (delta: -104.8 MB). Peak memory consumption was 71.7 MB. Max. memory is 16.1 GB. [2020-12-03 01:11:20,572 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 35.7 MB. Free memory was 22.1 MB in the beginning and 22.1 MB in the end (delta: 45.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:11:20,573 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.96 ms. Allocated memory is still 44.0 MB. Free memory was 20.9 MB in the beginning and 20.3 MB in the end (delta: 647.1 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-12-03 01:11:20,574 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.20 ms. Allocated memory is still 44.0 MB. Free memory was 20.3 MB in the beginning and 28.5 MB in the end (delta: -8.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2020-12-03 01:11:20,574 INFO L168 Benchmark]: Boogie Preprocessor took 26.97 ms. Allocated memory is still 44.0 MB. Free memory was 28.5 MB in the beginning and 27.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:11:20,575 INFO L168 Benchmark]: RCFGBuilder took 706.96 ms. Allocated memory is still 44.0 MB. Free memory was 27.2 MB in the beginning and 18.5 MB in the end (delta: 8.7 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2020-12-03 01:11:20,576 INFO L168 Benchmark]: TraceAbstraction took 91945.99 ms. Allocated memory was 44.0 MB in the beginning and 218.1 MB in the end (delta: 174.1 MB). Free memory was 18.2 MB in the beginning and 126.9 MB in the end (delta: -108.7 MB). Peak memory consumption was 123.3 MB. Max. memory is 16.1 GB. [2020-12-03 01:11:20,576 INFO L168 Benchmark]: Witness Printer took 5.10 ms. Allocated memory is still 218.1 MB. Free memory was 126.9 MB in the beginning and 125.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:11:20,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 35.7 MB. Free memory was 22.1 MB in the beginning and 22.1 MB in the end (delta: 45.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.96 ms. Allocated memory is still 44.0 MB. Free memory was 20.9 MB in the beginning and 20.3 MB in the end (delta: 647.1 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.20 ms. Allocated memory is still 44.0 MB. Free memory was 20.3 MB in the beginning and 28.5 MB in the end (delta: -8.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.97 ms. Allocated memory is still 44.0 MB. Free memory was 28.5 MB in the beginning and 27.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 706.96 ms. Allocated memory is still 44.0 MB. Free memory was 27.2 MB in the beginning and 18.5 MB in the end (delta: 8.7 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 91945.99 ms. Allocated memory was 44.0 MB in the beginning and 218.1 MB in the end (delta: 174.1 MB). Free memory was 18.2 MB in the beginning and 126.9 MB in the end (delta: -108.7 MB). Peak memory consumption was 123.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.10 ms. Allocated memory is still 218.1 MB. Free memory was 126.9 MB in the beginning and 125.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] unsigned int A, B; [L24] unsigned int r, d, p, q; [L25] A = __VERIFIER_nondet_uint() [L26] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p [L34] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L38] COND TRUE !(r >= d) [L44] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p [L44] COND TRUE 1 [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 39 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 91.8s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 12.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 250 SDtfs, 714 SDslu, 398 SDs, 0 SdLazy, 584 SolverSat, 138 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 10.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 70 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 25299 SizeOfPredicates, 52 NumberOfNonLiveVariables, 596 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 7/39 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-03 01:11:23,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 01:11:23,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 01:11:23,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 01:11:23,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 01:11:23,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 01:11:23,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 01:11:23,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 01:11:23,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 01:11:23,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 01:11:23,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 01:11:23,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 01:11:23,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 01:11:23,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 01:11:23,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 01:11:23,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 01:11:23,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 01:11:23,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 01:11:23,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 01:11:23,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 01:11:23,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 01:11:23,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 01:11:23,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 01:11:23,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 01:11:23,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 01:11:23,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 01:11:23,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 01:11:23,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 01:11:23,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 01:11:23,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 01:11:23,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 01:11:23,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 01:11:23,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 01:11:23,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 01:11:23,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 01:11:23,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 01:11:23,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 01:11:23,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 01:11:23,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 01:11:23,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 01:11:23,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 01:11:23,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-03 01:11:23,376 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 01:11:23,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 01:11:23,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 01:11:23,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 01:11:23,380 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 01:11:23,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 01:11:23,381 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 01:11:23,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 01:11:23,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 01:11:23,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 01:11:23,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 01:11:23,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 01:11:23,383 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 01:11:23,384 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 01:11:23,384 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 01:11:23,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 01:11:23,384 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 01:11:23,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 01:11:23,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 01:11:23,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 01:11:23,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 01:11:23,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 01:11:23,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 01:11:23,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 01:11:23,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 01:11:23,387 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-03 01:11:23,387 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 01:11:23,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 01:11:23,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 01:11:23,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 01:11:23,388 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c39b3df4f6496260f36de23bbe8b53b10d3f4267 [2020-12-03 01:11:23,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 01:11:23,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 01:11:23,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 01:11:23,881 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 01:11:23,882 