./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8 --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 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 --- 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-e04fb08 [2022-11-16 11:03:08,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:03:08,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:03:08,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:03:08,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:03:08,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:03:08,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:03:08,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:03:08,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:03:08,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:03:08,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:03:08,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:03:08,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:03:08,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:03:08,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:03:08,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:03:08,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:03:08,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:03:08,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:03:08,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:03:08,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:03:08,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:03:08,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:03:08,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:03:08,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:03:08,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:03:08,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:03:08,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:03:08,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:03:08,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:03:08,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:03:08,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:03:08,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:03:08,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:03:08,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:03:08,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:03:08,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:03:08,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:03:08,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:03:08,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:03:08,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:03:08,680 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:03:08,719 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:03:08,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:03:08,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:03:08,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:03:08,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:03:08,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:03:08,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:03:08,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:03:08,727 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:03:08,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:03:08,728 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:03:08,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:03:08,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:03:08,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:03:08,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:03:08,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:03:08,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:03:08,730 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:03:08,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:03:08,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:03:08,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:03:08,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:03:08,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:03:08,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:03:08,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:03:08,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:03:08,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:03:08,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:03:08,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:03:08,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:03:08,735 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:03:08,735 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:03:08,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:03:08,736 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_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 [2022-11-16 11:03:09,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:03:09,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:03:09,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:03:09,104 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:03:09,104 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:03:09,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-11-16 11:03:09,177 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/data/6a028a9d4/1636d1d6e185447da5f76da275bc72fd/FLAGbbd5eddc7 [2022-11-16 11:03:09,738 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:03:09,738 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-11-16 11:03:09,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/data/6a028a9d4/1636d1d6e185447da5f76da275bc72fd/FLAGbbd5eddc7 [2022-11-16 11:03:10,108 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/data/6a028a9d4/1636d1d6e185447da5f76da275bc72fd [2022-11-16 11:03:10,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:03:10,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:03:10,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:03:10,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:03:10,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:03:10,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32575405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10, skipping insertion in model container [2022-11-16 11:03:10,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:03:10,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:03:10,354 WARN L229 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_e0ab277a-c815-489c-92f5-013150020e98/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2022-11-16 11:03:10,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:03:10,375 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:03:10,386 WARN L229 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_e0ab277a-c815-489c-92f5-013150020e98/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2022-11-16 11:03:10,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:03:10,406 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:03:10,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10 WrapperNode [2022-11-16 11:03:10,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:03:10,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:03:10,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:03:10,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:03:10,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,440 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-11-16 11:03:10,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:03:10,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:03:10,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:03:10,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:03:10,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,471 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:03:10,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:03:10,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:03:10,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:03:10,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (1/1) ... [2022-11-16 11:03:10,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:03:10,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:10,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:03:10,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:03:10,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:03:10,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:03:10,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:03:10,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:03:10,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 11:03:10,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 11:03:10,648 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:03:10,654 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:03:10,874 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:03:10,881 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:03:10,881 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:03:10,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:03:10 BoogieIcfgContainer [2022-11-16 11:03:10,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:03:10,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:03:10,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:03:10,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:03:10,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:03:10" (1/3) ... [2022-11-16 11:03:10,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15629b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:03:10, skipping insertion in model container [2022-11-16 11:03:10,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:03:10" (2/3) ... [2022-11-16 11:03:10,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15629b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:03:10, skipping insertion in model container [2022-11-16 11:03:10,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:03:10" (3/3) ... [2022-11-16 11:03:10,894 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2022-11-16 11:03:10,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:03:10,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:03:11,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:03:11,055 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;@2d03192, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:03:11,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:03:11,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:03:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:03:11,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:11,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:11,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:03:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2022-11-16 11:03:11,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:11,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31329789] [2022-11-16 11:03:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:11,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:11,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:11,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31329789] [2022-11-16 11:03:11,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 11:03:11,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292930012] [2022-11-16 11:03:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:11,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:11,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:11,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:03:11,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:03:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 11:03:11,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:11,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:11,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292930012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:11,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:11,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:03:11,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151428896] [2022-11-16 