./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg --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 93ad3f0e42b4c26a38d8e528f550b89aecdadec634fd1fe3b21f86af4528c655 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:20:42,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:20:42,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:20:42,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:20:42,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:20:42,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:20:42,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:20:42,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:20:42,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:20:42,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:20:42,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:20:42,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:20:42,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:20:42,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:20:42,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:20:42,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:20:42,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:20:42,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:20:42,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:20:42,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:20:42,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:20:42,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:20:42,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:20:42,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:20:42,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:20:42,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:20:42,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:20:42,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:20:42,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:20:42,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:20:42,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:20:42,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:20:42,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:20:42,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:20:42,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:20:42,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:20:42,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:20:42,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:20:42,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:20:42,854 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:20:42,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:20:42,856 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:20:42,909 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:20:42,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:20:42,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:20:42,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:20:42,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:20:42,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:20:42,913 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:20:42,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:20:42,913 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:20:42,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:20:42,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:20:42,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:20:42,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:20:42,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:20:42,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:20:42,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:20:42,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:20:42,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:20:42,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:20:42,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:20:42,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:20:42,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:20:42,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:20:42,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:20:42,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:20:42,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:20:42,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:20:42,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:20:42,923 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:20:42,925 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:20:42,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:20:42,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:20:42,926 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93ad3f0e42b4c26a38d8e528f550b89aecdadec634fd1fe3b21f86af4528c655 [2021-10-28 09:20:43,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:20:43,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:20:43,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:20:43,323 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:20:43,324 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:20:43,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2021-10-28 09:20:43,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/data/4b0da0d46/3617962446ff4ff1864c768c43c2adc5/FLAG9b0dd2e82 [2021-10-28 09:20:44,030 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:20:44,031 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2021-10-28 09:20:44,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/data/4b0da0d46/3617962446ff4ff1864c768c43c2adc5/FLAG9b0dd2e82 [2021-10-28 09:20:44,409 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/data/4b0da0d46/3617962446ff4ff1864c768c43c2adc5 [2021-10-28 09:20:44,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:20:44,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:20:44,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:20:44,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:20:44,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:20:44,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1931c0d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44, skipping insertion in model container [2021-10-28 09:20:44,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:20:44,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:20:44,674 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c[576,589] [2021-10-28 09:20:44,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:20:44,734 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:20:44,755 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c[576,589] [2021-10-28 09:20:44,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:20:44,815 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:20:44,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44 WrapperNode [2021-10-28 09:20:44,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:20:44,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:20:44,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:20:44,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:20:44,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:20:44,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:20:44,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:20:44,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:20:44,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:20:44,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:20:44,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:20:44,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:20:44,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (1/1) ... [2021-10-28 09:20:44,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:20:44,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:45,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:20:45,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:20:45,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:20:45,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:20:45,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:20:45,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:20:45,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:20:45,413 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-28 09:20:45,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:20:45 BoogieIcfgContainer [2021-10-28 09:20:45,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:20:45,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:20:45,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:20:45,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:20:45,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:20:44" (1/3) ... [2021-10-28 09:20:45,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff59be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:20:45, skipping insertion in model container [2021-10-28 09:20:45,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:20:44" (2/3) ... [2021-10-28 09:20:45,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff59be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:20:45, skipping insertion in model container [2021-10-28 09:20:45,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:20:45" (3/3) ... [2021-10-28 09:20:45,428 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound20.c [2021-10-28 09:20:45,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:20:45,436 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-28 09:20:45,529 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:20:45,538 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:20:45,539 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-28 09:20:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:20:45,566 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:45,567 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:45,568 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:45,575 INFO L85 PathProgramCache]: Analyzing trace with hash 122367883, now seen corresponding path program 1 times [2021-10-28 09:20:45,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:45,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44376291] [2021-10-28 09:20:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:45,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:45,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:45,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44376291] [2021-10-28 09:20:45,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44376291] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:45,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:20:45,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 09:20:45,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219874067] [2021-10-28 09:20:45,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 09:20:45,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:45,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 09:20:45,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:20:45,925 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:45,964 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2021-10-28 09:20:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 09:20:45,966 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-28 09:20:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:45,980 INFO L225 Difference]: With dead ends: 79 [2021-10-28 09:20:45,981 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 09:20:45,988 INFO L786 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 [2021-10-28 09:20:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 09:20:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-28 09:20:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-10-28 09:20:46,036 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 8 [2021-10-28 09:20:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:46,037 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-10-28 09:20:46,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-10-28 09:20:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:20:46,038 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:46,038 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:46,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:20:46,039 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:46,041 INFO L85 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-28 09:20:46,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:46,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682973386] [2021-10-28 09:20:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:46,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:46,068 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:46,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414242308] [2021-10-28 09:20:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:46,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:46,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:46,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:46,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:20:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:20:46,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:46,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:46,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682973386] [2021-10-28 09:20:46,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:46,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414242308] [2021-10-28 09:20:46,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414242308] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:46,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:20:46,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:20:46,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113818810] [2021-10-28 09:20:46,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:20:46,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:46,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:20:46,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:20:46,539 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:46,772 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-10-28 09:20:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:20:46,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-28 09:20:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:46,777 INFO L225 Difference]: With dead ends: 51 [2021-10-28 09:20:46,777 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 09:20:46,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:20:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 09:20:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-10-28 09:20:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-28 09:20:46,801 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 8 [2021-10-28 09:20:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:46,802 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-28 09:20:46,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:46,803 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-28 09:20:46,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 09:20:46,804 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:46,806 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:46,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:47,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:47,035 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:47,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:47,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1182906761, now seen corresponding path program 1 times [2021-10-28 09:20:47,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:47,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11854328] [2021-10-28 09:20:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:47,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:47,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:47,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342330683] [2021-10-28 09:20:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:47,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:47,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:47,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:47,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:20:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:20:47,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:47,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:47,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11854328] [2021-10-28 09:20:47,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:47,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342330683] [2021-10-28 