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 01:11:23,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard-u.c [2020-12-03 01:11:23,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c62c1d63/04eb27603d714b78978d262ff1b1e609/FLAGbfe8dd7e0 [2020-12-03 01:11:24,676 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 01:11:24,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-u.c [2020-12-03 01:11:24,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c62c1d63/04eb27603d714b78978d262ff1b1e609/FLAGbfe8dd7e0 [2020-12-03 01:11:25,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c62c1d63/04eb27603d714b78978d262ff1b1e609 [2020-12-03 01:11:25,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 01:11:25,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 01:11:25,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 01:11:25,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 01:11:25,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 01:11:25,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30674686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25, skipping insertion in model container [2020-12-03 01:11:25,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 01:11:25,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 01:11:25,268 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-u.c[537,550] [2020-12-03 01:11:25,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:11:25,299 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 01:11:25,314 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-u.c[537,550] [2020-12-03 01:11:25,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 01:11:25,340 INFO L208 MainTranslator]: Completed translation [2020-12-03 01:11:25,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25 WrapperNode [2020-12-03 01:11:25,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 01:11:25,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 01:11:25,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 01:11:25,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 01:11:25,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 01:11:25,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 01:11:25,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 01:11:25,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 01:11:25,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (1/1) ... [2020-12-03 01:11:25,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 01:11:25,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 01:11:25,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 01:11:25,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 01:11:25,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (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 [2020-12-03 01:11:25,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 01:11:25,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 01:11:25,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 01:11:25,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 01:11:26,058 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 01:11:26,059 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2020-12-03 01:11:26,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:11:26 BoogieIcfgContainer [2020-12-03 01:11:26,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 01:11:26,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 01:11:26,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 01:11:26,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 01:11:26,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 01:11:25" (1/3) ... [2020-12-03 01:11:26,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56289bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:11:26, skipping insertion in model container [2020-12-03 01:11:26,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 01:11:25" (2/3) ... [2020-12-03 01:11:26,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56289bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 01:11:26, skipping insertion in model container [2020-12-03 01:11:26,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:11:26" (3/3) ... [2020-12-03 01:11:26,089 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.c [2020-12-03 01:11:26,127 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 01:11:26,134 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-03 01:11:26,164 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-03 01:11:26,226 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 01:11:26,226 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 01:11:26,226 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 01:11:26,226 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 01:11:26,227 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 01:11:26,227 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 01:11:26,227 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 01:11:26,227 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 01:11:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-12-03 01:11:26,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 01:11:26,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:26,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:26,262 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:26,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:26,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2020-12-03 01:11:26,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:26,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721844855] [2020-12-03 01:11:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-03 01:11:26,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:26,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:26,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721844855] [2020-12-03 01:11:26,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:26,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 01:11:26,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204915201] [2020-12-03 01:11:26,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-03 01:11:26,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:26,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-03 01:11:26,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:11:26,457 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-12-03 01:11:26,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:26,490 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2020-12-03 01:11:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-03 01:11:26,492 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-03 01:11:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:26,512 INFO L225 Difference]: With dead ends: 75 [2020-12-03 01:11:26,513 INFO L226 Difference]: Without dead ends: 35 [2020-12-03 01:11:26,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-03 01:11:26,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-03 01:11:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-03 01:11:26,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-03 01:11:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-03 01:11:26,569 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 7 [2020-12-03 01:11:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:26,570 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-03 01:11:26,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-03 01:11:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-03 01:11:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 01:11:26,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:26,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:26,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 01:11:26,774 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:26,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2020-12-03 01:11:26,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:26,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381263003] [2020-12-03 01:11:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:26,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 01:11:26,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:26,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:26,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381263003] [2020-12-03 01:11:26,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:26,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:11:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693157121] [2020-12-03 01:11:26,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:26,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:26,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:26,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:26,880 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 4 states. [2020-12-03 01:11:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:27,047 