11:03:11,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:11,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:03:11,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:11,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:03:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:03:11,455 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:11,494 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-11-16 11:03:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:03:11,497 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:03:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:11,514 INFO L225 Difference]: With dead ends: 35 [2022-11-16 11:03:11,515 INFO L226 Difference]: Without dead ends: 15 [2022-11-16 11:03:11,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:03:11,526 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2022-11-16 11:03:11,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:03:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-16 11:03:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-16 11:03:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:03:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-16 11:03:11,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-11-16 11:03:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:11,574 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-16 11:03:11,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-16 11:03:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:03:11,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:11,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:11,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:11,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:11,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:03:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2022-11-16 11:03:11,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:11,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135241045] [2022-11-16 11:03:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:11,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:03:11,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866628966] [2022-11-16 11:03:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:11,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:11,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:11,814 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:03:11,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:03:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:11,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:03:11,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:12,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:03:12,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:12,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135241045] [2022-11-16 11:03:12,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:03:12,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866628966] [2022-11-16 11:03:12,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866628966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:03:12,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:03:12,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:03:12,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736431675] [2022-11-16 11:03:12,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:03:12,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:03:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:03:12,026 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:12,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:12,123 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-16 11:03:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:03:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:03:12,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:12,131 INFO L225 Difference]: With dead ends: 26 [2022-11-16 11:03:12,132 INFO L226 Difference]: Without dead ends: 22 [2022-11-16 11:03:12,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:03:12,134 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:12,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:03:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-16 11:03:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-16 11:03:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:03:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-16 11:03:12,149 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2022-11-16 11:03:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:12,149 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-16 11:03:12,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:03:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-16 11:03:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:03:12,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:12,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:12,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:12,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:12,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:03:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:12,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2022-11-16 11:03:12,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:12,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16048676] [2022-11-16 11:03:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:12,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:12,368 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:03:12,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935572370] [2022-11-16 11:03:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:12,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:12,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:12,370 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:03:12,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:03:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:12,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:03:12,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:12,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:03:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:12,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:12,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16048676] [2022-11-16 11:03:12,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:03:12,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935572370] [2022-11-16 11:03:12,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935572370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:03:12,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:03:12,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-11-16 11:03:12,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730288374] [2022-11-16 11:03:12,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:03:12,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:03:12,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:12,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:03:12,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:03:12,894 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:03:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:13,278 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-11-16 11:03:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:03:13,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-16 11:03:13,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:13,279 INFO L225 Difference]: With dead ends: 33 [2022-11-16 11:03:13,280 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 11:03:13,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:03:13,281 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:13,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:03:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 11:03:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-11-16 11:03:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:03:13,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-11-16 11:03:13,292 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2022-11-16 11:03:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:13,293 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-11-16 11:03:13,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:03:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-11-16 11:03:13,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:03:13,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:13,294 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:03:13,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:13,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:13,500 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:03:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:13,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2022-11-16 11:03:13,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:13,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870838548] [2022-11-16 11:03:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:13,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:13,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:03:13,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929454652] [2022-11-16 11:03:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:13,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:13,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:13,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:03:13,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:03:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:13,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:03:13,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:03:13,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:03:17,953 WARN L833 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:03:38,127 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) 4) 0)))) is different from true [2022-11-16 11:03:56,238 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:04:02,329 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:04:04,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:04,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870838548] [2022-11-16 11:04:04,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:04:04,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929454652] [2022-11-16 11:04:04,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929454652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:04,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:04:04,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-16 11:04:04,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441543265] [2022-11-16 11:04:04,367 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:04,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:04:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:04,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:04:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=107, Unknown=4, NotChecked=92, Total=240 [2022-11-16 11:04:04,369 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:04:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:04,518 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-11-16 11:04:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:04:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-16 11:04:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:04,520 INFO L225 Difference]: With dead ends: 31 [2022-11-16 11:04:04,520 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 11:04:04,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=56, Invalid=166, Unknown=4, NotChecked=116, Total=342 [2022-11-16 11:04:04,522 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:04,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:04:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 11:04:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-16 11:04:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:04:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-11-16 11:04:04,531 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-11-16 11:04:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:04,532 