./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:38:34,691 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:38:34,772 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:38:34,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:38:34,778 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:38:34,805 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:38:34,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:38:34,806 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:38:34,806 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:38:34,807 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:38:34,807 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:38:34,808 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:38:34,808 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:38:34,809 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:38:34,809 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:38:34,810 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:38:34,810 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:38:34,811 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:38:34,811 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:38:34,812 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:38:34,812 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:38:34,813 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:38:34,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:38:34,814 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:38:34,815 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:38:34,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:38:34,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:38:34,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:38:34,816 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:38:34,817 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:38:34,817 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:38:34,818 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:38:34,818 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:38:34,818 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:38:34,818 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:38:34,819 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:38:34,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:38:34,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:38:34,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:38:34,819 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:38:34,820 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:38:34,820 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:38:34,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:38:34,820 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:38:34,821 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:38:34,821 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:38:34,821 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:38:34,821 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d [2023-12-02 14:38:35,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:38:35,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:38:35,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:38:35,060 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:38:35,060 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:38:35,061 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2023-12-02 14:38:37,767 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:38:37,923 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:38:37,924 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2023-12-02 14:38:37,930 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/data/0c45ce621/e36f858ba04a458fa47fe0092a71de49/FLAG7b7467ba4 [2023-12-02 14:38:37,942 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/data/0c45ce621/e36f858ba04a458fa47fe0092a71de49 [2023-12-02 14:38:37,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:38:37,946 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:38:37,947 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:38:37,947 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:38:37,951 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:38:37,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:38:37" (1/1) ... [2023-12-02 14:38:37,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@905234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:37, skipping insertion in model container [2023-12-02 14:38:37,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:38:37" (1/1) ... [2023-12-02 14:38:37,974 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:38:38,133 WARN L240 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_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2023-12-02 14:38:38,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:38:38,162 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:38:38,171 WARN L240 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_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2023-12-02 14:38:38,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:38:38,197 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:38:38,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38 WrapperNode [2023-12-02 14:38:38,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:38:38,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:38:38,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:38:38,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:38:38,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,228 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2023-12-02 14:38:38,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:38:38,229 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:38:38,229 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:38:38,230 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:38:38,236 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,238 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,238 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,241 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,244 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,246 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:38:38,249 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:38:38,249 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:38:38,249 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:38:38,250 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (1/1) ... [2023-12-02 14:38:38,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:38:38,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:38:38,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:38:38,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:38:38,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:38:38,311 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 14:38:38,311 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 14:38:38,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:38:38,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:38:38,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:38:38,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 14:38:38,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 14:38:38,382 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:38:38,384 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:38:38,527 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:38:38,555 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:38:38,555 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 14:38:38,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:38:38 BoogieIcfgContainer [2023-12-02 14:38:38,557 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:38:38,560 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:38:38,560 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:38:38,564 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:38:38,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:38:37" (1/3) ... [2023-12-02 14:38:38,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360d54c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:38:38, skipping insertion in model container [2023-12-02 14:38:38,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:38" (2/3) ... [2023-12-02 14:38:38,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360d54c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:38:38, skipping insertion in model container [2023-12-02 14:38:38,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:38:38" (3/3) ... [2023-12-02 14:38:38,567 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2023-12-02 14:38:38,586 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:38:38,586 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:38:38,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:38:38,642 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@2ba5fb4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:38:38,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:38:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:38:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 14:38:38,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:38,655 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:38:38,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:38,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:38,661 INFO L85 PathProgramCache]: Analyzing trace with hash -732132214, now seen corresponding path program 1 times [2023-12-02 14:38:38,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:38,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530960143] [2023-12-02 14:38:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:38,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:38,761 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:38:38,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203289927] [2023-12-02 14:38:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:38,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:38,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:38:38,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:38:38,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:38:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:38,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 14:38:38,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:38:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:38:38,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:38:38,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:38,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530960143] [2023-12-02 14:38:38,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:38:38,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203289927] [2023-12-02 14:38:38,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203289927] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:38,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:38,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:38:38,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069977426] [2023-12-02 