09:20:47,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342330683] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:47,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:20:47,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:20:47,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318233180] [2021-10-28 09:20:47,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:20:47,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:20:47,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:20:47,226 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:47,245 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-10-28 09:20:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:20:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-28 09:20:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:47,255 INFO L225 Difference]: With dead ends: 44 [2021-10-28 09:20:47,255 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 09:20:47,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:20:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 09:20:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-28 09:20:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.303030303030303) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-28 09:20:47,263 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 9 [2021-10-28 09:20:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:47,263 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-28 09:20:47,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-28 09:20:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 09:20:47,264 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:47,265 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:47,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:47,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:47,491 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:47,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:47,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2021-10-28 09:20:47,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:47,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736754451] [2021-10-28 09:20:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:47,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:47,516 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:47,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152922679] [2021-10-28 09:20:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:47,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:47,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:47,518 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:47,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:20:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:47,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:20:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:47,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:47,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736754451] [2021-10-28 09:20:47,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:47,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152922679] [2021-10-28 09:20:47,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152922679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:47,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:20:47,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:20:47,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810079646] [2021-10-28 09:20:47,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:20:47,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:47,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:20:47,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:20:47,807 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:48,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:48,065 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-10-28 09:20:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:20:48,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-28 09:20:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:48,070 INFO L225 Difference]: With dead ends: 74 [2021-10-28 09:20:48,071 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 09:20:48,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:20:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 09:20:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2021-10-28 09:20:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-10-28 09:20:48,102 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 10 [2021-10-28 09:20:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:48,103 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-10-28 09:20:48,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-10-28 09:20:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:20:48,105 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:48,105 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:48,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:48,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:48,335 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1896102171, now seen corresponding path program 1 times [2021-10-28 09:20:48,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:48,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764122892] [2021-10-28 09:20:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:48,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:48,354 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:48,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264428947] [2021-10-28 09:20:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:48,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:48,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:48,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:48,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:20:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:20:48,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:48,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:48,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764122892] [2021-10-28 09:20:48,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:48,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264428947] [2021-10-28 09:20:48,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264428947] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:48,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:20:48,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:20:48,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497261283] [2021-10-28 09:20:48,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:20:48,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:48,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:20:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:20:48,575 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:48,700 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2021-10-28 09:20:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:20:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 09:20:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:48,709 INFO L225 Difference]: With dead ends: 104 [2021-10-28 09:20:48,709 INFO L226 Difference]: Without dead ends: 98 [2021-10-28 09:20:48,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:20:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-28 09:20:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2021-10-28 09:20:48,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.338235294117647) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2021-10-28 09:20:48,727 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 14 [2021-10-28 09:20:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:48,728 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2021-10-28 09:20:48,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2021-10-28 09:20:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:20:48,729 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:48,729 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:48,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:48,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:48,951 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:48,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:48,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1527669658, now seen corresponding path program 1 times [2021-10-28 09:20:48,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:48,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137277425] [2021-10-28 09:20:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:48,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:48,968 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:48,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354473886] [2021-10-28 09:20:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:48,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:48,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:48,970 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:48,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:20:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:49,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:20:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:49,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:49,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137277425] [2021-10-28 09:20:49,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:49,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354473886] [2021-10-28 09:20:49,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354473886] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:49,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:20:49,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:20:49,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468268934] [2021-10-28 09:20:49,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:20:49,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:20:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:20:49,177 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:49,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:49,217 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2021-10-28 09:20:49,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:20:49,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 09:20:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:49,220 INFO L225 Difference]: With dead ends: 121 [2021-10-28 09:20:49,220 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 09:20:49,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:20:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 09:20:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 09:20:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-10-28 09:20:49,250 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 18 [2021-10-28 09:20:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:49,251 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-10-28 09:20:49,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-10-28 09:20:49,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:20:49,252 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:49,252 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:49,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:49,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:49,479 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:49,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:49,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2092681793, now seen corresponding path program 1 times [2021-10-28 09:20:49,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:49,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592512401] [2021-10-28 09:20:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:49,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:49,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:49,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572787791] [2021-10-28 09:20:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:49,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:49,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:49,497 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:49,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:20:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:49,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:20:49,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:49,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:49,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592512401] [2021-10-28 09:20:49,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:49,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572787791] [2021-10-28 09:20:49,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572787791] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:49,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:20:49,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:20:49,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190927631] [2021-10-28 09:20:49,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:20:49,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:49,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:20:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:20:49,764 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:49,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:49,950 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2021-10-28 09:20:49,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:20:49,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 09:20:49,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:49,952 INFO L225 Difference]: With dead ends: 82 [2021-10-28 09:20:49,953 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 09:20:49,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:20:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 09:20:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2021-10-28 09:20:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-10-28 09:20:49,968 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 18 [2021-10-28 09:20:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:49,969 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-10-28 09:20:49,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:49,970 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-10-28 09:20:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:20:49,971 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:49,971 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:50,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:50,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 09:20:50,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:50,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1135496359, now seen corresponding path program 1 times [2021-10-28 09:20:50,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:50,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385097307] [2021-10-28 09:20:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:50,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:50,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:50,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941929701] [2021-10-28 09:20:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:50,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:50,207 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:50,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:20:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:20:50,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:50,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:50,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385097307] [2021-10-28 09:20:50,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:50,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941929701] [2021-10-28 09:20:50,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941929701] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:50,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:50,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 09:20:50,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285231740] [2021-10-28 09:20:50,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:20:50,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:50,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:20:50,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:20:50,441 