./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro --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 e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:29:11,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:29:11,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:29:11,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:29:11,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:29:11,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:29:11,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:29:11,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:29:11,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:29:11,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:29:11,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:29:11,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:29:11,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:29:11,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:29:11,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:29:11,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:29:11,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:29:11,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:29:11,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:29:11,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:29:11,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:29:11,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:29:11,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:29:11,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:29:11,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:29:11,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:29:11,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:29:11,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:29:11,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:29:11,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:29:11,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:29:11,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:29:11,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:29:11,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:29:11,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:29:11,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:29:11,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:29:11,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:29:11,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:29:11,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:29:11,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:29:11,153 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:29:11,192 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:29:11,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:29:11,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:29:11,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:29:11,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:29:11,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:29:11,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:29:11,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:29:11,195 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:29:11,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:29:11,197 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:29:11,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:29:11,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:29:11,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:29:11,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:29:11,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:29:11,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:29:11,198 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:29:11,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:29:11,199 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:29:11,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:29:11,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:29:11,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:29:11,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:29:11,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:29:11,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:29:11,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:29:11,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:29:11,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:29:11,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:29:11,201 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:29:11,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:29:11,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:29:11,202 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_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6c0909fc593366247feb227b85c6733aa1dfc9c572e69f3a5aa951fa82d0326 [2022-11-18 20:29:11,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:29:11,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:29:11,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:29:11,570 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:29:11,573 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:29:11,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-11-18 20:29:11,655 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/data/22c201ee0/e10380adf6a5405b98a50ba6065b5977/FLAG143eca6b8 [2022-11-18 20:29:12,104 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:29:12,105 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/sv-benchmarks/c/array-crafted/zero_sum_const5.c [2022-11-18 20:29:12,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/data/22c201ee0/e10380adf6a5405b98a50ba6065b5977/FLAG143eca6b8 [2022-11-18 20:29:12,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/data/22c201ee0/e10380adf6a5405b98a50ba6065b5977 [2022-11-18 20:29:12,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:29:12,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:29:12,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:29:12,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:29:12,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:29:12,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:12,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297e5b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12, skipping insertion in model container [2022-11-18 20:29:12,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:12,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:29:12,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:29:12,794 WARN L234 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_24194c2b-dbb5-400a-93e8-40099fb313bd/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-11-18 20:29:12,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:29:12,851 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:29:12,869 WARN L234 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_24194c2b-dbb5-400a-93e8-40099fb313bd/sv-benchmarks/c/array-crafted/zero_sum_const5.c[406,419] [2022-11-18 20:29:12,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:29:12,919 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:29:12,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12 WrapperNode [2022-11-18 20:29:12,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:29:12,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:29:12,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:29:12,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:29:12,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:12,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:12,982 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 148 [2022-11-18 20:29:12,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:29:12,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:29:12,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:29:12,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:29:12,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:12,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:13,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:13,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:13,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:13,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:13,030 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:13,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:13,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:29:13,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:29:13,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:29:13,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:29:13,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (1/1) ... [2022-11-18 20:29:13,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:29:13,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:13,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:29:13,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:29:13,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:29:13,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:29:13,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:29:13,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:29:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:29:13,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:29:13,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:29:13,219 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:29:13,222 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:29:13,482 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:29:13,489 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:29:13,490 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-18 20:29:13,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:29:13 BoogieIcfgContainer [2022-11-18 20:29:13,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:29:13,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:29:13,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:29:13,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:29:13,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:29:12" (1/3) ... [2022-11-18 20:29:13,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e310ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:29:13, skipping