14:38:38,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:38,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 14:38:38,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:38,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 14:38:38,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 14:38:38,893 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:38:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:38,919 INFO L93 Difference]: Finished difference Result 48 states and 77 transitions. [2023-12-02 14:38:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 14:38:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-12-02 14:38:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:38,928 INFO L225 Difference]: With dead ends: 48 [2023-12-02 14:38:38,929 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 14:38:38,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 14:38:38,935 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:38,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:38:38,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 14:38:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 14:38:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 14:38:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2023-12-02 14:38:38,967 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 13 [2023-12-02 14:38:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:38,968 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-12-02 14:38:38,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:38:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2023-12-02 14:38:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 14:38:38,970 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:38,970 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:38:38,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:38:39,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 14:38:39,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:39,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:39,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1566218095, now seen corresponding path program 1 times [2023-12-02 14:38:39,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:39,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327204599] [2023-12-02 14:38:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:39,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:39,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:38:39,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980516902] [2023-12-02 14:38:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:39,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:39,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:38:39,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:38:39,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:38:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:39,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:38:39,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:38:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:38:39,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:38:39,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327204599] [2023-12-02 14:38:39,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:38:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980516902] [2023-12-02 14:38:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980516902] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:39,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:39,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:38:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715830683] [2023-12-02 14:38:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:39,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:38:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:38:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:38:39,297 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:38:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:39,321 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-12-02 14:38:39,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:38:39,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-12-02 14:38:39,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:39,323 INFO L225 Difference]: With dead ends: 34 [2023-12-02 14:38:39,323 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 14:38:39,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:38:39,325 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:39,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:38:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 14:38:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-02 14:38:39,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 14:38:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-12-02 14:38:39,333 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2023-12-02 14:38:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:39,334 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-12-02 14:38:39,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:38:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-12-02 14:38:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 14:38:39,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:39,335 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:38:39,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:38:39,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:39,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:39,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:39,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1567886391, now seen corresponding path program 1 times [2023-12-02 14:38:39,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:39,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855234186] [2023-12-02 14:38:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:39,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:39,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:38:39,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296036958] [2023-12-02 14:38:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:39,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:39,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:38:39,555 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:38:39,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:38:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:39,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 14:38:39,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:38:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:38:39,790 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:38:39,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855234186] [2023-12-02 14:38:39,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:38:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296036958] [2023-12-02 14:38:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296036958] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:39,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:39,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:38:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676727949] [2023-12-02 14:38:39,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:39,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:38:39,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:38:39,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:38:39,793 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:38:42,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:38:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:42,395 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2023-12-02 14:38:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:38:42,395 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-12-02 14:38:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:42,396 INFO L225 Difference]: With dead ends: 46 [2023-12-02 14:38:42,397 INFO L226 Difference]: Without dead ends: 44 [2023-12-02 14:38:42,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:38:42,398 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:42,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 82 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 14:38:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-02 14:38:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-12-02 14:38:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 14:38:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2023-12-02 14:38:42,414 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 14 [2023-12-02 14:38:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:42,414 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2023-12-02 14:38:42,415 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:38:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2023-12-02 14:38:42,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 14:38:42,416 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:42,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:38:42,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 14:38:42,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:42,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:42,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:42,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1259885980, now seen corresponding path program 1 times [2023-12-02 14:38:42,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:42,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31596603] [2023-12-02 14:38:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:42,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:42,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:38:42,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966231410] [2023-12-02 14:38:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:42,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:42,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:38:42,631 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:38:42,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:38:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:42,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:38:42,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:38:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:38:42,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:38:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:38:42,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:42,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31596603] [2023-12-02 14:38:42,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:38:42,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966231410] [2023-12-02 14:38:42,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966231410] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:38:42,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213006020] [2023-12-02 