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-12-03 01:11:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:11:27,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-03 01:11:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:27,051 INFO L225 Difference]: With dead ends: 53 [2020-12-03 01:11:27,052 INFO L226 Difference]: Without dead ends: 51 [2020-12-03 01:11:27,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-03 01:11:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2020-12-03 01:11:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-03 01:11:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-03 01:11:27,062 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 7 [2020-12-03 01:11:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:27,062 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-03 01:11:27,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-03 01:11:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 01:11:27,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:27,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:27,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 01:11:27,284 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:27,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:27,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1186787538, now seen corresponding path program 1 times [2020-12-03 01:11:27,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:27,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896560348] [2020-12-03 01:11:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:27,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 01:11:27,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:27,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:27,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896560348] [2020-12-03 01:11:27,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:27,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:11:27,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682093467] [2020-12-03 01:11:27,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:27,363 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 4 states. [2020-12-03 01:11:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:27,541 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-12-03 01:11:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:11:27,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-03 01:11:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:27,544 INFO L225 Difference]: With dead ends: 51 [2020-12-03 01:11:27,544 INFO L226 Difference]: Without dead ends: 49 [2020-12-03 01:11:27,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-03 01:11:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-12-03 01:11:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-03 01:11:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-03 01:11:27,552 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 9 [2020-12-03 01:11:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:27,553 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-03 01:11:27,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-03 01:11:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 01:11:27,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:27,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:27,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-03 01:11:27,768 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:27,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1958320619, now seen corresponding path program 1 times [2020-12-03 01:11:27,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:27,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25991779] [2020-12-03 01:11:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:27,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:11:27,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:27,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:27,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25991779] [2020-12-03 01:11:27,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:27,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:11:27,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738943530] [2020-12-03 01:11:27,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:27,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:27,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:27,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:27,908 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-12-03 01:11:28,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:28,185 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-12-03 01:11:28,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 01:11:28,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-03 01:11:28,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:28,187 INFO L225 Difference]: With dead ends: 72 [2020-12-03 01:11:28,187 INFO L226 Difference]: Without dead ends: 50 [2020-12-03 01:11:28,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:28,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-03 01:11:28,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-12-03 01:11:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-03 01:11:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-03 01:11:28,199 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 11 [2020-12-03 01:11:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:28,199 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-03 01:11:28,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-03 01:11:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 01:11:28,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:28,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:28,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-03 01:11:28,413 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:28,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1783857492, now seen corresponding path program 1 times [2020-12-03 01:11:28,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:28,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869895934] [2020-12-03 01:11:28,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:28,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:11:28,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:28,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 01:11:28,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869895934] [2020-12-03 01:11:28,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 01:11:28,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 01:11:28,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855865739] [2020-12-03 01:11:28,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 01:11:28,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:28,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 01:11:28,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 01:11:28,543 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 4 states. [2020-12-03 01:11:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:28,736 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-12-03 01:11:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 01:11:28,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-03 01:11:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:28,737 INFO L225 Difference]: With dead ends: 63 [2020-12-03 01:11:28,738 INFO L226 Difference]: Without dead ends: 52 [2020-12-03 01:11:28,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 01:11:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-03 01:11:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-12-03 01:11:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-03 01:11:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-03 01:11:28,747 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 14 [2020-12-03 01:11:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:28,747 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-03 01:11:28,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 01:11:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-03 01:11:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 01:11:28,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:28,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:28,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-03 01:11:28,965 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:28,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1907209632, now seen corresponding path program 1 times [2020-12-03 01:11:28,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:28,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183486427] [2020-12-03 01:11:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:29,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 01:11:29,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:29,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:11:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183486427] [2020-12-03 