insertion in model container [2022-11-18 20:29:13,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:29:12" (2/3) ... [2022-11-18 20:29:13,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e310ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:29:13, skipping insertion in model container [2022-11-18 20:29:13,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:29:13" (3/3) ... [2022-11-18 20:29:13,514 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2022-11-18 20:29:13,547 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:29:13,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:29:13,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:29:13,643 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@fa5d941, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:29:13,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:29:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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) [2022-11-18 20:29:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 20:29:13,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:13,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:13,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:13,668 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2022-11-18 20:29:13,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:13,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824129073] [2022-11-18 20:29:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:13,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:13,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:13,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824129073] [2022-11-18 20:29:13,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824129073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:13,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:13,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:29:13,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868680889] [2022-11-18 20:29:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:13,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:29:13,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:13,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:29:13,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:29:13,897 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2022-11-18 20:29:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:13,919 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2022-11-18 20:29:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:29:13,922 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 27 [2022-11-18 20:29:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:13,932 INFO L225 Difference]: With dead ends: 83 [2022-11-18 20:29:13,932 INFO L226 Difference]: Without dead ends: 39 [2022-11-18 20:29:13,936 INFO L412 NwaCegarLoop]: 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 [2022-11-18 20:29:13,940 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:13,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:29:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-18 20:29:13,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-18 20:29:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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) [2022-11-18 20:29:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-11-18 20:29:13,980 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2022-11-18 20:29:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:13,981 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-11-18 20:29:13,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2022-11-18 20:29:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-11-18 20:29:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 20:29:13,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:13,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:13,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:29:13,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2022-11-18 20:29:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:13,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968501916] [2022-11-18 20:29:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:13,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:14,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:14,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968501916] [2022-11-18 20:29:14,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968501916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:14,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:14,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:29:14,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319283954] [2022-11-18 20:29:14,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:14,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:29:14,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:14,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:29:14,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:29:14,203 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-11-18 20:29:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:14,330 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2022-11-18 20:29:14,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:29:14,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2022-11-18 20:29:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:14,332 INFO L225 Difference]: With dead ends: 75 [2022-11-18 20:29:14,332 INFO L226 Difference]: Without dead ends: 41 [2022-11-18 20:29:14,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:29:14,334 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:14,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:29:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-18 20:29:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-11-18 20:29:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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) [2022-11-18 20:29:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-11-18 20:29:14,341 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2022-11-18 20:29:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:14,342 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-11-18 20:29:14,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-11-18 20:29:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-11-18 20:29:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 20:29:14,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:14,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:14,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:29:14,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:14,345 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2022-11-18 20:29:14,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:14,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350585610] [2022-11-18 20:29:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:14,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:29:14,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350585610] [2022-11-18 20:29:14,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350585610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:29:14,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:29:14,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:29:14,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646291614] [2022-11-18 20:29:14,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:29:14,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:29:14,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:14,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:29:14,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:14,505 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-11-18 20:29:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:14,665 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2022-11-18 20:29:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:29:14,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 29 [2022-11-18 20:29:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:14,667 INFO L225 Difference]: With dead ends: 92 [2022-11-18 20:29:14,668 INFO L226 Difference]: Without dead ends: 61 [2022-11-18 20:29:14,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:29:14,670 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:14,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 19 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:29:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-18 20:29:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-11-18 20:29:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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) [2022-11-18 20:29:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-18 20:29:14,682 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2022-11-18 20:29:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:14,682 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-18 20:29:14,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2022-11-18 20:29:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-18 20:29:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:29:14,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:14,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:14,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:29:14,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2022-11-18 20:29:14,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:14,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333629958] [2022-11-18 20:29:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:14,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:29:14,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:14,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333629958] [2022-11-18 20:29:14,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333629958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:14,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902633549] [2022-11-18 