14:38:42,884 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 14:38:42,885 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:38:42,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:38:42,892 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:38:42,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:38:43,819 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 67 for LOIs [2023-12-02 14:38:43,942 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-12-02 14:38:44,079 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:38:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1213006020] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:48,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:38:48,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 7] total 22 [2023-12-02 14:38:48,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530814354] [2023-12-02 14:38:48,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:48,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:38:48,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:48,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:38:48,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-12-02 14:38:48,849 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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) [2023-12-02 14:38:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:49,718 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2023-12-02 14:38:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 14:38:49,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 20 [2023-12-02 14:38:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:49,720 INFO L225 Difference]: With dead ends: 57 [2023-12-02 14:38:49,720 INFO L226 Difference]: Without dead ends: 50 [2023-12-02 14:38:49,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-12-02 14:38:49,721 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:49,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 121 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 14:38:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-02 14:38:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-12-02 14:38:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:38:49,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2023-12-02 14:38:49,734 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 20 [2023-12-02 14:38:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:49,734 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2023-12-02 14:38:49,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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) [2023-12-02 14:38:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2023-12-02 14:38:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 14:38:49,736 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:49,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:38:49,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 14:38:49,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:49,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:49,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:49,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1960315687, now seen corresponding path program 1 times [2023-12-02 14:38:49,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:49,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332103217] [2023-12-02 14:38:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:49,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:49,951 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:38:49,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926629713] [2023-12-02 14:38:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:49,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:49,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:38:49,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:38:49,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:38:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:50,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:38:50,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:38:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:38:50,042 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:38:50,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:50,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332103217] [2023-12-02 14:38:50,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:38:50,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926629713] [2023-12-02 14:38:50,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926629713] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:50,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:50,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:38:50,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654594552] [2023-12-02 14:38:50,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:50,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:38:50,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:38:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:38:50,044 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:38:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:50,082 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2023-12-02 14:38:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:38:50,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-02 14:38:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:50,084 INFO L225 Difference]: With dead ends: 86 [2023-12-02 14:38:50,084 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 14:38:50,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:38:50,085 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:50,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:38:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 14:38:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-02 14:38:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 37 states have internal predecessors, (49), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:38:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2023-12-02 14:38:50,101 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 26 [2023-12-02 14:38:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:50,101 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2023-12-02 14:38:50,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:38:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2023-12-02 14:38:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:38:50,102 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:50,102 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:38:50,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 14:38:50,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:50,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:50,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:50,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1819629797, now seen corresponding path program 1 times [2023-12-02 14:38:50,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:50,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189329884] [2023-12-02 14:38:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:50,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:50,312 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:38:50,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199140917] [2023-12-02 14:38:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:50,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:50,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:38:50,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:38:50,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:38:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:50,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 14:38:50,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:38:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:38:50,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:38:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:38:50,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:50,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189329884] [2023-12-02 14:38:50,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:38:50,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199140917] [2023-12-02 14:38:50,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199140917] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:38:50,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [563426100] [2023-12-02 14:38:50,650 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 14:38:50,651 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:38:50,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:38:50,651 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:38:50,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:38:52,232 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 94 for LOIs [2023-12-02 14:38:52,352 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-12-02 14:38:52,405 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:39:04,163 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1224#(and (<= 2 ~counter~0) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_20| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_30| Int)) (and (<= |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_20| 4294967295) (<= 1 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_22|) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_30| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_19| 4611686018427387904)) (not (= (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_19| 4) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_30| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_20|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_22| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_22|)) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_22| 2) (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_20| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_20|)))) (<= 0 (+ 4294967295 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_20|)) (<= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_19| 4611686018427387904) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_30|))))' at error location [2023-12-02 14:39:04,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:39:04,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:39:04,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-12-02 14:39:04,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262313574] [2023-12-02 14:39:04,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:39:04,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 14:39:04,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:39:04,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 14:39:04,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2023-12-02 14:39:04,165 