01:11:29,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:11:29,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-03 01:11:29,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077974997] [2020-12-03 01:11:29,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:11:29,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:29,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:11:29,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:11:29,409 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2020-12-03 01:11:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:11:33,013 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2020-12-03 01:11:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-03 01:11:33,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-03 01:11:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:11:33,017 INFO L225 Difference]: With dead ends: 103 [2020-12-03 01:11:33,017 INFO L226 Difference]: Without dead ends: 89 [2020-12-03 01:11:33,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-12-03 01:11:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-03 01:11:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 49. [2020-12-03 01:11:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 01:11:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-12-03 01:11:33,030 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 18 [2020-12-03 01:11:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:11:33,031 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-12-03 01:11:33,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:11:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-12-03 01:11:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-03 01:11:33,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:11:33,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:11:33,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-03 01:11:33,254 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:11:33,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:11:33,255 INFO L82 PathProgramCache]: Analyzing trace with hash 115055918, now seen corresponding path program 1 times [2020-12-03 01:11:33,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:11:33,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561349189] [2020-12-03 01:11:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-03 01:11:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:11:33,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-03 01:11:33,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:11:33,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:11:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:33,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:11:34,488 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-03 01:11:35,087 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-03 01:11:35,779 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-12-03 01:11:36,481 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-12-03 01:11:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:11:36,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561349189] [2020-12-03 01:11:36,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:11:36,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-03 01:11:36,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109875237] [2020-12-03 01:11:36,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-03 01:11:36,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:11:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-03 01:11:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-03 01:11:36,563 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 14 states. [2020-12-03 01:11:38,556 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 01:11:39,589 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-03 01:11:40,582 WARN L197 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:11:42,131 WARN L197 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-03 01:11:45,900 WARN L197 SmtUtils]: Spent 973.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-12-03 01:11:48,522 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-03 01:11:49,910 WARN L197 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-03 01:11:50,456 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 01:11:52,994 WARN L197 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-03 01:11:53,868 WARN L197 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-03 01:11:56,418 WARN L197 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-03 01:12:00,935 WARN L197 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-03 01:12:09,987 WARN L197 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-03 01:12:11,687 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:12:12,435 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-12-03 01:12:13,189 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 01:12:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:14,361 INFO L93 Difference]: Finished difference Result 173 states and 192 transitions. [2020-12-03 01:12:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-03 01:12:14,365 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-12-03 01:12:14,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:14,371 INFO L225 Difference]: With dead ends: 173 [2020-12-03 01:12:14,374 INFO L226 Difference]: Without dead ends: 147 [2020-12-03 01:12:14,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=348, Invalid=984, Unknown=0, NotChecked=0, Total=1332 [2020-12-03 01:12:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-03 01:12:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 88. [2020-12-03 01:12:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-03 01:12:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-12-03 01:12:14,417 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 27 [2020-12-03 01:12:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:14,417 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-12-03 01:12:14,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-03 01:12:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-12-03 01:12:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-03 01:12:14,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:14,420 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:14,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-03 01:12:14,645 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1100255215, now seen corresponding path program 1 times [2020-12-03 01:12:14,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:14,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860674907] [2020-12-03 01:12:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-03 01:12:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 01:12:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:14,901 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:12:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:14,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:12:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:15,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860674907] [2020-12-03 01:12:15,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:12:15,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-03 01:12:15,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373484442] [2020-12-03 01:12:15,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 01:12:15,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:15,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 01:12:15,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:12:15,563 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 12 states. [2020-12-03 01:12:16,512 WARN L197 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-03 01:12:16,943 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-03 01:12:17,456 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-03 01:12:18,124 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-03 01:12:20,827 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:12:21,218 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-12-03 01:12:22,559 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-03 01:12:23,172 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:12:23,700 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:12:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:12:24,205 INFO L93 Difference]: Finished difference Result 154 states and 179 transitions. [2020-12-03 01:12:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-03 01:12:24,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-12-03 01:12:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:12:24,207 INFO L225 Difference]: With dead ends: 154 [2020-12-03 01:12:24,207 INFO L226 Difference]: Without