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:50,497 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2021-10-28 09:20:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:20:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 09:20:50,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:50,503 INFO L225 Difference]: With dead ends: 82 [2021-10-28 09:20:50,504 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 09:20:50,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:20:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 09:20:50,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-10-28 09:20:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-10-28 09:20:50,519 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 24 [2021-10-28 09:20:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:50,520 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-10-28 09:20:50,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-10-28 09:20:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-28 09:20:50,521 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:50,522 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:50,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:50,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:50,747 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1501746768, now seen corresponding path program 1 times [2021-10-28 09:20:50,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:50,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917467391] [2021-10-28 09:20:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:50,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:50,769 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:50,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073471395] [2021-10-28 09:20:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:50,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:50,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:50,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:50,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:20:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:50,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:20:50,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:51,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:51,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917467391] [2021-10-28 09:20:51,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:51,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073471395] [2021-10-28 09:20:51,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073471395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:51,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:51,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 09:20:51,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005250623] [2021-10-28 09:20:51,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:20:51,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:20:51,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:20:51,321 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:51,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:51,714 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-10-28 09:20:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:20:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-28 09:20:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:51,717 INFO L225 Difference]: With dead ends: 142 [2021-10-28 09:20:51,717 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 09:20:51,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:20:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 09:20:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2021-10-28 09:20:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 95 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2021-10-28 09:20:51,745 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 24 [2021-10-28 09:20:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:51,746 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2021-10-28 09:20:51,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2021-10-28 09:20:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 09:20:51,749 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:51,750 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:51,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:51,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:51,965 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:51,965 INFO L85 PathProgramCache]: Analyzing trace with hash 839910097, now seen corresponding path program 1 times [2021-10-28 09:20:51,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:51,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015147204] [2021-10-28 09:20:51,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:51,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:51,980 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:51,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306398465] [2021-10-28 09:20:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:51,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:51,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:51,982 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:52,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:20:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:52,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 09:20:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:52,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:52,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015147204] [2021-10-28 09:20:52,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:52,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306398465] [2021-10-28 09:20:52,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306398465] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:52,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:52,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 09:20:52,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665740403] [2021-10-28 09:20:52,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:20:52,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:20:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:20:52,543 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:52,765 INFO L93 Difference]: Finished difference Result 154 states and 178 transitions. [2021-10-28 09:20:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:20:52,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-28 09:20:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:52,769 INFO L225 Difference]: With dead ends: 154 [2021-10-28 09:20:52,769 INFO L226 Difference]: Without dead ends: 146 [2021-10-28 09:20:52,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:20:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-28 09:20:52,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 108. [2021-10-28 09:20:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.2450980392156863) internal successors, (127), 107 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2021-10-28 09:20:52,791 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 25 [2021-10-28 09:20:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:52,792 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2021-10-28 09:20:52,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2021-10-28 09:20:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 09:20:52,794 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:52,794 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:52,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:53,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 09:20:53,023 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:53,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1388511663, now seen corresponding path program 1 times [2021-10-28 09:20:53,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:53,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421119742] [2021-10-28 09:20:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:53,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:53,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:53,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82926060] [2021-10-28 09:20:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:53,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:53,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:53,040 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:53,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:20:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:53,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:20:53,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:53,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:53,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421119742] [2021-10-28 09:20:53,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:53,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82926060] [2021-10-28 09:20:53,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82926060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:53,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:53,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-28 09:20:53,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110306335] [2021-10-28 09:20:53,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:20:53,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:53,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:20:53,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:20:53,360 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:53,410 INFO L93 Difference]: Finished difference Result 166 states and 196 transitions. [2021-10-28 09:20:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:20:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-28 09:20:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:53,412 INFO L225 Difference]: With dead ends: 166 [2021-10-28 09:20:53,413 INFO L226 Difference]: Without dead ends: 112 [2021-10-28 09:20:53,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:20:53,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-28 09:20:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-10-28 09:20:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 111 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2021-10-28 09:20:53,429 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 28 [2021-10-28 09:20:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:53,429 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2021-10-28 09:20:53,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2021-10-28 09:20:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 09:20:53,435 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:53,435 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:53,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:53,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 09:20:53,643 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:53,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1005744700, now seen corresponding path program 1 times [2021-10-28 09:20:53,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:53,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274478201] [2021-10-28 09:20:53,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:53,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:53,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:53,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111265229] [2021-10-28 09:20:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:53,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:53,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:53,659 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:53,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:20:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:20:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:53,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:53,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274478201] [2021-10-28 09:20:53,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:53,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111265229] [2021-10-28 09:20:53,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111265229] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:20:53,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:20:53,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:20:53,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558108890] [2021-10-28 09:20:53,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:20:53,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:53,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:20:53,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:20:53,990 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:54,092 INFO L93 Difference]: Finished difference Result 215 states and 249 transitions. [2021-10-28 09:20:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:20:54,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-28 09:20:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:54,094 INFO L225 Difference]: With dead ends: 215 [2021-10-28 09:20:54,094 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 09:20:54,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:20:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 09:20:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2021-10-28 09:20:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 99 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2021-10-28 09:20:54,111 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 33 [2021-10-28 09:20:54,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:54,112 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2021-10-28 09:20:54,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2021-10-28 09:20:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:20:54,116 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:54,116 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:54,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-28 09:20:54,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 09:20:54,331 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash 332875516, now seen corresponding path program 1 times [2021-10-28 09:20:54,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:54,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701358528] [2021-10-28 09:20:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:54,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:54,372 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:54,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049299920] [2021-10-28 09:20:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:54,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:54,382 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:54,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:20:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:20:54,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:54,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:54,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701358528] [2021-10-28 09:20:54,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:54,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049299920] [2021-10-28 09:20:54,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049299920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:54,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:54,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 09:20:54,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984781715] [2021-10-28 09:20:54,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:20:54,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:20:54,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:20:54,764 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:54,810 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-10-28 09:20:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:20:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-28 09:20:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:54,812 INFO L225 Difference]: With dead ends: 109 [2021-10-28 09:20:54,812 INFO L226 Difference]: Without dead ends: 105 [2021-10-28 09:20:54,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:20:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-28 09:20:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-10-28 09:20:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2021-10-28 09:20:54,827 