20:29:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:14,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:14,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:14,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:14,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:29:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:15,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:29:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:29:15,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:29:15,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902633549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:15,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:15,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-18 20:29:15,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390591382] [2022-11-18 20:29:15,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:15,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:29:15,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:15,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:29:15,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:29:15,182 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2022-11-18 20:29:15,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:15,439 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2022-11-18 20:29:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:29:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 [2022-11-18 20:29:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:15,440 INFO L225 Difference]: With dead ends: 97 [2022-11-18 20:29:15,441 INFO L226 Difference]: Without dead ends: 53 [2022-11-18 20:29:15,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:29:15,444 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:15,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:29:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-18 20:29:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-11-18 20:29:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 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) [2022-11-18 20:29:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-11-18 20:29:15,455 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2022-11-18 20:29:15,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:15,455 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-11-18 20:29:15,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2022-11-18 20:29:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-11-18 20:29:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 20:29:15,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:15,458 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:15,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:15,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:15,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:15,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2022-11-18 20:29:15,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:15,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653188142] [2022-11-18 20:29:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:15,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:29:15,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:15,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653188142] [2022-11-18 20:29:15,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653188142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:15,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617091663] [2022-11-18 20:29:15,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:15,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:15,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:15,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:15,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:29:16,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:16,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:16,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:29:16,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:29:16,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:29:16,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617091663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:16,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:16,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-18 20:29:16,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208442919] [2022-11-18 20:29:16,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:16,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:29:16,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:16,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:29:16,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:29:16,364 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2022-11-18 20:29:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:16,582 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2022-11-18 20:29:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:29:16,583 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 51 [2022-11-18 20:29:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:16,590 INFO L225 Difference]: With dead ends: 123 [2022-11-18 20:29:16,590 INFO L226 Difference]: Without dead ends: 83 [2022-11-18 20:29:16,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:29:16,603 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:16,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 22 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:29:16,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-18 20:29:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2022-11-18 20:29:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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) [2022-11-18 20:29:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-18 20:29:16,629 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2022-11-18 20:29:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:16,629 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-18 20:29:16,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2022-11-18 20:29:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-18 20:29:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 20:29:16,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:16,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:16,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:16,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:16,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2022-11-18 20:29:16,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:16,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678085429] [2022-11-18 20:29:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:25,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:25,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678085429] [2022-11-18 20:29:25,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678085429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:25,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724298362] [2022-11-18 20:29:25,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:29:25,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:25,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:25,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:25,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:29:25,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:29:25,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:25,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-18 20:29:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:28,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:29:28,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2022-11-18 20:29:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:28,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:37,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:29:37,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 76 [2022-11-18 20:29:38,031 INFO L321 Elim1Store]: treesize reduction 58, result has 13.4 percent of original size [2022-11-18 20:29:38,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 17 [2022-11-18 20:29:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:41,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724298362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:41,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:41,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 29] total 62 [2022-11-18 20:29:41,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106080461] [2022-11-18 20:29:41,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:41,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 20:29:41,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:41,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 20:29:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3406, Unknown=1, NotChecked=0, Total=3782 [2022-11-18 20:29:41,556 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 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) [2022-11-18 20:29:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:52,861 INFO L93 Difference]: Finished difference Result 198 states and 228 transitions. [2022-11-18 20:29:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 20:29:52,862 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 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 71 [2022-11-18 20:29:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:52,865 INFO L225 Difference]: With dead ends: 198 [2022-11-18 20:29:52,865 INFO L226 Difference]: Without dead ends: 192 [2022-11-18 20:29:52,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 109 SyntacticMatches, 44 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=1105, Invalid=10024, Unknown=1, NotChecked=0, Total=11130 [2022-11-18 20:29:52,872 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 122 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1262 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:52,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 129 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 555 Invalid, 0 Unknown, 1262 Unchecked, 