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:39:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:39:04,362 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2023-12-02 14:39:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:39:04,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-12-02 14:39:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:39:04,364 INFO L225 Difference]: With dead ends: 71 [2023-12-02 14:39:04,364 INFO L226 Difference]: Without dead ends: 67 [2023-12-02 14:39:04,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-12-02 14:39:04,366 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 69 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:39:04,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 184 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:39:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-02 14:39:04,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 37. [2023-12-02 14:39:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:39:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-12-02 14:39:04,381 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 30 [2023-12-02 14:39:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:39:04,381 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-12-02 14:39:04,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:39:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-12-02 14:39:04,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 14:39:04,383 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:39:04,383 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:39:04,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:39:04,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:04,584 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:39:04,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:39:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 149144288, now seen corresponding path program 1 times [2023-12-02 14:39:04,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:39:04,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046947283] [2023-12-02 14:39:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:04,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:39:04,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:39:04,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553628601] [2023-12-02 14:39:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:04,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:04,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:39:04,594 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:39:04,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:39:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:39:04,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:39:04,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:39:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:39:04,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:39:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 14:39:04,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:39:04,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046947283] [2023-12-02 14:39:04,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:39:04,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553628601] [2023-12-02 14:39:04,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553628601] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:39:04,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:39:04,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-02 14:39:04,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627567618] [2023-12-02 14:39:04,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:39:04,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:39:04,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:39:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:39:04,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-02 14:39:04,731 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 14:39:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:39:04,773 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2023-12-02 14:39:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:39:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2023-12-02 14:39:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:39:04,774 INFO L225 Difference]: With dead ends: 67 [2023-12-02 14:39:04,774 INFO L226 Difference]: Without dead ends: 46 [2023-12-02 14:39:04,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-02 14:39:04,775 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:39:04,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 104 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:39:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-02 14:39:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-12-02 14:39:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 14:39:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-12-02 14:39:04,788 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 32 [2023-12-02 14:39:04,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:39:04,788 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-12-02 14:39:04,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 14:39:04,788 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-12-02 14:39:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 14:39:04,789 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:39:04,789 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:39:04,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 14:39:04,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:04,990 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:39:04,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:39:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash 724021605, now seen corresponding path program 1 times [2023-12-02 14:39:04,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:39:04,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998416113] [2023-12-02 14:39:04,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:04,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:39:04,997 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:39:04,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109668420] [2023-12-02 14:39:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:04,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:04,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:39:04,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:39:04,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 14:39:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:39:05,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:39:05,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:39:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:39:05,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:39:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 14:39:05,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:39:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998416113] [2023-12-02 14:39:05,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:39:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109668420] [2023-12-02 14:39:05,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109668420] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:39:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1569357405] [2023-12-02 14:39:05,126 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 14:39:05,126 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:39:05,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:39:05,126 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:39:05,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:39:06,847 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2023-12-02 14:39:06,851 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-12-02 14:39:06,888 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:39:14,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1963#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:39:14,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:39:14,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:39:14,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-12-02 14:39:14,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506899758] [2023-12-02 14:39:14,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:39:14,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 14:39:14,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:39:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 14:39:14,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2023-12-02 14:39:14,815 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 14:39:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:39:14,968 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2023-12-02 14:39:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 14:39:14,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 34 [2023-12-02 14:39:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:39:14,970 INFO L225 Difference]: With dead ends: 122 [2023-12-02 14:39:14,970 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 14:39:14,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 14:39:14,971 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:39:14,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 161 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:39:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 14:39:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2023-12-02 14:39:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.28125) internal successors, (82), 65 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 14:39:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2023-12-02 14:39:14,998 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 34 [2023-12-02 14:39:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:39:14,998 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2023-12-02 14:39:14,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 14:39:14,998 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2023-12-02 14:39:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 14:39:14,999 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:39:15,000 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:39:15,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 14:39:15,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:15,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:39:15,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:39:15,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1908181273, now seen corresponding path program 1 times [2023-12-02 14:39:15,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:39:15,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206198981] [2023-12-02 14:39:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:15,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:39:15,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:39:15,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761238237] [2023-12-02 