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 34 [2021-10-28 09:20:54,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:54,827 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2021-10-28 09:20:54,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2021-10-28 09:20:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:20:54,829 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:54,829 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:54,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:55,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:55,055 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:55,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:55,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1990599685, now seen corresponding path program 2 times [2021-10-28 09:20:55,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:55,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854038249] [2021-10-28 09:20:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:55,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:55,070 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:55,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964689248] [2021-10-28 09:20:55,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:20:55,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:55,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:55,072 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:55,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:20:55,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:20:55,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:55,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:20:55,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:55,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:55,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854038249] [2021-10-28 09:20:55,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:55,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964689248] [2021-10-28 09:20:55,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964689248] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:55,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:55,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 09:20:55,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893195240] [2021-10-28 09:20:55,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:20:55,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:55,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:20:55,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:20:55,711 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:56,155 INFO L93 Difference]: Finished difference Result 188 states and 216 transitions. [2021-10-28 09:20:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:20:56,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-28 09:20:56,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:56,158 INFO L225 Difference]: With dead ends: 188 [2021-10-28 09:20:56,158 INFO L226 Difference]: Without dead ends: 182 [2021-10-28 09:20:56,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:20:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-28 09:20:56,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 123. [2021-10-28 09:20:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 122 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-10-28 09:20:56,174 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 34 [2021-10-28 09:20:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:56,174 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-10-28 09:20:56,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-10-28 09:20:56,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 09:20:56,194 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:56,194 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:56,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:56,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 09:20:56,407 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:56,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1728467740, now seen corresponding path program 1 times [2021-10-28 09:20:56,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:56,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572035183] [2021-10-28 09:20:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:56,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:56,420 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:56,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872595734] [2021-10-28 09:20:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:56,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:56,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:56,422 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:56,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:20:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:56,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-28 09:20:56,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:57,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:57,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572035183] [2021-10-28 09:20:57,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:57,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872595734] [2021-10-28 09:20:57,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872595734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:57,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:57,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 09:20:57,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933779106] [2021-10-28 09:20:57,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:20:57,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:57,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:20:57,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:20:57,331 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:57,621 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2021-10-28 09:20:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:20:57,622 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-28 09:20:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:57,623 INFO L225 Difference]: With dead ends: 197 [2021-10-28 09:20:57,624 INFO L226 Difference]: Without dead ends: 189 [2021-10-28 09:20:57,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:20:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-28 09:20:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 145. [2021-10-28 09:20:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 139 states have (on average 1.2302158273381294) internal successors, (171), 144 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2021-10-28 09:20:57,645 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 35 [2021-10-28 09:20:57,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:57,646 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2021-10-28 09:20:57,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2021-10-28 09:20:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:20:57,649 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:57,649 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:57,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:57,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:20:57,863 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1769158268, now seen corresponding path program 2 times [2021-10-28 09:20:57,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:57,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070457452] [2021-10-28 09:20:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:57,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:57,886 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:57,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692268535] [2021-10-28 09:20:57,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:20:57,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:57,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:57,896 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:57,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:20:58,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:20:58,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:58,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:20:58,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:58,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:58,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070457452] [2021-10-28 09:20:58,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:58,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692268535] [2021-10-28 09:20:58,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692268535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:58,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:58,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 09:20:58,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804080245] [2021-10-28 09:20:58,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:20:58,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:58,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:20:58,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:20:58,317 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:58,368 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2021-10-28 09:20:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:20:58,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-28 09:20:58,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:58,370 INFO L225 Difference]: With dead ends: 220 [2021-10-28 09:20:58,370 INFO L226 Difference]: Without dead ends: 149 [2021-10-28 09:20:58,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:20:58,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-28 09:20:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-10-28 09:20:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 143 states have (on average 1.2237762237762237) internal successors, (175), 148 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2021-10-28 09:20:58,394 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 38 [2021-10-28 09:20:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:58,394 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2021-10-28 09:20:58,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2021-10-28 09:20:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 09:20:58,397 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:58,397 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:58,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:58,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 09:20:58,612 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:58,613 INFO L85 PathProgramCache]: Analyzing trace with hash -307935353, now seen corresponding path program 1 times [2021-10-28 09:20:58,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:58,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278023713] [2021-10-28 09:20:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:58,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:58,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:58,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789047343] [2021-10-28 09:20:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:58,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:58,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:58,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:20:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:20:58,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:20:58,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:59,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:59,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278023713] [2021-10-28 09:20:59,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:59,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789047343] [2021-10-28 09:20:59,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789047343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:59,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:59,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 09:20:59,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513991013] [2021-10-28 09:20:59,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:20:59,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:20:59,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:20:59,140 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:59,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:20:59,210 INFO L93 Difference]: Finished difference Result 232 states and 275 transitions. [2021-10-28 09:20:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:20:59,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-28 09:20:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:20:59,212 INFO L225 Difference]: With dead ends: 232 [2021-10-28 09:20:59,212 INFO L226 Difference]: Without dead ends: 161 [2021-10-28 09:20:59,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:20:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-28 09:20:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-10-28 09:20:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 153 states have (on average 1.2091503267973855) internal successors, (185), 158 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 185 transitions. [2021-10-28 09:20:59,232 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 185 transitions. Word has length 43 [2021-10-28 09:20:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:20:59,232 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 185 transitions. [2021-10-28 09:20:59,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:20:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 185 transitions. [2021-10-28 09:20:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 09:20:59,234 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:20:59,234 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:20:59,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:20:59,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 09:20:59,459 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:20:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:20:59,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1736500463, now seen corresponding path program 2 times [2021-10-28 09:20:59,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:20:59,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136653731] [2021-10-28 09:20:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:20:59,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:20:59,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:20:59,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531422157] [2021-10-28 09:20:59,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:20:59,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:20:59,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:20:59,487 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:20:59,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:20:59,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:20:59,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:20:59,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:20:59,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:20:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:20:59,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:20:59,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136653731] [2021-10-28 09:20:59,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:20:59,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531422157] [2021-10-28 09:20:59,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531422157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:20:59,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:20:59,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 09:20:59,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663478937] [2021-10-28 09:20:59,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:20:59,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:20:59,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:20:59,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:20:59,986 INFO L87 Difference]: Start difference. First operand 159 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:00,049 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2021-10-28 09:21:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:21:00,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-28 