dead ends: 124 [2020-12-03 01:12:24,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2020-12-03 01:12:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-03 01:12:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2020-12-03 01:12:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-03 01:12:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2020-12-03 01:12:24,237 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 29 [2020-12-03 01:12:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:12:24,237 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2020-12-03 01:12:24,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 01:12:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2020-12-03 01:12:24,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-03 01:12:24,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:12:24,243 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:12:24,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-03 01:12:24,456 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:12:24,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:12:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1492250324, now seen corresponding path program 1 times [2020-12-03 01:12:24,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:12:24,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948653706] [2020-12-03 01:12:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-03 01:12:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:12:24,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-03 01:12:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:12:24,988 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-12-03 01:12:25,223 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 01:12:25,662 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-03 01:12:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:26,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:12:26,637 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-03 01:12:26,650 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:12:26,650 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:12:27,944 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-03 01:12:27,957 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:12:27,957 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:12:35,062 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-03 01:12:35,069 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:12:35,069 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:12:38,432 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:12:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:12:38,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948653706] [2020-12-03 01:12:38,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:12:38,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2020-12-03 01:12:38,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388413616] [2020-12-03 01:12:38,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-03 01:12:38,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:12:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-03 01:12:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=304, Unknown=3, NotChecked=0, Total=380 [2020-12-03 01:12:38,473 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand 20 states. [2020-12-03 01:12:41,645 WARN L197 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2020-12-03 01:12:44,000 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2020-12-03 01:12:57,337 WARN L197 SmtUtils]: Spent 13.04 s on a formula simplification. DAG size of input: 32 DAG size of output: 18 [2020-12-03 01:13:01,515 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-12-03 01:13:02,668 WARN L197 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-03 01:13:03,623 WARN L197 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2020-12-03 01:13:04,946 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-03 01:13:05,672 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-12-03 01:13:07,791 WARN L197 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-03 01:13:13,624 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-03 01:13:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:13,625 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2020-12-03 01:13:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-03 01:13:13,625 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-12-03 01:13:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:13,626 INFO L225 Difference]: With dead ends: 104 [2020-12-03 01:13:13,626 INFO L226 Difference]: Without dead ends: 89 [2020-12-03 01:13:13,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=281, Invalid=906, Unknown=3, NotChecked=0, Total=1190 [2020-12-03 01:13:13,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-03 01:13:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-03 01:13:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-03 01:13:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-12-03 01:13:13,643 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 32 [2020-12-03 01:13:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:13,643 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-12-03 01:13:13,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-03 01:13:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-12-03 01:13:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-03 01:13:13,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:13,645 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:13,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-03 01:13:13,846 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:13,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1742842839, now seen corresponding path program 2 times [2020-12-03 01:13:13,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:13:13,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753331287] [2020-12-03 01:13:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-03 01:13:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 01:13:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:13:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:14,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:13:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 01:13:14,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753331287] [2020-12-03 01:13:14,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:13:14,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-03 01:13:14,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134253051] [2020-12-03 01:13:14,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 01:13:14,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:13:14,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 01:13:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-03 01:13:14,157 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 8 states. [2020-12-03 01:13:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:14,386 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2020-12-03 01:13:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 01:13:14,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-12-03 01:13:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:14,388 INFO L225 Difference]: With dead ends: 178 [2020-12-03 01:13:14,388 INFO L226 Difference]: Without dead ends: 144 [2020-12-03 01:13:14,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-03 01:13:14,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-03 01:13:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 132. [2020-12-03 01:13:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-03 01:13:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2020-12-03 01:13:14,412 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 39 [2020-12-03 01:13:14,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:14,413 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2020-12-03 01:13:14,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 01:13:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2020-12-03 01:13:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-03 01:13:14,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:14,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:14,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-03 01:13:14,629 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:14,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:14,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1415019748, now seen corresponding path program 1 times [2020-12-03 01:13:14,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:13:14,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280297462] [2020-12-03 01:13:14,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-12-03 01:13:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 01:13:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-03 