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-11-16 11:04:04,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:04:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-11-16 11:04:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:04:04,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:04,533 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:04,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:04,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:04,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:04,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:04,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2022-11-16 11:04:04,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:04,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114490474] [2022-11-16 11:04:04,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:04,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:04,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:04:04,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181818625] [2022-11-16 11:04:04,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:04:04,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:04,763 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:04,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:04:04,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:04:04,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:04:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:04:04,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:04:05,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:09,260 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:04:09,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:09,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114490474] [2022-11-16 11:04:09,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:04:09,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181818625] [2022-11-16 11:04:09,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181818625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:09,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:04:09,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-16 11:04:09,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933322382] [2022-11-16 11:04:09,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:09,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:04:09,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:09,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:04:09,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2022-11-16 11:04:09,267 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:04:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:09,443 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-11-16 11:04:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:04:09,444 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-11-16 11:04:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:09,445 INFO L225 Difference]: With dead ends: 34 [2022-11-16 11:04:09,445 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 11:04:09,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2022-11-16 11:04:09,446 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:09,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:04:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 11:04:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-16 11:04:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 11:04:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-16 11:04:09,457 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-11-16 11:04:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:09,457 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-16 11:04:09,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:04:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-16 11:04:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:04:09,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:09,459 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:09,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:09,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:09,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:09,667 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2022-11-16 11:04:09,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:09,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983767201] [2022-11-16 11:04:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:09,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:09,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:04:09,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274074975] [2022-11-16 11:04:09,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:04:09,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:09,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:09,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:09,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:04:09,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:04:09,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:04:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:04:09,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:04:09,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:04:10,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:10,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983767201] [2022-11-16 11:04:10,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:04:10,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274074975] [2022-11-16 11:04:10,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274074975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:10,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:04:10,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2022-11-16 11:04:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500620998] [2022-11-16 11:04:10,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:10,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:04:10,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:10,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:04:10,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:04:10,327 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:04:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:11,427 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-11-16 11:04:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:04:11,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2022-11-16 11:04:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:11,429 INFO L225 Difference]: With dead ends: 47 [2022-11-16 11:04:11,429 INFO L226 Difference]: Without dead ends: 41 [2022-11-16 11:04:11,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:04:11,460 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:11,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 126 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:04:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-16 11:04:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-16 11:04:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:04:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-16 11:04:11,494 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 36 [2022-11-16 11:04:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:11,498 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-16 11:04:11,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:04:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-16 11:04:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:04:11,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:11,504 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:11,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:11,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:11,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:11,711 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 4 times [2022-11-16 11:04:11,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:11,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86794441] [2022-11-16 11:04:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:11,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:11,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:04:11,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558179234] [2022-11-16 11:04:11,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:04:11,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:11,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:11,740 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:11,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:04:11,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:04:11,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:04:11,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 11:04:11,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-16 11:04:12,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:48,335 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18|))))) is different from true [2022-11-16 11:05:06,406 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:05:12,482 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:05:14,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:14,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86794441] [2022-11-16 11:05:14,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:05:14,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558179234] [2022-11-16 11:05:14,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558179234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:14,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:05:14,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-16 11:05:14,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517818285] [2022-11-16 11:05:14,514 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:14,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:05:14,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:14,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:05:14,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=291, Unknown=9, NotChecked=108, Total=462 [2022-11-16 11:05:14,515 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:05:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:14,964 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-11-16 11:05:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:05:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 64 [2022-11-16 11:05:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:14,966 INFO L225 Difference]: With dead ends: 49 [2022-11-16 11:05:14,966 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 11:05:14,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=74, Invalid=391, Unknown=9, NotChecked=126, Total=600 [2022-11-16 11:05:14,967 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:14,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 186 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:05:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 11:05:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-16 11:05:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:05:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-11-16 11:05:14,988 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2022-11-16 11:05:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:14,988 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-11-16 11:05:14,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:05:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-11-16 11:05:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 11:05:14,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:14,990 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:14,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 11:05:15,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:15,196 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:15,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 5 times [2022-11-16 11:05:15,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:15,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361320708] [2022-11-16 11:05:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:15,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:15,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:05:15,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449372868] [2022-11-16 11:05:15,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:05:15,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:15,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:15,226 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:15,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:05:15,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-16 11:05:15,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 11:05:15,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 20 proven. 