09:21:00,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:00,052 INFO L225 Difference]: With dead ends: 166 [2021-10-28 09:21:00,052 INFO L226 Difference]: Without dead ends: 162 [2021-10-28 09:21:00,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:21:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-28 09:21:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-10-28 09:21:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.205128205128205) internal successors, (188), 161 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2021-10-28 09:21:00,072 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 44 [2021-10-28 09:21:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:00,072 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2021-10-28 09:21:00,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2021-10-28 09:21:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 09:21:00,073 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:00,074 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:00,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:00,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:21:00,299 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:21:00,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:00,299 INFO L85 PathProgramCache]: Analyzing trace with hash -78776294, now seen corresponding path program 3 times [2021-10-28 09:21:00,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:00,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989654661] [2021-10-28 09:21:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:00,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:00,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:21:00,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469704844] [2021-10-28 09:21:00,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:21:00,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:00,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:00,313 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:00,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:21:00,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 09:21:00,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:00,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 09:21:00,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 09:21:01,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:01,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989654661] [2021-10-28 09:21:01,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:21:01,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469704844] [2021-10-28 09:21:01,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469704844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:01,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:21:01,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 09:21:01,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123690504] [2021-10-28 09:21:01,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:21:01,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:01,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:21:01,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:21:01,268 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:10,614 WARN L207 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-10-28 09:21:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:22,131 INFO L93 Difference]: Finished difference Result 184 states and 212 transitions. [2021-10-28 09:21:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:21:22,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-28 09:21:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:22,134 INFO L225 Difference]: With dead ends: 184 [2021-10-28 09:21:22,134 INFO L226 Difference]: Without dead ends: 178 [2021-10-28 09:21:22,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=21, Invalid=34, Unknown=1, NotChecked=0, Total=56 [2021-10-28 09:21:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-28 09:21:22,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 110. [2021-10-28 09:21:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1495327102803738) internal successors, (123), 109 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2021-10-28 09:21:22,156 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 44 [2021-10-28 09:21:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:22,156 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2021-10-28 09:21:22,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2021-10-28 09:21:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 09:21:22,158 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:22,158 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:22,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:22,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:22,381 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:21:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:22,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2002321831, now seen corresponding path program 2 times [2021-10-28 09:21:22,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:22,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755560875] [2021-10-28 09:21:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:22,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:22,405 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:21:22,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549113030] [2021-10-28 09:21:22,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:21:22,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:22,412 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:22,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:21:22,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:21:22,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:22,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:21:22,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:21:23,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:23,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755560875] [2021-10-28 09:21:23,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:21:23,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549113030] [2021-10-28 09:21:23,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549113030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:23,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:21:23,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 09:21:23,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159511231] [2021-10-28 09:21:23,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:21:23,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:23,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:21:23,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:21:23,851 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:24,541 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2021-10-28 09:21:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:21:24,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-28 09:21:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:24,544 INFO L225 Difference]: With dead ends: 157 [2021-10-28 09:21:24,544 INFO L226 Difference]: Without dead ends: 149 [2021-10-28 09:21:24,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:21:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-28 09:21:24,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2021-10-28 09:21:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.1504424778761062) internal successors, (130), 115 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-10-28 09:21:24,567 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 45 [2021-10-28 09:21:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:24,568 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-10-28 09:21:24,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-10-28 09:21:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 09:21:24,569 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:24,569 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:24,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:24,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:24,770 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:21:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:24,771 INFO L85 PathProgramCache]: Analyzing trace with hash 762563284, now seen corresponding path program 3 times [2021-10-28 09:21:24,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:24,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102738128] [2021-10-28 09:21:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:24,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:24,781 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:21:24,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664676561] [2021-10-28 09:21:24,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:21:24,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:24,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:24,784 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:24,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:21:25,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 09:21:25,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:21:25,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 09:21:25,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:25,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102738128] [2021-10-28 09:21:25,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:21:25,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664676561] [2021-10-28 09:21:25,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664676561] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:21:25,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:21:25,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:21:25,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546452665] [2021-10-28 09:21:25,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:21:25,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:21:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:21:25,495 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:25,777 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2021-10-28 09:21:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:21:25,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-28 09:21:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:25,780 INFO L225 Difference]: With dead ends: 161 [2021-10-28 09:21:25,780 INFO L226 Difference]: Without dead ends: 145 [2021-10-28 09:21:25,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:21:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-28 09:21:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2021-10-28 09:21:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 110 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2021-10-28 09:21:25,804 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 49 [2021-10-28 09:21:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:25,804 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2021-10-28 09:21:25,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2021-10-28 09:21:25,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 09:21:25,806 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:25,806 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:25,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:26,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:26,035 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:21:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1005346468, now seen corresponding path program 2 times [2021-10-28 09:21:26,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:26,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142840950] [2021-10-28 09:21:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:26,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:26,051 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:21:26,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965010847] [2021-10-28 09:21:26,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:21:26,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:26,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:26,055 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:26,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:21:26,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:21:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:26,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:21:26,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:21:26,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:26,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142840950] [2021-10-28 09:21:26,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:21:26,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965010847] [2021-10-28 09:21:26,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965010847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:26,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:21:26,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 09:21:26,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296438179] [2021-10-28 09:21:26,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:21:26,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:21:26,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:21:26,760 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:27,064 INFO L93 Difference]: Finished difference Result 241 states and 262 transitions. [2021-10-28 09:21:27,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:21:27,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-10-28 09:21:27,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:27,069 INFO L225 Difference]: With dead ends: 241 [2021-10-28 09:21:27,070 INFO L226 Difference]: Without dead ends: 166 [2021-10-28 09:21:27,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:21:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-28 09:21:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2021-10-28 09:21:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 129 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 146 transitions. [2021-10-28 09:21:27,099 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 146 transitions. Word has length 53 [2021-10-28 09:21:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:27,100 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 146 transitions. [2021-10-28 09:21:27,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 146 transitions. [2021-10-28 09:21:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 09:21:27,101 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:27,101 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:27,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:27,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:27,319 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:21:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:27,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1869464814, now seen corresponding path program 3 times [2021-10-28 09:21:27,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:27,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977235147] [2021-10-28 09:21:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:27,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:27,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:21:27,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843789731] [2021-10-28 09:21:27,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:21:27,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:27,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:27,333 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:27,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:21:27,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 09:21:27,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:21:27,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-28 09:21:28,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:28,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977235147] [2021-10-28 09:21:28,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:21:28,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843789731] [2021-10-28 09:21:28,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843789731] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:21:28,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:21:28,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:21:28,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135448946] [2021-10-28 