14:39:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:15,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:15,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:39:15,209 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:39:15,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 14:39:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:39:15,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:39:15,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:39:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 14:39:15,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:39:15,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:39:15,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206198981] [2023-12-02 14:39:15,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:39:15,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761238237] [2023-12-02 14:39:15,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761238237] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:39:15,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:39:15,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:39:15,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631635891] [2023-12-02 14:39:15,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:39:15,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:39:15,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:39:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:39:15,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:39:15,287 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:39:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:39:15,342 INFO L93 Difference]: Finished difference Result 151 states and 201 transitions. [2023-12-02 14:39:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:39:15,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2023-12-02 14:39:15,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:39:15,345 INFO L225 Difference]: With dead ends: 151 [2023-12-02 14:39:15,345 INFO L226 Difference]: Without dead ends: 112 [2023-12-02 14:39:15,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:39:15,347 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:39:15,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 79 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:39:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-02 14:39:15,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2023-12-02 14:39:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 82 states have internal predecessors, (104), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 14:39:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 145 transitions. [2023-12-02 14:39:15,386 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 145 transitions. Word has length 38 [2023-12-02 14:39:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:39:15,387 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 145 transitions. [2023-12-02 14:39:15,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:39:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 145 transitions. [2023-12-02 14:39:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 14:39:15,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:39:15,389 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:39:15,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 14:39:15,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:15,591 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:39:15,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:39:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1881389676, now seen corresponding path program 1 times [2023-12-02 14:39:15,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:39:15,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853966775] [2023-12-02 14:39:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:15,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:39:15,597 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:39:15,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597314162] [2023-12-02 14:39:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:15,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:15,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:39:15,599 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:39:15,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 14:39:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:39:15,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:39:15,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:39:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:39:15,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:39:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 14:39:15,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:39:15,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853966775] [2023-12-02 14:39:15,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:39:15,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597314162] [2023-12-02 14:39:15,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597314162] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:39:15,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180642264] [2023-12-02 14:39:15,759 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:39:15,760 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:39:15,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:39:15,760 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:39:15,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:39:17,784 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 61 for LOIs [2023-12-02 14:39:17,822 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-12-02 14:39:17,870 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:39:28,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3029#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:39:28,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:39:28,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:39:28,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-12-02 14:39:28,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316290410] [2023-12-02 14:39:28,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:39:28,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 14:39:28,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:39:28,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 14:39:28,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2023-12-02 14:39:28,098 INFO L87 Difference]: Start difference. First operand 110 states and 145 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-02 14:39:28,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:39:28,311 INFO L93 Difference]: Finished difference Result 230 states and 311 transitions. [2023-12-02 14:39:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 14:39:28,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 40 [2023-12-02 14:39:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:39:28,313 INFO L225 Difference]: With dead ends: 230 [2023-12-02 14:39:28,314 INFO L226 Difference]: Without dead ends: 175 [2023-12-02 14:39:28,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 14:39:28,315 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:39:28,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 179 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:39:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-02 14:39:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 156. [2023-12-02 14:39:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 117 states have internal predecessors, (149), 30 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-12-02 14:39:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 208 transitions. [2023-12-02 14:39:28,380 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 208 transitions. Word has length 40 [2023-12-02 14:39:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:39:28,381 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 208 transitions. [2023-12-02 14:39:28,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-02 14:39:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 208 transitions. [2023-12-02 14:39:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 14:39:28,382 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:39:28,382 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:39:28,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 14:39:28,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 14:39:28,583 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:39:28,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:39:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1532401011, now seen corresponding path program 1 times [2023-12-02 14:39:28,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:39:28,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042765399] [2023-12-02 14:39:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:28,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:39:28,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:39:28,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293021377] [2023-12-02 14:39:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:28,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:28,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:39:28,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:39:28,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 14:39:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:39:28,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:39:28,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:39:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:39:28,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:39:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 14:39:28,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:39:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042765399] [2023-12-02 14:39:28,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:39:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293021377] [2023-12-02 14:39:28,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293021377] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:39:28,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779652596] [2023-12-02 14:39:28,768 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:39:28,768 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:39:28,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:39:28,769 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:39:28,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:39:31,050 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2023-12-02 14:39:31,094 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-12-02 14:39:31,141 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:39:35,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3903#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (or (exists ((|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_120| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_148| Int) (|v_ULTIMATE.start_main_~R~0#1_BEFORE_CALL_143| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_120| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_148|) (<= 0 (+ |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_120| 4611686018427387903)) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_148| 2147483647) (<= 1 ~counter~0) (<= |v_ULTIMATE.start_main_~R~0#1_BEFORE_CALL_143| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~R~0#1_BEFORE_CALL_143| 2147483648)) (not (= (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_120| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_120|) 1) (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_120| 2) (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_120| 4) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_148| 4)))))) (and (<= 1 |#StackHeapBarrier|) (<= ~counter~0 51) (<= 1 ~counter~0))))' at error location [2023-12-02 14:39:35,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:39:35,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:39:35,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-02 14:39:35,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987881466] [2023-12-02 14:39:35,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:39:35,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 14:39:35,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:39:35,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 14:39:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 14:39:35,432 INFO L87 Difference]: Start difference. First operand 156 states and 208 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-12-02 14:39:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:39:35,726 INFO L93 Difference]: Finished difference Result 252 states and 333 transitions. [2023-12-02 14:39:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 14:39:35,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 46 [2023-12-02 14:39:35,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:39:35,729 INFO L225 Difference]: With dead ends: 252 [2023-12-02 14:39:35,729 INFO L226 Difference]: Without dead ends: 247 [2023-12-02 14:39:35,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 14:39:35,730 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 124 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:39:35,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 204 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:39:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-12-02 14:39:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 212. [2023-12-02 14:39:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 157 states have (on average 1.286624203821656) internal successors, (202), 162 states have internal predecessors, (202), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (42), 37 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-02 14:39:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 287 transitions. [2023-12-02 14:39:35,817 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 287 transitions. Word has length 46 [2023-12-02 14:39:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:39:35,817 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 287 transitions. [2023-12-02 14:39:35,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2023-12-02 14:39:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 287 transitions. [2023-12-02 14:39:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 14:39:35,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:39:35,819 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:39:35,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 14:39:36,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:36,025 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:39:36,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:39:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -482951008, now seen corresponding path program 1 times [2023-12-02 14:39:36,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:39:36,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279076714] [2023-12-02 14:39:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:36,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:39:36,033 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:39:36,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532463007] [2023-12-02 14:39:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:36,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:36,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:39:36,034 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:39:36,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 14:39:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:39:36,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:39:36,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:39:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 14:39:36,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:39:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 14:39:36,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:39:36,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279076714] [2023-12-02 14:39:36,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:39:36,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532463007] [2023-12-02 14:39:36,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532463007] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:39:36,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647405482] [2023-12-02 14:39:36,281 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:39:36,281 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:39:36,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:39:36,281 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:39:36,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:39:39,180 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-12-02 14:39:39,229 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-12-02 14:39:39,266 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:39:50,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4931#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:39:50,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:39:50,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:39:50,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2023-12-02 14:39:50,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933931418] [2023-12-02 14:39:50,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:39:50,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:39:50,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:39:50,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:39:50,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 14:39:50,896 INFO L87 Difference]: Start difference. First operand 212 states and 287 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 14:39:51,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:39:51,138 INFO L93 Difference]: Finished difference Result 308 states and 423 transitions. [2023-12-02 14:39:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:39:51,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2023-12-02 14:39:51,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:39:51,140 INFO L225 Difference]: With dead ends: 308 [2023-12-02 14:39:51,141 INFO L226 Difference]: Without dead ends: 218 [2023-12-02 14:39:51,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 14:39:51,142 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 51 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:39:51,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 184 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:39:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-02 14:39:51,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 200. [2023-12-02 14:39:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 148 states have (on average 1.2297297297297298) internal successors, (182), 151 states have internal predecessors, (182), 40 states have call successors, (40), 12 states have call predecessors, (40), 11 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2023-12-02 14:39:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 261 transitions. [2023-12-02 14:39:51,202 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 261 transitions. Word has length 52 [2023-12-02 14:39:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:39:51,202 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 261 transitions. [2023-12-02 14:39:51,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 14:39:51,202 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 261 transitions. [2023-12-02 14:39:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 14:39:51,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:39:51,203 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:39:51,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 14:39:51,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 14:39:51,404 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:39:51,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:39:51,404 INFO L85 PathProgramCache]: Analyzing trace with hash 80082561, now seen corresponding path program 1 times [2023-12-02 14:39:51,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:39:51,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327127262] [2023-12-02 14:39:51,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:51,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:39:51,411 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:39:51,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694598848] [2023-12-02 14:39:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:51,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:51,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:39:51,413 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:39:51,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 14:39:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:39:51,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 14:39:51,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:39:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-12-02 14:39:51,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:39:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-12-02 14:39:51,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:39:51,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327127262] [2023-12-02 14:39:51,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:39:51,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694598848] [2023-12-02 14:39:51,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694598848] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:39:51,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653610757] [2023-12-02 14:39:51,572 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:39:51,572 