0.6s Time] [2022-11-18 20:29:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-18 20:29:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 125. [2022-11-18 20:29:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 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) [2022-11-18 20:29:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2022-11-18 20:29:52,906 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2022-11-18 20:29:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:52,906 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2022-11-18 20:29:52,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 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) [2022-11-18 20:29:52,907 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2022-11-18 20:29:52,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 20:29:52,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:52,909 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:52,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 20:29:53,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:53,113 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:53,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2022-11-18 20:29:53,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:53,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892138666] [2022-11-18 20:29:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:53,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:29:53,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:53,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892138666] [2022-11-18 20:29:53,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892138666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:53,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952656828] [2022-11-18 20:29:53,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:29:53,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:53,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:53,344 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:53,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:29:53,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:29:53,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:53,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:29:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:29:53,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:29:53,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952656828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:53,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:53,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-18 20:29:53,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247616089] [2022-11-18 20:29:53,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:53,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:29:53,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:29:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:29:53,721 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) [2022-11-18 20:29:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:54,299 INFO L93 Difference]: Finished difference Result 289 states and 334 transitions. [2022-11-18 20:29:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:29:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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 [2022-11-18 20:29:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:54,301 INFO L225 Difference]: With dead ends: 289 [2022-11-18 20:29:54,301 INFO L226 Difference]: Without dead ends: 168 [2022-11-18 20:29:54,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 136 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:29:54,302 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 184 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:54,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 43 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:29:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-18 20:29:54,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 140. [2022-11-18 20:29:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 139 states have internal predecessors, (158), 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) [2022-11-18 20:29:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2022-11-18 20:29:54,331 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 73 [2022-11-18 20:29:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:54,332 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2022-11-18 20:29:54,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) [2022-11-18 20:29:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2022-11-18 20:29:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-18 20:29:54,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:54,336 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:54,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:54,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:29:54,544 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1072452492, now seen corresponding path program 5 times [2022-11-18 20:29:54,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:54,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628843707] [2022-11-18 20:29:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:54,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 20:29:54,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:54,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628843707] [2022-11-18 20:29:54,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628843707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:54,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005047940] [2022-11-18 20:29:54,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:29:54,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:54,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:54,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:54,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:29:54,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:29:54,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:54,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:29:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 20:29:55,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 20:29:55,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005047940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:55,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:55,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-18 20:29:55,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200652677] [2022-11-18 20:29:55,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:55,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:29:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:55,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:29:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:29:55,238 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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) [2022-11-18 20:29:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:55,737 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2022-11-18 20:29:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:29:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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 75 [2022-11-18 20:29:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:55,738 INFO L225 Difference]: With dead ends: 156 [2022-11-18 20:29:55,739 INFO L226 Difference]: Without dead ends: 104 [2022-11-18 20:29:55,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:29:55,740 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 179 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:55,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 31 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:29:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-18 20:29:55,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-11-18 20:29:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 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) [2022-11-18 20:29:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2022-11-18 20:29:55,760 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2022-11-18 20:29:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:55,767 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2022-11-18 20:29:55,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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) [2022-11-18 20:29:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2022-11-18 20:29:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-18 20:29:55,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:55,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:55,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:55,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:55,977 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:29:55,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:55,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2022-11-18 20:29:55,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:55,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571416815] [2022-11-18 20:29:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:55,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:13,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:13,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571416815] [2022-11-18 20:30:13,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571416815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:13,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747498863] [2022-11-18 20:30:13,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:30:13,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:13,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:13,211 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:13,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:30:13,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-18 20:30:13,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:13,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 