09:21:28,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:21:28,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:28,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:21:28,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:21:28,172 INFO L87 Difference]: Start difference. First operand 130 states and 146 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:28,409 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2021-10-28 09:21:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:21:28,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-10-28 09:21:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:28,411 INFO L225 Difference]: With dead ends: 142 [2021-10-28 09:21:28,411 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 09:21:28,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:21:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 09:21:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-10-28 09:21:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.096774193548387) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-10-28 09:21:28,433 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 53 [2021-10-28 09:21:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:28,433 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-10-28 09:21:28,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-10-28 09:21:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 09:21:28,435 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:28,435 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:28,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:28,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:28,659 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:21:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:28,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1395693798, now seen corresponding path program 4 times [2021-10-28 09:21:28,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:28,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507961597] [2021-10-28 09:21:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:28,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:28,676 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:21:28,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99105738] [2021-10-28 09:21:28,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:21:28,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:28,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:28,678 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:28,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:21:29,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:21:29,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:29,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 09:21:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:21:30,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:30,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507961597] [2021-10-28 09:21:30,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:21:30,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99105738] [2021-10-28 09:21:30,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99105738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:30,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:21:30,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 09:21:30,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616261383] [2021-10-28 09:21:30,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:21:30,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:21:30,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:21:30,167 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:30,634 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2021-10-28 09:21:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:21:30,635 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-28 09:21:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:30,636 INFO L225 Difference]: With dead ends: 170 [2021-10-28 09:21:30,637 INFO L226 Difference]: Without dead ends: 164 [2021-10-28 09:21:30,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:21:30,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-28 09:21:30,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2021-10-28 09:21:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.101010101010101) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2021-10-28 09:21:30,660 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 54 [2021-10-28 09:21:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:30,661 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2021-10-28 09:21:30,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2021-10-28 09:21:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 09:21:30,662 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:30,662 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:30,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:30,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 09:21:30,883 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:21:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 62330478, now seen corresponding path program 3 times [2021-10-28 09:21:30,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:30,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203567495] [2021-10-28 09:21:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:30,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:30,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:21:30,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158364457] [2021-10-28 09:21:30,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:21:30,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:30,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:30,902 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:30,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:21:31,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:21:31,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:31,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 09:21:31,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-28 09:21:34,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:34,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203567495] [2021-10-28 09:21:34,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:21:34,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158364457] [2021-10-28 09:21:34,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158364457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:34,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:21:34,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 09:21:34,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356262516] [2021-10-28 09:21:34,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:21:34,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:34,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:21:34,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=35, Unknown=1, NotChecked=0, Total=56 [2021-10-28 09:21:34,724 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:56,241 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2021-10-28 09:21:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:21:56,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-28 09:21:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:56,244 INFO L225 Difference]: With dead ends: 143 [2021-10-28 09:21:56,244 INFO L226 Difference]: Without dead ends: 138 [2021-10-28 09:21:56,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=61, Invalid=94, Unknown=1, NotChecked=0, Total=156 [2021-10-28 09:21:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-28 09:21:56,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2021-10-28 09:21:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 112 states have (on average 1.1071428571428572) internal successors, (124), 113 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2021-10-28 09:21:56,273 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 58 [2021-10-28 09:21:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:56,273 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2021-10-28 09:21:56,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2021-10-28 09:21:56,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-28 09:21:56,275 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:56,275 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:56,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:56,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 09:21:56,495 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:21:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:56,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1931506154, now seen corresponding path program 1 times [2021-10-28 09:21:56,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:56,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836313733] [2021-10-28 09:21:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:56,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:56,519 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:21:56,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247986647] [2021-10-28 09:21:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:56,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:56,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:56,522 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:56,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:21:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:21:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:21:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:21:57,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:57,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836313733] [2021-10-28 09:21:57,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:21:57,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247986647] [2021-10-28 09:21:57,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247986647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:57,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:21:57,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 09:21:57,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063789739] [2021-10-28 09:21:57,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:21:57,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:57,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:21:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:21:57,335 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:21:57,438 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2021-10-28 09:21:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:21:57,439 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-10-28 09:21:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:21:57,440 INFO L225 Difference]: With dead ends: 185 [2021-10-28 09:21:57,440 INFO L226 Difference]: Without dead ends: 129 [2021-10-28 09:21:57,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:21:57,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-28 09:21:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2021-10-28 09:21:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.096) internal successors, (137), 126 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2021-10-28 09:21:57,473 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 59 [2021-10-28 09:21:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:21:57,473 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2021-10-28 09:21:57,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:21:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2021-10-28 09:21:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 09:21:57,475 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:21:57,475 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:21:57,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:21:57,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 09:21:57,691 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:21:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:21:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1646664921, now seen corresponding path program 4 times [2021-10-28 09:21:57,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:21:57,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556143690] [2021-10-28 09:21:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:21:57,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:21:57,708 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:21:57,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928728580] [2021-10-28 09:21:57,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:21:57,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:21:57,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:21:57,713 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:21:57,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:21:58,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:21:58,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:21:58,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 09:21:58,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:21:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:21:59,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:21:59,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556143690] [2021-10-28 09:21:59,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:21:59,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928728580] [2021-10-28 09:21:59,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928728580] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:21:59,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:21:59,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-28 09:21:59,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129671100] [2021-10-28 09:21:59,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:21:59,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:21:59,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:21:59,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:21:59,491 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:00,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:00,185 INFO L93 Difference]: Finished difference Result 251 states and 279 transitions. [2021-10-28 09:22:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 09:22:00,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-10-28 09:22:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:00,187 INFO L225 Difference]: With dead ends: 251 [2021-10-28 09:22:00,188 INFO L226 Difference]: Without dead ends: 184 [2021-10-28 09:22:00,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:22:00,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-28 09:22:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 137. [2021-10-28 09:22:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.0888888888888888) internal successors, (147), 136 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2021-10-28 09:22:00,227 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 63 [2021-10-28 09:22:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:00,228 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2021-10-28 09:22:00,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:00,228 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2021-10-28 09:22:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 09:22:00,229 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:00,229 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:00,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:00,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:00,443 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:22:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1810613891, now seen corresponding path program 3 times [2021-10-28 09:22:00,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:00,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410046956] [2021-10-28 09:22:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:00,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:00,466 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:22:00,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768678772] [2021-10-28 09:22:00,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:22:00,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:00,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:00,492 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:00,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 