130 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-16 11:05:15,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:15,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:15,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361320708] [2022-11-16 11:05:15,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:05:15,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449372868] [2022-11-16 11:05:15,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449372868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:15,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:05:15,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-16 11:05:15,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669761274] [2022-11-16 11:05:15,902 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:15,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:05:15,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:15,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:05:15,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:05:15,904 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:05:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:16,439 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-11-16 11:05:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:05:16,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2022-11-16 11:05:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:16,442 INFO L225 Difference]: With dead ends: 52 [2022-11-16 11:05:16,442 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 11:05:16,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:05:16,444 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:16,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 214 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:05:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 11:05:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-16 11:05:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:05:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-16 11:05:16,464 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2022-11-16 11:05:16,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:16,464 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-16 11:05:16,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:05:16,465 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-16 11:05:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:05:16,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:16,466 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:16,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:16,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:05:16,671 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:16,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 6 times [2022-11-16 11:05:16,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:16,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253522787] [2022-11-16 11:05:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:16,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:16,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:05:16,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015541086] [2022-11-16 11:05:16,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:05:16,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:16,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:16,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:16,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:05:17,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-16 11:05:17,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:17,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:05:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 28 proven. 154 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-16 11:05:17,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:17,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253522787] [2022-11-16 11:05:17,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:05:17,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015541086] [2022-11-16 11:05:17,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015541086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:17,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:05:17,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-16 11:05:17,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390830791] [2022-11-16 11:05:17,591 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:17,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:05:17,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:17,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:05:17,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:05:17,593 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:05:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:18,172 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-11-16 11:05:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:05:18,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 78 [2022-11-16 11:05:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:18,174 INFO L225 Difference]: With dead ends: 55 [2022-11-16 11:05:18,174 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 11:05:18,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:05:18,175 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:18,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 244 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:05:18,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 11:05:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-16 11:05:18,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 11:05:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-11-16 11:05:18,198 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2022-11-16 11:05:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:18,199 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-11-16 11:05:18,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:05:18,199 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-11-16 11:05:18,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-16 11:05:18,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:18,208 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:18,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 11:05:18,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:18,415 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:18,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 7 times [2022-11-16 11:05:18,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:18,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383118213] [2022-11-16 11:05:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:18,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:18,439 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:05:18,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722931181] [2022-11-16 11:05:18,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:05:18,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:18,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:18,464 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:18,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:05:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:18,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 11:05:18,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 51 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 11:05:18,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:23,153 WARN L833 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:05:39,228 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| Int)) (or (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 3)) 4)) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|))))) is different from true [2022-11-16 11:05:57,288 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| Int)) (or (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 3)) 4)) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:06:03,332 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:06:05,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:05,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383118213] [2022-11-16 11:06:05,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:06:05,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722931181] [2022-11-16 11:06:05,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722931181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:05,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:06:05,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-16 11:06:05,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499910980] [2022-11-16 11:06:05,360 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:05,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:06:05,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:05,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:06:05,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=377, Unknown=4, NotChecked=164, Total=600 [2022-11-16 11:06:05,362 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 11:06:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:05,974 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-11-16 11:06:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:06:05,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 85 [2022-11-16 11:06:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:05,976 INFO L225 Difference]: With dead ends: 58 [2022-11-16 11:06:05,976 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 11:06:05,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=74, Invalid=490, Unknown=4, NotChecked=188, Total=756 [2022-11-16 11:06:05,978 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:05,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 260 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:06:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 11:06:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-16 11:06:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 11:06:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-11-16 11:06:05,999 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2022-11-16 11:06:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:06,000 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-11-16 11:06:06,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 11:06:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-11-16 11:06:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 11:06:06,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:06,002 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:06,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:06,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:06:06,209 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:06,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:06,210 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 8 times [2022-11-16 11:06:06,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:06,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869621442] [2022-11-16 11:06:06,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:06,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:06,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:06:06,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344532217] [2022-11-16 11:06:06,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:06,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:06,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:06,226 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:06,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:06:06,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:06:06,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:06,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 11:06:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 53 proven. 