01:13:14,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 01:13:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 01:13:15,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 01:13:15,118 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 01:13:15,118 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 01:13:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 01:13:15,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280297462] [2020-12-03 01:13:15,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-03 01:13:15,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-03 01:13:15,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465612378] [2020-12-03 01:13:15,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 01:13:15,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 01:13:15,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 01:13:15,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-03 01:13:15,779 INFO L87 Difference]: Start difference. First operand 132 states and 153 transitions. Second operand 12 states. [2020-12-03 01:13:16,827 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-12-03 01:13:17,664 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2020-12-03 01:13:17,917 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2020-12-03 01:13:18,331 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2020-12-03 01:13:18,756 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-12-03 01:13:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 01:13:18,850 INFO L93 Difference]: Finished difference Result 157 states and 180 transitions. [2020-12-03 01:13:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-03 01:13:18,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-03 01:13:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 01:13:18,855 INFO L225 Difference]: With dead ends: 157 [2020-12-03 01:13:18,855 INFO L226 Difference]: Without dead ends: 110 [2020-12-03 01:13:18,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-12-03 01:13:18,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-03 01:13:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-12-03 01:13:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-03 01:13:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2020-12-03 01:13:18,877 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 40 [2020-12-03 01:13:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 01:13:18,877 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2020-12-03 01:13:18,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 01:13:18,878 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2020-12-03 01:13:18,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-03 01:13:18,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 01:13:18,879 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 01:13:19,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-12-03 01:13:19,087 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 01:13:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 01:13:19,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1808046758, now seen corresponding path program 2 times [2020-12-03 01:13:19,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 01:13:19,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680352087] [2020-12-03 01:13:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-12-03 01:13:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:13:19,700 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:13:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 01:13:19,880 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 01:13:19,965 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-12-03 01:13:19,965 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 01:13:20,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-12-03 01:13:20,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 01:13:20 BoogieIcfgContainer [2020-12-03 01:13:20,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 01:13:20,252 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 01:13:20,252 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 01:13:20,252 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 01:13:20,253 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 01:11:26" (3/4) ... [2020-12-03 01:13:20,254 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 01:13:20,334 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-03 01:13:20,335 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 01:13:20,336 INFO L168 Benchmark]: Toolchain (without parser) took 115305.68 ms. Allocated memory was 39.8 MB in the beginning and 62.9 MB in the end (delta: 23.1 MB). Free memory was 17.1 MB in the beginning and 19.2 MB in the end (delta: -2.0 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:20,337 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 39.8 MB. Free memory was 21.5 MB in the beginning and 21.5 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:13:20,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.92 ms. Allocated memory was 39.8 MB in the beginning and 52.4 MB in the end (delta: 12.6 MB). Free memory was 16.9 MB in the beginning and 28.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:20,338 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.31 ms. Allocated memory is still 52.4 MB. Free memory was 28.6 MB in the beginning and 26.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:20,338 INFO L168 Benchmark]: Boogie Preprocessor took 31.28 ms. Allocated memory is still 52.4 MB. Free memory was 26.9 MB in the beginning and 25.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 01:13:20,339 INFO L168 Benchmark]: RCFGBuilder took 641.30 ms. Allocated memory is still 52.4 MB. Free memory was 25.7 MB in the beginning and 22.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:20,340 INFO L168 Benchmark]: TraceAbstraction took 114187.91 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 22.1 MB in the beginning and 22.7 MB in the end (delta: -676.7 kB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:20,340 INFO L168 Benchmark]: Witness Printer took 83.30 ms. Allocated memory is still 62.9 MB. Free memory was 22.7 MB in the beginning and 19.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-03 01:13:20,344 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 39.8 MB. Free memory was 21.5 MB in the beginning and 21.5 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.92 ms. Allocated memory was 39.8 MB in the beginning and 52.4 MB in the end (delta: 12.6 MB). Free memory was 16.9 MB in the beginning and 28.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.31 ms. Allocated memory is still 52.4 MB. Free memory was 28.6 MB in the beginning and 26.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.28 ms. Allocated memory is still 52.4 MB. Free memory was 26.9 MB in the beginning and 25.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 641.30 ms. Allocated memory is still 52.4 MB. Free memory was 25.7 MB in the beginning and 22.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 114187.91 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 22.1 MB in the beginning and 22.7 MB in the end (delta: -676.7 kB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * Witness Printer took 83.30 ms. Allocated memory is still 62.9 MB. Free memory was 22.7 MB in the beginning and 19.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] unsigned int A, B; [L24] unsigned int r, d, p, q; [L25] A = __VERIFIER_nondet_uint() [L26] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p [L34] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p [L34] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L38] COND TRUE !(r >= d) [L44] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p [L44] COND TRUE 1 [L15] COND FALSE !(!(cond)) [L15] COND FALSE !(!(cond)) [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p [L44] COND TRUE 1 [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 39 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 113.9s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 89.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 302 SDtfs, 693 SDslu, 790 SDs, 0 SdLazy, 1081 SolverSat, 409 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 38.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 491 GetRequests, 334 SyntacticMatches, 3 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 67.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 184 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 19.4s InterpolantComputationTime, 273 NumberOfCodeBlocks, 273 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 401 ConstructedInterpolants, 22 QuantifiedInterpolants, 102670 SizeOfPredicates, 57 NumberOfNonLiveVariables, 632 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 56/190 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...