09:22:01,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 09:22:01,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:22:01,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:22:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-28 09:22:01,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:01,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410046956] [2021-10-28 09:22:01,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:22:01,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768678772] [2021-10-28 09:22:01,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768678772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:01,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:22:01,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 09:22:01,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176867260] [2021-10-28 09:22:01,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:22:01,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:01,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:22:01,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:22:01,659 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:01,940 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2021-10-28 09:22:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:22:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-10-28 09:22:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:01,943 INFO L225 Difference]: With dead ends: 152 [2021-10-28 09:22:01,943 INFO L226 Difference]: Without dead ends: 150 [2021-10-28 09:22:01,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:22:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-28 09:22:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 134. [2021-10-28 09:22:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 1.0909090909090908) internal successors, (144), 133 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2021-10-28 09:22:01,976 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 65 [2021-10-28 09:22:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:01,976 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2021-10-28 09:22:01,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2021-10-28 09:22:01,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-28 09:22:01,978 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:01,978 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:02,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:02,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 09:22:02,192 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:22:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1696816334, now seen corresponding path program 5 times [2021-10-28 09:22:02,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:02,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788712380] [2021-10-28 09:22:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:02,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:02,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:22:02,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277777817] [2021-10-28 09:22:02,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:22:02,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:02,216 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:02,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 09:22:02,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 09:22:02,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:22:02,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 09:22:02,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:03,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:03,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788712380] [2021-10-28 09:22:03,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:22:03,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277777817] [2021-10-28 09:22:03,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277777817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:03,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:22:03,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-28 09:22:03,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481923466] [2021-10-28 09:22:03,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:22:03,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:03,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:22:03,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:22:03,302 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:03,448 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2021-10-28 09:22:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:22:03,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-10-28 09:22:03,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:03,451 INFO L225 Difference]: With dead ends: 237 [2021-10-28 09:22:03,451 INFO L226 Difference]: Without dead ends: 165 [2021-10-28 09:22:03,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-10-28 09:22:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-28 09:22:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2021-10-28 09:22:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.0807453416149069) internal successors, (174), 162 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2021-10-28 09:22:03,497 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 73 [2021-10-28 09:22:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:03,498 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2021-10-28 09:22:03,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2021-10-28 09:22:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 09:22:03,500 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:03,500 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:03,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:03,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:22:03,715 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:22:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:03,715 INFO L85 PathProgramCache]: Analyzing trace with hash 38042175, now seen corresponding path program 5 times [2021-10-28 09:22:03,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:03,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313124887] [2021-10-28 09:22:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:03,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:03,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:22:03,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384482134] [2021-10-28 09:22:03,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:22:03,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:03,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:03,736 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:03,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 09:22:04,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 09:22:04,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:22:04,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:22:04,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:04,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:04,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313124887] [2021-10-28 09:22:04,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:22:04,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384482134] [2021-10-28 09:22:04,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384482134] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:04,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:22:04,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-28 09:22:04,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77986042] [2021-10-28 09:22:04,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:22:04,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:04,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:22:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:22:04,862 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:04,998 INFO L93 Difference]: Finished difference Result 208 states and 221 transitions. [2021-10-28 09:22:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:22:04,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-10-28 09:22:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:05,001 INFO L225 Difference]: With dead ends: 208 [2021-10-28 09:22:05,001 INFO L226 Difference]: Without dead ends: 204 [2021-10-28 09:22:05,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:22:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-28 09:22:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 172. [2021-10-28 09:22:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 170 states have (on average 1.0823529411764705) internal successors, (184), 171 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 184 transitions. [2021-10-28 09:22:05,047 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 184 transitions. Word has length 79 [2021-10-28 09:22:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:05,048 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 184 transitions. [2021-10-28 09:22:05,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 11 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 184 transitions. [2021-10-28 09:22:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-28 09:22:05,050 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:05,050 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:05,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:05,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:05,279 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:22:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:05,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1178568761, now seen corresponding path program 4 times [2021-10-28 09:22:05,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:05,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860600737] [2021-10-28 09:22:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:05,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:05,299 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:22:05,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775355625] [2021-10-28 09:22:05,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:22:05,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:05,302 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:05,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 09:22:06,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:22:06,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:22:06,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 09:22:06,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:07,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:07,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860600737] [2021-10-28 09:22:07,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:22:07,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775355625] [2021-10-28 09:22:07,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775355625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:07,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:22:07,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 09:22:07,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413318638] [2021-10-28 09:22:07,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:22:07,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:22:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:22:07,435 INFO L87 Difference]: Start difference. First operand 172 states and 184 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:08,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:08,092 INFO L93 Difference]: Finished difference Result 197 states and 212 transitions. [2021-10-28 09:22:08,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:22:08,093 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-10-28 09:22:08,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:08,095 INFO L225 Difference]: With dead ends: 197 [2021-10-28 09:22:08,095 INFO L226 Difference]: Without dead ends: 189 [2021-10-28 09:22:08,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:22:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-28 09:22:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 169. [2021-10-28 09:22:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.0778443113772456) internal successors, (180), 168 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:08,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 180 transitions. [2021-10-28 09:22:08,143 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 180 transitions. Word has length 80 [2021-10-28 09:22:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:08,146 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 180 transitions. [2021-10-28 09:22:08,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 180 transitions. [2021-10-28 09:22:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-28 09:22:08,157 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:08,157 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:08,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:08,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 09:22:08,379 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 09:22:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1490592583, now seen corresponding path program 6 times [2021-10-28 09:22:08,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:08,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440776422] [2021-10-28 09:22:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:08,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:08,392 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 09:22:08,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124957163] [2021-10-28 09:22:08,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:22:08,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:08,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:08,400 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:08,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 09:22:09,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 09:22:09,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:22:09,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 09:22:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 123 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:22:13,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:13,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440776422] [2021-10-28 09:22:13,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 09:22:13,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124957163] [2021-10-28 09:22:13,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124957163] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:13,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:22:13,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-28 09:22:13,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009721394] [2021-10-28 09:22:13,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:22:13,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:22:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2021-10-28 09:22:13,116 INFO L87 Difference]: Start difference. First operand 169 states and 180 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:26,340 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (= c_ULTIMATE.start_main_~b~0 (* c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~y~0)))) (or (and (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (not .cse0)) (and (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) .cse0))) (= c_ULTIMATE.start_main_~q~0 0) (= c_ULTIMATE.start_main_~x~0 (+ c_ULTIMATE.start_main_~r~0 (* c_ULTIMATE.start_main_~q~0 c_ULTIMATE.start_main_~y~0))) (= c_ULTIMATE.start_main_~b~0 (* 2 (* c_ULTIMATE.start_main_~y~0 (div (* c_ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~x~0) (= (mod c_ULTIMATE.start_main_~a~0 (- 2)) 0)) is different from false [2021-10-28 09:22:41,149 WARN L207 SmtUtils]: Spent 7.13 s on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-10-28 09:22:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:57,305 INFO L93 Difference]: Finished difference Result 185 states and 197 transitions. [2021-10-28 09:22:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:22:57,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-10-28 09:22:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:57,306 INFO L225 Difference]: With dead ends: 185 [2021-10-28 09:22:57,306 