202 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-16 11:06:06,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:11,059 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:06:11,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:11,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869621442] [2022-11-16 11:06:11,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:06:11,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344532217] [2022-11-16 11:06:11,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344532217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:11,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:06:11,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-11-16 11:06:11,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512114291] [2022-11-16 11:06:11,062 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:11,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:06:11,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:11,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:06:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=445, Unknown=1, NotChecked=42, Total=552 [2022-11-16 11:06:11,064 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 11:06:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:11,770 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-11-16 11:06:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:06:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 92 [2022-11-16 11:06:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:11,771 INFO L225 Difference]: With dead ends: 61 [2022-11-16 11:06:11,772 INFO L226 Difference]: Without dead ends: 56 [2022-11-16 11:06:11,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=83, Invalid=570, Unknown=1, NotChecked=48, Total=702 [2022-11-16 11:06:11,773 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:11,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 310 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:06:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-16 11:06:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-16 11:06:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 11:06:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-11-16 11:06:11,793 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 92 [2022-11-16 11:06:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:11,794 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-11-16 11:06:11,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 11:06:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-11-16 11:06:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-16 11:06:11,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:11,796 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:11,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:12,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:06:12,008 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash 550859009, now seen corresponding path program 9 times [2022-11-16 11:06:12,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:12,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261537863] [2022-11-16 11:06:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:12,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:12,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:06:12,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701818518] [2022-11-16 11:06:12,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:12,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:12,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:12,041 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:12,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:06:12,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-16 11:06:12,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:12,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 11:06:12,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 46 proven. 250 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-16 11:06:12,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:13,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:13,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261537863] [2022-11-16 11:06:13,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:06:13,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701818518] [2022-11-16 11:06:13,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701818518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:13,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:06:13,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-16 11:06:13,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110170297] [2022-11-16 11:06:13,043 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:13,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:06:13,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:13,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:06:13,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:06:13,044 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 11:06:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:13,757 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-11-16 11:06:13,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:06:13,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 99 [2022-11-16 11:06:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:13,759 INFO L225 Difference]: With dead ends: 64 [2022-11-16 11:06:13,759 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 11:06:13,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:06:13,760 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:13,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 328 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:06:13,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 11:06:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-16 11:06:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 11:06:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-11-16 11:06:13,778 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 99 [2022-11-16 11:06:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:13,779 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-11-16 11:06:13,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 11:06:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-11-16 11:06:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-16 11:06:13,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:13,781 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:13,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:13,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:06:13,987 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1794064584, now seen corresponding path program 10 times [2022-11-16 11:06:13,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:13,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846705637] [2022-11-16 11:06:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:13,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:13,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:06:14,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46866203] [2022-11-16 11:06:14,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:06:14,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:14,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:14,001 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:14,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:06:14,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:06:14,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 11:06:14,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 66 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-11-16 11:06:14,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:18,912 WARN L833 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:06:38,966 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36|))))) is different from true [2022-11-16 11:06:57,018 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_113| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_36|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:07:03,054 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:07:05,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:05,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846705637] [2022-11-16 11:07:05,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:07:05,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46866203] [2022-11-16 11:07:05,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46866203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:05,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:07:05,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-11-16 11:07:05,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851825739] [2022-11-16 11:07:05,079 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:05,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:07:05,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:05,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:07:05,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=503, Unknown=4, NotChecked=188, Total=756 [2022-11-16 11:07:05,081 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 11:07:05,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:05,960 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2022-11-16 11:07:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:07:05,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 106 [2022-11-16 11:07:05,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:05,962 INFO L225 Difference]: With dead ends: 67 [2022-11-16 11:07:05,962 INFO L226 Difference]: Without dead ends: 62 [2022-11-16 11:07:05,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=80, Invalid=634, Unknown=4, NotChecked=212, Total=930 [2022-11-16 11:07:05,964 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:05,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 365 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:07:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-16 11:07:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-16 11:07:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 11:07:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-11-16 11:07:05,985 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 106 [2022-11-16 11:07:05,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:05,985 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-11-16 11:07:05,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 11:07:05,985 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-11-16 11:07:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 11:07:05,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:05,987 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:05,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:06,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:07:06,190 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:06,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash -444443359, now seen corresponding path program 11 times [2022-11-16 11:07:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:06,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959328262] [2022-11-16 11:07:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:06,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:06,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:07:06,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482035958] [2022-11-16 11:07:06,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:07:06,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:06,204 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:06,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:07:06,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-11-16 11:07:06,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:06,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-16 11:07:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 29 proven. 