150 conjunts are in the unsatisfiable core [2022-11-18 20:30:13,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:13,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:30:13,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-18 20:30:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:26,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:26,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:26,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:30:26,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:30:26,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:30:26,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:30:26,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:26,308 INFO L321 Elim1Store]: treesize reduction 65, result has 43.0 percent of original size [2022-11-18 20:30:26,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 65 treesize of output 65 [2022-11-18 20:30:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:26,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:35,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2022-11-18 20:36:35,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:36:35,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 7969 treesize of output 6553 [2022-11-18 20:36:40,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 91 [2022-11-18 20:36:40,242 INFO L321 Elim1Store]: treesize reduction 48, result has 15.8 percent of original size [2022-11-18 20:36:40,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6626 treesize of output 5162 [2022-11-18 20:38:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 1 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:01,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747498863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:01,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:01,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 45, 60] total 157 [2022-11-18 20:38:01,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969187661] [2022-11-18 20:38:01,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:01,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-11-18 20:38:01,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:01,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-11-18 20:38:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1651, Invalid=22765, Unknown=76, NotChecked=0, Total=24492 [2022-11-18 20:38:01,175 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 157 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 157 states have internal predecessors, (267), 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) [2022-11-18 20:38:51,920 WARN L233 SmtUtils]: Spent 12.16s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:39:12,454 WARN L233 SmtUtils]: Spent 7.03s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:39:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:54,072 INFO L93 Difference]: Finished difference Result 256 states and 286 transitions. [2022-11-18 20:39:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-18 20:39:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 157 states have internal predecessors, (267), 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 93 [2022-11-18 20:39:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:54,075 INFO L225 Difference]: With dead ends: 256 [2022-11-18 20:39:54,075 INFO L226 Difference]: Without dead ends: 250 [2022-11-18 20:39:54,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 75 SyntacticMatches, 38 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16385 ImplicationChecksByTransitivity, 492.7s TimeCoverageRelationStatistics Valid=2207, Invalid=33230, Unknown=95, NotChecked=0, Total=35532 [2022-11-18 20:39:54,082 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1551 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:54,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 251 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 444 Invalid, 0 Unknown, 1551 Unchecked, 0.5s Time] [2022-11-18 20:39:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-18 20:39:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 163. [2022-11-18 20:39:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.123456790123457) internal successors, (182), 162 states have internal predecessors, (182), 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) [2022-11-18 20:39:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 182 transitions. [2022-11-18 20:39:54,132 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 182 transitions. Word has length 93 [2022-11-18 20:39:54,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:54,132 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 182 transitions. [2022-11-18 20:39:54,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.7006369426751593) internal successors, (267), 157 states have internal predecessors, (267), 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) [2022-11-18 20:39:54,133 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 182 transitions. [2022-11-18 20:39:54,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-18 20:39:54,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:54,134 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:54,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:54,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:54,343 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:54,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:54,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1592040608, now seen corresponding path program 7 times [2022-11-18 20:39:54,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:54,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824803754] [2022-11-18 20:39:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:54,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:39:54,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:54,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824803754] [2022-11-18 20:39:54,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824803754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:54,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710320886] [2022-11-18 20:39:54,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:39:54,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:54,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:54,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:54,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:39:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:54,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:39:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:39:54,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:39:55,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710320886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:55,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:55,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-18 20:39:55,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504534885] [2022-11-18 20:39:55,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:55,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:39:55,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:55,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:39:55,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:39:55,019 INFO L87 Difference]: Start difference. First operand 163 states and 182 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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) [2022-11-18 20:39:55,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:55,743 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2022-11-18 20:39:55,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:39:55,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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 95 [2022-11-18 20:39:55,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:55,744 INFO L225 Difference]: With dead ends: 365 [2022-11-18 20:39:55,744 INFO L226 Difference]: Without dead ends: 206 [2022-11-18 20:39:55,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:39:55,746 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 225 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:55,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 50 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:39:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-18 20:39:55,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 178. [2022-11-18 20:39:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1073446327683616) internal successors, (196), 177 states have internal predecessors, (196), 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) [2022-11-18 20:39:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2022-11-18 20:39:55,779 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 95 [2022-11-18 20:39:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:55,779 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2022-11-18 20:39:55,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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) [2022-11-18 20:39:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2022-11-18 20:39:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-18 20:39:55,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:55,780 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:55,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:55,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:39:55,986 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:55,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:55,986 INFO L85 PathProgramCache]: Analyzing trace with hash -345123774, now seen corresponding path program 8 times [2022-11-18 20:39:55,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:55,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175863443] [2022-11-18 20:39:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:55,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 20:39:56,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:56,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175863443] [2022-11-18 