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:22:57,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=154, Invalid=399, Unknown=3, NotChecked=44, Total=600 [2021-10-28 09:22:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:22:57,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:22:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:22:57,308 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2021-10-28 09:22:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:57,308 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:22:57,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:22:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:22:57,309 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:22:57,311 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:22:57,312 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:22:57,312 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:22:57,312 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:22:57,312 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:22:57,312 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:22:57,312 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:22:57,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:57,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-28 09:22:57,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:22:57,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:22:57,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:22:58,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:22:58,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:22:58,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:22:58,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:22:58,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:22:59,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:22:59,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:22:59,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:23:17,801 WARN L207 SmtUtils]: Spent 6.78 s on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2021-10-28 09:23:23,880 WARN L207 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 170 DAG size of output: 31 [2021-10-28 09:23:37,129 WARN L207 SmtUtils]: Spent 13.25 s on a formula simplification. DAG size of input: 129 DAG size of output: 27 [2021-10-28 09:23:37,132 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-10-28 09:23:37,132 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-10-28 09:23:37,132 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-10-28 09:23:37,132 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:23:37,132 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:23:37,133 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-10-28 09:23:37,133 INFO L857 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2021-10-28 09:23:37,133 INFO L853 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (and (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= 1 ULTIMATE.start_main_~y~0))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~a~0 1) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0)))) [2021-10-28 09:23:37,133 INFO L857 garLoopResultBuilder]: For program point L37-4(lines 37 61) no Hoare annotation was computed. [2021-10-28 09:23:37,133 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-10-28 09:23:37,133 INFO L857 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2021-10-28 09:23:37,134 INFO L853 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (let ((.cse3 (= ULTIMATE.start_main_~a~0 1)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse4 (<= 1 ULTIMATE.start_main_~r~0)) (.cse5 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse0 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~q~0 2) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* 2 ULTIMATE.start_main_~y~0))) (< ULTIMATE.start_main_~r~0 (* 2 ULTIMATE.start_main_~b~0)) (<= ~counter~0 4) .cse3 .cse4 .cse6) (and .cse0 .cse1 .cse2 .cse4 .cse5 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-10-28 09:23:37,134 INFO L857 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2021-10-28 09:23:37,134 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-10-28 09:23:37,134 INFO L860 garLoopResultBuilder]: At program point L64(lines 23 65) the Hoare annotation is: true [2021-10-28 09:23:37,135 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-10-28 09:23:37,135 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-10-28 09:23:37,135 INFO L853 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= 1 ULTIMATE.start_main_~y~0))) (or (and (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0)) .cse0 (< ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) .cse1 (= ULTIMATE.start_main_~q~0 1)) (and .cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1 (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0)))))) [2021-10-28 09:23:37,135 INFO L857 garLoopResultBuilder]: For program point L15-3(lines 15 18) no Hoare annotation was computed. [2021-10-28 09:23:37,136 INFO L853 garLoopResultBuilder]: At program point L15-5(lines 41 42) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse2 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse1 (<= 1 ULTIMATE.start_main_~y~0))) (or (and .cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1 (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0)))) (and (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0)) .cse0 .cse2 (< ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) .cse1 (= ULTIMATE.start_main_~q~0 1)) (let ((.cse3 (* 2 ULTIMATE.start_main_~y~0))) (and .cse0 (< (div (+ (- 1) (* ULTIMATE.start_main_~r~0 (- 1))) (- 2)) (+ ULTIMATE.start_main_~y~0 1)) .cse2 (= ULTIMATE.start_main_~q~0 2) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 .cse3)) (<= ~counter~0 4) .cse1 (<= .cse3 ULTIMATE.start_main_~x~0) (<= (div (* ULTIMATE.start_main_~b~0 (- 1)) (- 2)) ULTIMATE.start_main_~y~0) (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0))))) [2021-10-28 09:23:37,136 INFO L857 garLoopResultBuilder]: For program point L15-6(lines 15 18) no Hoare annotation was computed. [2021-10-28 09:23:37,136 INFO L853 garLoopResultBuilder]: At program point L15-8(lines 14 20) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= 1 ULTIMATE.start_main_~r~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~a~0 1) .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-10-28 09:23:37,136 INFO L857 garLoopResultBuilder]: For program point L15-9(lines 15 18) no Hoare annotation was computed. [2021-10-28 09:23:37,137 INFO L853 garLoopResultBuilder]: At program point L15-11(lines 14 20) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= 1 ULTIMATE.start_main_~r~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~a~0 1) .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-10-28 09:23:37,137 INFO L857 garLoopResultBuilder]: For program point L15-12(lines 15 18) no Hoare annotation was computed. [2021-10-28 09:23:37,137 INFO L853 garLoopResultBuilder]: At program point L15-14(lines 51 52) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= 1 ULTIMATE.start_main_~r~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0))))) (or (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~a~0 1) .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) [2021-10-28 09:23:37,137 INFO L857 garLoopResultBuilder]: For program point L15-15(lines 15 18) no Hoare annotation was computed. [2021-10-28 09:23:37,138 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:23:37,138 INFO L853 garLoopResultBuilder]: At program point L15-17(lines 14 20) the Hoare annotation is: (and (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (<= 1 ULTIMATE.start_main_~r~0))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~a~0 1) .cse2 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~b~0 (* 2 (* ULTIMATE.start_main_~y~0 (div (* ULTIMATE.start_main_~a~0 (- 1)) (- 2))))) (= (mod ULTIMATE.start_main_~a~0 (- 2)) 0)))) (<= 1 ULTIMATE.start_main_~y~0) (= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~r~0 (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~y~0)))) [2021-10-28 09:23:37,138 INFO L857 garLoopResultBuilder]: For program point L15-18(lines 15 18) no Hoare annotation was computed. [2021-10-28 09:23:37,138 INFO L860 garLoopResultBuilder]: At program point L15-20(lines 14 20) the Hoare annotation is: true [2021-10-28 09:23:37,138 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-10-28 09:23:37,139 INFO L857 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-10-28 09:23:37,139 INFO L857 garLoopResultBuilder]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2021-10-28 09:23:37,139 INFO L857 garLoopResultBuilder]: For program point L16-2(lines 16 17) no Hoare annotation was computed. [2021-10-28 09:23:37,139 INFO L857 garLoopResultBuilder]: For program point L16-3(lines 16 17) no Hoare annotation was computed. [2021-10-28 09:23:37,139 INFO L857 garLoopResultBuilder]: For program point L16-4(lines 16 17) no Hoare annotation was computed. [2021-10-28 09:23:37,140 INFO L857 garLoopResultBuilder]: For program point L16-5(lines 16 17) no Hoare annotation was computed. [2021-10-28 09:23:37,140 INFO L857 garLoopResultBuilder]: For program point L16-6(lines 16 17) no Hoare annotation was computed. [2021-10-28 09:23:37,140 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:23:37,140 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-10-28 09:23:37,144 INFO L731 BasicCegarLoop]: Path program histogram: [6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:37,147 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:23:37,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:23:37 BoogieIcfgContainer [2021-10-28 09:23:37,202 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:23:37,202 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:23:37,203 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:23:37,203 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:23:37,204 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:20:45" (3/4) ... [2021-10-28 09:23:37,207 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:23:37,222 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-28 09:23:37,222 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:23:37,223 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:23:37,223 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:23:37,287 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:23:37,288 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:23:37,289 INFO L168 Benchmark]: Toolchain (without parser) took 172872.78 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 83.8 MB in the beginning and 88.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 45.7 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:37,289 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 113.2 MB. Free memory is still 66.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:23:37,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.79 ms. Allocated memory is still 113.2 MB. Free memory was 83.5 MB in the beginning and 88.7 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:37,291 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.97 ms. Allocated memory is still 113.2 MB. Free memory was 88.7 MB in the beginning and 87.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:37,291 INFO L168 Benchmark]: Boogie Preprocessor took 60.74 ms. Allocated memory is still 113.2 MB. Free memory was 87.1 MB in the beginning and 85.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:37,292 INFO L168 Benchmark]: RCFGBuilder took 466.48 ms. Allocated memory is still 113.2 MB. Free memory was 85.8 MB in the beginning and 74.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:37,292 INFO L168 Benchmark]: TraceAbstraction took 171783.69 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 74.2 MB in the beginning and 91.9 MB in the end (delta: -17.7 MB). Peak memory consumption was 97.8 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:37,293 INFO L168 Benchmark]: Witness Printer took 85.38 ms. Allocated memory is still 163.6 MB. Free memory was 91.9 MB in the beginning and 88.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:23:37,296 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 113.2 MB. Free memory is still 66.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 401.79 ms. Allocated memory is still 113.2 MB. Free memory was 83.5 MB in the beginning and 88.7 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.97 ms. Allocated memory is still 113.2 MB. Free memory was 88.7 MB in the beginning and 87.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.74 ms. Allocated memory is still 113.2 MB. Free memory was 87.1 MB in the beginning and 85.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 466.48 ms. Allocated memory is still 113.2 MB. Free memory was 85.8 MB in the beginning and 74.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 171783.69 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 74.2 MB in the beginning and 91.9 MB in the end (delta: -17.7 MB). Peak memory consumption was 97.8 MB. Max. memory is 16.1 GB. * Witness Printer took 85.38 ms. Allocated memory is still 163.6 MB. Free memory was 91.9 MB in the beginning and 88.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 171.6s, OverallIterations: 32, TraceHistogramMax: 7, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 93.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 39.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1055 SDtfs, 2386 SDslu, 3042 SDs, 0 SdLazy, 3476 SolverSat, 761 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 49.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1409 GetRequests, 1094 SyntacticMatches, 3 SemanticMatches, 312 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 48.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=172occurred in iteration=30, InterpolantAutomatonStates: 333, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 32 MinimizatonAttempts, 666 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 10 PreInvPairs, 129 NumberOfFragments, 540 HoareAnnotationTreeSize, 10 FomulaSimplifications, 705442293 FormulaSimplificationTreeSizeReduction, 2.6s HoareSimplificationTime, 10 FomulaSimplificationsInter, 15816567 FormulaSimplificationTreeSizeReductionInter, 36.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 18.4s InterpolantComputationTime, 1305 NumberOfCodeBlocks, 1106 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 1273 ConstructedInterpolants, 0 QuantifiedInterpolants, 8400 SizeOfPredicates, 195 NumberOfNonLiveVariables, 4422 ConjunctsInSsa, 523 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 369/1263 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 == cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((cond == 1 && 1 == cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 == cond) && a == 1) && 1 <= r) && b == y) || ((((cond == 1 && 1 == cond) && 1 <= r) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0)) && 1 <= y) && x == r + q * y - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 <= cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((cond == 1 && 1 <= cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((cond == 1 && 1 == cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((cond == 1 && 1 == cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((((cond == 1 && 1 == cond) && 1 <= y) && a == 1) && 1 <= r) && x == r + q * y) && b == y) || ((((((((cond == 1 && 1 <= cond) && q == 2) && x == r + 2 * y) && r < 2 * b) && counter <= 4) && a == 1) && 1 <= r) && b == y)) || ((((((cond == 1 && 1 == cond) && 1 <= y) && 1 <= r) && x == r + q * y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: (((((cond == 1 && 1 == cond) && 1 <= y) && b == a * y) && x == r + q * y) || ((((((x == r + y && cond == 1) && 1 <= cond) && r < y) && b <= y) && 1 <= y) && q == 1)) || ((((((((((cond == 1 && (-1 + r * -1) / -2 < y + 1) && 1 <= cond) && q == 2) && x == r + 2 * y) && counter <= 4) && 1 <= y) && 2 * y <= x) && b * -1 / -2 <= y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((cond == 1 && 1 <= y) && a == 1) && b == y) || (((cond == 1 && 1 <= y) && b == 2 * (y * (a * -1 / -2))) && a % -2 == 0)) && x == r + q * y - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((x == r + y && cond == 1) && r < y) && b <= y) && 1 <= y) && q == 1) || ((((cond == 1 && 1 == cond) && 1 <= y) && b == a * y) && x == r + q * y) RESULT: Ultimate proved your program to be correct! [2021-10-28 09:23:37,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b92bc471-1956-4000-9254-86d619bc271c/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...