358 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-16 11:07:07,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:07,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:07,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959328262] [2022-11-16 11:07:07,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:07:07,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482035958] [2022-11-16 11:07:07,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482035958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:07,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:07:07,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-16 11:07:07,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785655346] [2022-11-16 11:07:07,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:07,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:07:07,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:07,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:07:07,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:07:07,315 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 11:07:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:08,163 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-11-16 11:07:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:07:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 113 [2022-11-16 11:07:08,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:08,164 INFO L225 Difference]: With dead ends: 70 [2022-11-16 11:07:08,165 INFO L226 Difference]: Without dead ends: 65 [2022-11-16 11:07:08,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:07:08,166 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:08,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 424 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:07:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-16 11:07:08,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-16 11:07:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-16 11:07:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2022-11-16 11:07:08,186 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 113 [2022-11-16 11:07:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:08,187 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2022-11-16 11:07:08,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 11:07:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2022-11-16 11:07:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-16 11:07:08,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:08,189 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:08,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:08,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:08,396 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:08,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash -16713960, now seen corresponding path program 12 times [2022-11-16 11:07:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:08,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803191781] [2022-11-16 11:07:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:08,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:08,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:07:08,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472574913] [2022-11-16 11:07:08,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:07:08,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:08,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:08,409 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:08,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:07:08,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-16 11:07:08,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:08,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 11:07:08,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 67 proven. 370 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-11-16 11:07:09,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:43,860 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_52| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151|) 9) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_52|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_52| 3))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| 2)) 4) 0)))) is different from true [2022-11-16 11:08:01,915 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_52| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151|) 9) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_52|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_52| 3))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_151| 2)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:08:07,954 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 16 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 4 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:09:16,629 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 49 (* |c_ULTIMATE.start_main_~y~0#1| 14)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 7 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 7) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:09:24,698 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 7)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 8) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |ULTIMATE.start_main_~k~0#1| 8) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 64 (* |c_ULTIMATE.start_main_~y~0#1| 16))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:09:26,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803191781] [2022-11-16 11:09:26,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:09:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472574913] [2022-11-16 11:09:26,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472574913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:26,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:09:26,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-11-16 11:09:26,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131358853] [2022-11-16 11:09:26,724 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:26,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:09:26,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:26,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:09:26,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=833, Unknown=8, NotChecked=320, Total=1332 [2022-11-16 11:09:26,726 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-16 11:09:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:27,655 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-11-16 11:09:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:09:27,655 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 120 [2022-11-16 11:09:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:27,657 INFO L225 Difference]: With dead ends: 73 [2022-11-16 11:09:27,657 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 11:09:27,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 71.2s TimeCoverageRelationStatistics Valid=190, Invalid=1012, Unknown=8, NotChecked=350, Total=1560 [2022-11-16 11:09:27,658 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:27,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 466 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:09:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 11:09:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-16 11:09:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-16 11:09:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-11-16 11:09:27,677 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 120 [2022-11-16 11:09:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:27,677 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-11-16 11:09:27,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-16 11:09:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-11-16 11:09:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-16 11:09:27,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:27,679 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:27,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:27,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:09:27,883 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:27,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:27,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1287814847, now seen corresponding path program 13 times [2022-11-16 11:09:27,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:27,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050459514] [2022-11-16 11:09:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:27,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:27,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:09:27,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503842958] [2022-11-16 11:09:27,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:09:27,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:27,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:27,894 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:27,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:09:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:28,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 11:09:28,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 81 proven. 409 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-11-16 11:09:28,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:18,916 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| 3)) 4) 0)))) is different from true [2022-11-16 11:10:36,970 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_174| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:10:43,009 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:10:45,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:45,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050459514] [2022-11-16 11:10:45,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:10:45,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503842958] [2022-11-16 11:10:45,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503842958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:45,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:10:45,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-11-16 11:10:45,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110570363] [2022-11-16 11:10:45,034 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:45,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:10:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:10:45,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=678, Unknown=18, NotChecked=162, Total=930 [2022-11-16 11:10:45,036 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-16 11:10:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:48,020 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2022-11-16 11:10:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:10:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 127 [2022-11-16 11:10:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:48,022 INFO L225 Difference]: With dead ends: 76 [2022-11-16 11:10:48,022 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 11:10:48,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=92, Invalid=831, Unknown=19, NotChecked=180, Total=1122 [2022-11-16 11:10:48,026 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:48,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 510 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:10:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 11:10:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-16 11:10:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 19 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 11:10:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-11-16 11:10:48,043 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 127 [2022-11-16 11:10:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:48,044 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-11-16 11:10:48,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-16 11:10:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-11-16 11:10:48,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 11:10:48,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:48,046 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:48,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:48,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:10:48,247 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash 146925304, now seen corresponding path program 14 times [2022-11-16 11:10:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:48,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213097242] [2022-11-16 11:10:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:48,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:48,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:10:48,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126672287] [2022-11-16 11:10:48,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:10:48,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:48,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:48,258 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:48,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:10:48,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:10:48,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:48,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 11:10:48,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 83 proven. 