20:39:56,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175863443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:56,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68235700] [2022-11-18 20:39:56,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:39:56,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:56,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:56,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:56,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:39:56,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:39:56,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:39:56,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:39:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 20:39:56,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 20:39:56,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68235700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:56,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:56,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-18 20:39:56,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654986922] [2022-11-18 20:39:56,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:56,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:39:56,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:56,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:39:56,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:39:56,526 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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) [2022-11-18 20:39:57,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:57,225 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2022-11-18 20:39:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:39:57,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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 97 [2022-11-18 20:39:57,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:57,227 INFO L225 Difference]: With dead ends: 194 [2022-11-18 20:39:57,227 INFO L226 Difference]: Without dead ends: 126 [2022-11-18 20:39:57,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 180 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:39:57,228 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 217 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:57,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 33 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:39:57,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-18 20:39:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2022-11-18 20:39:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 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) [2022-11-18 20:39:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-11-18 20:39:57,245 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2022-11-18 20:39:57,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:57,247 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-11-18 20:39:57,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 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) [2022-11-18 20:39:57,247 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-11-18 20:39:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-18 20:39:57,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:57,248 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:57,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:57,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:57,456 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 9 times [2022-11-18 20:39:57,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:57,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043743171] [2022-11-18 20:39:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:57,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:19,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:40:19,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043743171] [2022-11-18 20:40:19,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043743171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:40:19,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615787418] [2022-11-18 20:40:19,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:40:19,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:19,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:40:19,575 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:40:19,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:40:19,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:40:19,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:40:19,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 187 conjunts are in the unsatisfiable core [2022-11-18 20:40:19,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:19,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:40:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:35,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:40:35,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 47 [2022-11-18 20:40:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 7 proven. 160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:40:35,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:40:54,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615787418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:40:54,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:40:54,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 26, 21] total 113 [2022-11-18 20:40:54,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199913224] [2022-11-18 20:40:54,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:40:54,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-18 20:40:54,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:40:54,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-18 20:40:54,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=11973, Unknown=1, NotChecked=0, Total=12656 [2022-11-18 20:40:54,201 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 113 states, 113 states have (on average 2.911504424778761) internal successors, (329), 113 states have internal predecessors, (329), 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) [2022-11-18 20:41:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:37,432 INFO L93 Difference]: Finished difference Result 359 states and 396 transitions. [2022-11-18 20:41:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-18 20:41:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.911504424778761) internal successors, (329), 113 states have internal predecessors, (329), 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 115 [2022-11-18 20:41:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:37,434 INFO L225 Difference]: With dead ends: 359 [2022-11-18 20:41:37,434 INFO L226 Difference]: Without dead ends: 263 [2022-11-18 20:41:37,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 173 SyntacticMatches, 63 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 14797 ImplicationChecksByTransitivity, 78.3s TimeCoverageRelationStatistics Valid=3017, Invalid=41290, Unknown=3, NotChecked=0, Total=44310 [2022-11-18 20:41:37,440 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 245 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 3327 mSolverCounterSat, 966 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 6190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 966 IncrementalHoareTripleChecker+Valid, 3327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1897 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:37,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 228 Invalid, 6190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [966 Valid, 3327 Invalid, 0 Unknown, 1897 Unchecked, 4.6s Time] [2022-11-18 20:41:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-18 20:41:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 215. [2022-11-18 20:41:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.102803738317757) internal successors, (236), 214 states have internal predecessors, (236), 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) [2022-11-18 20:41:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 236 transitions. [2022-11-18 20:41:37,477 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 236 transitions. Word has length 115 [2022-11-18 20:41:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:37,477 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 236 transitions. [2022-11-18 20:41:37,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.911504424778761) internal successors, (329), 113 states have internal predecessors, (329), 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) [2022-11-18 20:41:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 236 transitions. [2022-11-18 20:41:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-18 20:41:37,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:37,479 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:37,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:41:37,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:41:37,682 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:41:37,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash 154504470, now seen corresponding path program 10 times [2022-11-18 20:41:37,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:37,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384981155] [2022-11-18 20:41:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:37,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-18 20:41:37,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:37,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384981155] [2022-11-18 20:41:37,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384981155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:37,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315363054] [2022-11-18 20:41:37,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:41:37,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:37,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:37,963 