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:39:51,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:39:51,572 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:39:51,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:39:53,271 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 14:39:53,274 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-12-02 14:39:53,320 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:39:55,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6189#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:39:55,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:39:55,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:39:55,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2023-12-02 14:39:55,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222151864] [2023-12-02 14:39:55,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:39:55,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:39:55,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:39:55,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:39:55,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-12-02 14:39:55,401 INFO L87 Difference]: Start difference. First operand 200 states and 261 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:39:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:39:55,535 INFO L93 Difference]: Finished difference Result 492 states and 676 transitions. [2023-12-02 14:39:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:39:55,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 82 [2023-12-02 14:39:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:39:55,539 INFO L225 Difference]: With dead ends: 492 [2023-12-02 14:39:55,539 INFO L226 Difference]: Without dead ends: 356 [2023-12-02 14:39:55,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-12-02 14:39:55,541 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:39:55,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 129 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:39:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-12-02 14:39:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 345. [2023-12-02 14:39:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 259 states have (on average 1.2664092664092663) internal successors, (328), 265 states have internal predecessors, (328), 74 states have call successors, (74), 12 states have call predecessors, (74), 11 states have return successors, (73), 67 states have call predecessors, (73), 73 states have call successors, (73) [2023-12-02 14:39:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 475 transitions. [2023-12-02 14:39:55,653 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 475 transitions. Word has length 82 [2023-12-02 14:39:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:39:55,653 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 475 transitions. [2023-12-02 14:39:55,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 14:39:55,654 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 475 transitions. [2023-12-02 14:39:55,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 14:39:55,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:39:55,656 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:39:55,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 14:39:55,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 14:39:55,856 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:39:55,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:39:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash -595391949, now seen corresponding path program 2 times [2023-12-02 14:39:55,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:39:55,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752165642] [2023-12-02 14:39:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:55,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:39:55,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:39:55,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593590686] [2023-12-02 14:39:55,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:39:55,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:55,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:39:55,866 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:39:55,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 14:39:55,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:39:55,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:39:55,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 14:39:55,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:39:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-12-02 14:39:55,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:39:55,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:39:55,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752165642] [2023-12-02 14:39:55,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:39:55,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593590686] [2023-12-02 14:39:55,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593590686] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:39:55,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:39:55,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:39:55,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663510637] [2023-12-02 14:39:55,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:39:55,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:39:55,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:39:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:39:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:39:55,958 INFO L87 Difference]: Start difference. First operand 345 states and 475 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:39:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:39:56,157 INFO L93 Difference]: Finished difference Result 591 states and 827 transitions. [2023-12-02 14:39:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:39:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2023-12-02 14:39:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:39:56,160 INFO L225 Difference]: With dead ends: 591 [2023-12-02 14:39:56,161 INFO L226 Difference]: Without dead ends: 442 [2023-12-02 14:39:56,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:39:56,162 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:39:56,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 133 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:39:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-12-02 14:39:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 375. [2023-12-02 14:39:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 284 states have (on average 1.2464788732394365) internal successors, (354), 290 states have internal predecessors, (354), 78 states have call successors, (78), 13 states have call predecessors, (78), 12 states have return successors, (77), 71 states have call predecessors, (77), 77 states have call successors, (77) [2023-12-02 14:39:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 509 transitions. [2023-12-02 14:39:56,303 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 509 transitions. Word has length 82 [2023-12-02 14:39:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:39:56,303 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 509 transitions. [2023-12-02 14:39:56,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:39:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 509 transitions. [2023-12-02 14:39:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 14:39:56,306 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:39:56,306 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:39:56,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 14:39:56,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 14:39:56,507 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:39:56,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:39:56,507 INFO L85 PathProgramCache]: Analyzing trace with hash 23064549, now seen corresponding path program 3 times [2023-12-02 14:39:56,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:39:56,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806176525] [2023-12-02 14:39:56,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:56,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:39:56,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:39:56,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153464618] [2023-12-02 14:39:56,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:39:56,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:39:56,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:39:56,516 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:39:56,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 14:39:56,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:39:56,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:39:56,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 14:39:56,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:39:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:39:56,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:39:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-02 14:39:56,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:39:56,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806176525] [2023-12-02 14:39:56,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:39:56,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153464618] [2023-12-02 14:39:56,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153464618] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:39:56,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370721395] [2023-12-02 14:39:56,888 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:39:56,888 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:39:56,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:39:56,888 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:39:56,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:39:58,416 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 14:39:58,418 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-12-02 14:39:58,465 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:40:01,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9632#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:40:01,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:40:01,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:40:01,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2023-12-02 14:40:01,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285623645] [2023-12-02 14:40:01,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:40:01,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 14:40:01,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:40:01,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 14:40:01,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=980, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 