463 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-16 11:10:48,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:53,317 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:10:53,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:53,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213097242] [2022-11-16 11:10:53,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:10:53,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126672287] [2022-11-16 11:10:53,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126672287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:53,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:10:53,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-11-16 11:10:53,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812469881] [2022-11-16 11:10:53,320 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:53,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:10:53,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:10:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=733, Unknown=1, NotChecked=54, Total=870 [2022-11-16 11:10:53,321 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 11:10:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:54,431 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-11-16 11:10:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:10:54,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 134 [2022-11-16 11:10:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:54,433 INFO L225 Difference]: With dead ends: 79 [2022-11-16 11:10:54,433 INFO L226 Difference]: Without dead ends: 74 [2022-11-16 11:10:54,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=101, Invalid=894, Unknown=1, NotChecked=60, Total=1056 [2022-11-16 11:10:54,434 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:54,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 533 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:10:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-16 11:10:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-16 11:10:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-16 11:10:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-11-16 11:10:54,452 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 134 [2022-11-16 11:10:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:54,453 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-11-16 11:10:54,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 11:10:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-11-16 11:10:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-16 11:10:54,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:54,455 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:54,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:54,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:10:54,655 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1332278625, now seen corresponding path program 15 times [2022-11-16 11:10:54,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:54,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125043861] [2022-11-16 11:10:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:54,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:54,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:10:54,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790698195] [2022-11-16 11:10:54,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:10:54,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:54,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:54,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:10:55,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-16 11:10:55,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:55,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-16 11:10:55,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 55 proven. 550 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-11-16 11:10:55,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:55,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:55,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125043861] [2022-11-16 11:10:55,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:10:55,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790698195] [2022-11-16 11:10:55,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790698195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:55,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:10:55,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-11-16 11:10:55,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901589423] [2022-11-16 11:10:55,967 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:10:55,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:10:55,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:10:55,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:10:55,969 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-16 11:10:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:57,189 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-11-16 11:10:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:10:57,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 141 [2022-11-16 11:10:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:57,191 INFO L225 Difference]: With dead ends: 82 [2022-11-16 11:10:57,191 INFO L226 Difference]: Without dead ends: 77 [2022-11-16 11:10:57,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:10:57,192 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:57,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 604 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:10:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-16 11:10:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-16 11:10:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 21 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 11:10:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-11-16 11:10:57,211 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 141 [2022-11-16 11:10:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:57,212 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-11-16 11:10:57,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-16 11:10:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-11-16 11:10:57,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-16 11:10:57,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:57,214 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:10:57,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:57,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:10:57,422 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:57,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:57,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2058456792, now seen corresponding path program 16 times [2022-11-16 11:10:57,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:57,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401358537] [2022-11-16 11:10:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:57,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:57,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:10:57,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990078228] [2022-11-16 11:10:57,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:10:57,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:57,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:57,435 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:57,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:10:57,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:10:57,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:10:57,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-16 11:10:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 96 proven. 571 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-11-16 11:10:58,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:02,617 WARN L833 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:11:22,680 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_86| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_86|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237|)))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2022-11-16 11:11:40,732 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_86| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_86|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_237|)))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:11:46,765 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) |c_ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:14:39,647 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 8) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 9) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 18) 81) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 9 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:15:13,871 WARN L833 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 11) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 11 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 22) 121)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:15:21,933 WARN L833 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 12) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| 24) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 144) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 12 |c_ULTIMATE.start_main_~k~0#1|))) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 11) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:15:54,952 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ 196 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 28)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 14 |c_ULTIMATE.start_main_~k~0#1|))) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 13) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 14) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:16:03,012 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 14) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 15 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 30) 225)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 15) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:16:11,073 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 15) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 16) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 256 (* |c_ULTIMATE.start_main_~y~0#1| 