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:41:37,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:41:38,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:41:38,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:41:38,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:41:38,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-18 20:41:38,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-18 20:41:38,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315363054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:41:38,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:41:38,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-18 20:41:38,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891724833] [2022-11-18 20:41:38,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:38,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:41:38,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:38,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:41:38,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:41:38,583 INFO L87 Difference]: Start difference. First operand 215 states and 236 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 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) [2022-11-18 20:41:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:39,450 INFO L93 Difference]: Finished difference Result 485 states and 534 transitions. [2022-11-18 20:41:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:41:39,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 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) Word has length 117 [2022-11-18 20:41:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:39,453 INFO L225 Difference]: With dead ends: 485 [2022-11-18 20:41:39,453 INFO L226 Difference]: Without dead ends: 211 [2022-11-18 20:41:39,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 218 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:41:39,455 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 317 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:39,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 52 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:41:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-18 20:41:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 186. [2022-11-18 20:41:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0864864864864865) internal successors, (201), 185 states have internal predecessors, (201), 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) [2022-11-18 20:41:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2022-11-18 20:41:39,492 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 117 [2022-11-18 20:41:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:39,492 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2022-11-18 20:41:39,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 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) [2022-11-18 20:41:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2022-11-18 20:41:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-18 20:41:39,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:39,495 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:39,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:41:39,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:41:39,701 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:41:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:39,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1769140834, now seen corresponding path program 11 times [2022-11-18 20:41:39,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:39,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674322349] [2022-11-18 20:41:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:39,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-18 20:41:40,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:40,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674322349] [2022-11-18 20:41:40,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674322349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:40,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089869170] [2022-11-18 20:41:40,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:41:40,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:40,031 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:41:40,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:41:40,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-18 20:41:40,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:41:40,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:41:40,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-18 20:41:40,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-18 20:41:40,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089869170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:41:40,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:41:40,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-18 20:41:40,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679375199] [2022-11-18 20:41:40,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:40,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:41:40,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:40,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:41:40,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:41:40,885 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 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) [2022-11-18 20:41:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:41,624 INFO L93 Difference]: Finished difference Result 202 states and 217 transitions. [2022-11-18 20:41:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:41:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 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 125 [2022-11-18 20:41:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:41,626 INFO L225 Difference]: With dead ends: 202 [2022-11-18 20:41:41,627 INFO L226 Difference]: Without dead ends: 148 [2022-11-18 20:41:41,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 233 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:41:41,628 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 281 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:41,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 33 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:41:41,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-18 20:41:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2022-11-18 20:41:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 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) [2022-11-18 20:41:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2022-11-18 20:41:41,651 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 125 [2022-11-18 20:41:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:41,651 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2022-11-18 20:41:41,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 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) [2022-11-18 20:41:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2022-11-18 20:41:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-18 20:41:41,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:41,653 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:41,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:41:41,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:41:41,854 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:41:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:41,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1639815466, now seen corresponding path program 12 times [2022-11-18 20:41:41,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:41,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493133696] [2022-11-18 20:41:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 10 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:18,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:18,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493133696] [2022-11-18 20:42:18,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493133696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:42:18,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042466487] [2022-11-18 20:42:18,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:42:18,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:42:18,074 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:42:18,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194c2b-dbb5-400a-93e8-40099fb313bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:42:18,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 20:42:18,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:42:18,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 233 conjunts are in the unsatisfiable core [2022-11-18 20:42:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:18,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:42:29,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:42:29,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2022-11-18 20:42:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 3 proven. 271 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:42:30,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:43:00,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042466487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:00,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:43:00,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 32, 25] total 134 [2022-11-18 20:43:00,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678730613] [2022-11-18 20:43:00,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:00,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-11-18 20:43:00,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-11-18 20:43:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=17138, Unknown=0, NotChecked=0, Total=17822 [2022-11-18 20:43:00,535 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 134 states, 134 states have (on average 2.9402985074626864) internal successors, (394), 134 states have internal predecessors, (394), 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)