32)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 16 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:17:24,356 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 18)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 19) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|) (* 19 |ULTIMATE.start_main_~k~0#1|)) (+ 361 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 38))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:17:26,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:17:26,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401358537] [2022-11-16 11:17:26,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:17:26,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990078228] [2022-11-16 11:17:26,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990078228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:17:26,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:17:26,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-11-16 11:17:26,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219022143] [2022-11-16 11:17:26,384 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:26,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:17:26,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:17:26,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:17:26,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1340, Unknown=25, NotChecked=968, Total=2652 [2022-11-16 11:17:26,385 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 11:17:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:31,853 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2022-11-16 11:17:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:17:31,854 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 148 [2022-11-16 11:17:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:31,856 INFO L225 Difference]: With dead ends: 85 [2022-11-16 11:17:31,856 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 11:17:31,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 241.2s TimeCoverageRelationStatistics Valid=338, Invalid=1571, Unknown=27, NotChecked=1034, Total=2970 [2022-11-16 11:17:31,859 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:31,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 654 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:17:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 11:17:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-16 11:17:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-16 11:17:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2022-11-16 11:17:31,884 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 148 [2022-11-16 11:17:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:31,884 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2022-11-16 11:17:31,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 11:17:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2022-11-16 11:17:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-16 11:17:31,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:31,887 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:31,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:32,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:32,094 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:17:32,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:32,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1810280833, now seen corresponding path program 17 times [2022-11-16 11:17:32,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:17:32,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428449039] [2022-11-16 11:17:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:32,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:17:32,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:17:32,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009220721] [2022-11-16 11:17:32,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:17:32,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:32,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:17:32,106 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:17:32,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:18:21,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-11-16 11:18:21,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:21,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 11:18:21,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 89 proven. 643 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-11-16 11:18:22,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:22,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:22,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428449039] [2022-11-16 11:18:22,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:18:22,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009220721] [2022-11-16 11:18:22,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009220721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:22,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:18:22,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-11-16 11:18:22,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802898720] [2022-11-16 11:18:22,477 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:22,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:18:22,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:18:22,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:18:22,478 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-16 11:18:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:23,875 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-11-16 11:18:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:18:23,876 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 155 [2022-11-16 11:18:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:23,877 INFO L225 Difference]: With dead ends: 88 [2022-11-16 11:18:23,877 INFO L226 Difference]: Without dead ends: 83 [2022-11-16 11:18:23,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:18:23,878 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 7 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:23,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 680 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:18:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-16 11:18:23,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-16 11:18:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 23 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:18:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2022-11-16 11:18:23,902 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 155 [2022-11-16 11:18:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:23,902 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2022-11-16 11:18:23,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-16 11:18:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2022-11-16 11:18:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-16 11:18:23,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:23,905 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:23,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:18:24,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:24,115 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash 548269752, now seen corresponding path program 18 times [2022-11-16 11:18:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:24,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95541858] [2022-11-16 11:18:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:24,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:24,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:18:24,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089300995] [2022-11-16 11:18:24,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:18:24,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:24,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:24,125 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:24,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:18:26,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-11-16 11:18:26,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:18:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-16 11:18:26,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:18:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 97 proven. 703 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-11-16 11:18:26,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:18:27,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:18:27,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95541858] [2022-11-16 11:18:27,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:18:27,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089300995] [2022-11-16 11:18:27,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089300995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:18:27,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:18:27,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-11-16 11:18:27,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818792685] [2022-11-16 11:18:27,243 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:18:27,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 11:18:27,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:18:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 11:18:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:18:27,244 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:18:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:18:28,819 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2022-11-16 11:18:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:18:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 162 [2022-11-16 11:18:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:18:28,821 INFO L225 Difference]: With dead ends: 91 [2022-11-16 11:18:28,821 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 11:18:28,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:18:28,823 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:18:28,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 760 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:18:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 11:18:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-16 11:18:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-16 11:18:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2022-11-16 11:18:28,844 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 162 [2022-11-16 11:18:28,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:18:28,844 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2022-11-16 11:18:28,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:18:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2022-11-16 11:18:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-16 11:18:28,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:18:28,846 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:18:28,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:18:29,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:29,047 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:18:29,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:18:29,047 INFO L85 PathProgramCache]: Analyzing trace with hash -954681951, now seen corresponding path program 19 times [2022-11-16 11:18:29,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:18:29,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011549482] [2022-11-16 11:18:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:18:29,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:18:29,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:18:29,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807371059] [2022-11-16 11:18:29,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:18:29,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:18:29,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:18:29,061 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:18:29,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ab277a-c815-489c-92f5-013150020e98/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process