14:40:01,875 INFO L87 Difference]: Start difference. First operand 375 states and 509 transitions. Second operand has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 19 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2023-12-02 14:40:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:40:02,745 INFO L93 Difference]: Finished difference Result 1151 states and 1656 transitions. [2023-12-02 14:40:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 14:40:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 19 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 82 [2023-12-02 14:40:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:40:02,752 INFO L225 Difference]: With dead ends: 1151 [2023-12-02 14:40:02,752 INFO L226 Difference]: Without dead ends: 1100 [2023-12-02 14:40:02,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 14:40:02,754 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 288 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:40:02,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 317 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:40:02,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2023-12-02 14:40:03,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1040. [2023-12-02 14:40:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 785 states have (on average 1.2560509554140127) internal successors, (986), 794 states have internal predecessors, (986), 234 states have call successors, (234), 21 states have call predecessors, (234), 20 states have return successors, (233), 224 states have call predecessors, (233), 233 states have call successors, (233) [2023-12-02 14:40:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1453 transitions. [2023-12-02 14:40:03,086 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1453 transitions. Word has length 82 [2023-12-02 14:40:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:40:03,086 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1453 transitions. [2023-12-02 14:40:03,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 19 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2023-12-02 14:40:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1453 transitions. [2023-12-02 14:40:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 14:40:03,088 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:40:03,088 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:40:03,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 14:40:03,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 14:40:03,289 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:40:03,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:40:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash -237823764, now seen corresponding path program 1 times [2023-12-02 14:40:03,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:40:03,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512725310] [2023-12-02 14:40:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:40:03,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:40:03,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:40:03,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714718211] [2023-12-02 14:40:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:40:03,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:03,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:40:03,297 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:40:03,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 14:40:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:40:03,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 14:40:03,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:40:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:40:03,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:40:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-12-02 14:40:03,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:40:03,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512725310] [2023-12-02 14:40:03,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:40:03,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714718211] [2023-12-02 14:40:03,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714718211] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:40:03,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059819133] [2023-12-02 14:40:03,692 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:40:03,692 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:40:03,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:40:03,692 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:40:03,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:40:08,790 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-12-02 14:40:08,793 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-12-02 14:40:08,845 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:40:12,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13479#(and (<= ~counter~0 52) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:40:12,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:40:12,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:40:12,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-12-02 14:40:12,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857674520] [2023-12-02 14:40:12,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:40:12,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 14:40:12,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:40:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 14:40:12,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 14:40:12,422 INFO L87 Difference]: Start difference. First operand 1040 states and 1453 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-12-02 14:40:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:40:13,361 INFO L93 Difference]: Finished difference Result 1518 states and 2107 transitions. [2023-12-02 14:40:13,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 14:40:13,362 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 88 [2023-12-02 14:40:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:40:13,366 INFO L225 Difference]: With dead ends: 1518 [2023-12-02 14:40:13,366 INFO L226 Difference]: Without dead ends: 820 [2023-12-02 14:40:13,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 212 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2023-12-02 14:40:13,369 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 388 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:40:13,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 315 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:40:13,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2023-12-02 14:40:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 764. [2023-12-02 14:40:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 573 states have (on average 1.2076788830715532) internal successors, (692), 578 states have internal predecessors, (692), 168 states have call successors, (168), 23 states have call predecessors, (168), 22 states have return successors, (167), 162 states have call predecessors, (167), 167 states have call successors, (167) [2023-12-02 14:40:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1027 transitions. [2023-12-02 14:40:13,738 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1027 transitions. Word has length 88 [2023-12-02 14:40:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:40:13,739 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1027 transitions. [2023-12-02 14:40:13,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2023-12-02 14:40:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1027 transitions. [2023-12-02 14:40:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-02 14:40:13,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:40:13,742 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:40:13,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 14:40:13,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 14:40:13,943 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:40:13,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:40:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1700457485, now seen corresponding path program 1 times [2023-12-02 14:40:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:40:13,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919514109] [2023-12-02 14:40:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:40:13,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:40:13,953 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:40:13,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560385828] [2023-12-02 14:40:13,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:40:13,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:13,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:40:13,954 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:40:13,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 14:40:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:40:14,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 14:40:14,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:40:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:40:14,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:40:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-12-02 14:40:14,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:40:14,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919514109] [2023-12-02 14:40:14,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:40:14,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560385828] [2023-12-02 14:40:14,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560385828] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:40:14,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095199963] [2023-12-02 14:40:14,388 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:40:14,389 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:40:14,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:40:14,389 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:40:14,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:40:20,397 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 99 for LOIs [2023-12-02 14:40:20,515 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-12-02 14:40:20,563 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:40:26,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17489#(and (<= 1 |#StackHeapBarrier|) (<= ~counter~0 51) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:40:26,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:40:26,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:40:26,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-12-02 14:40:26,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912178170] [2023-12-02 14:40:26,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:40:26,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 14:40:26,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:40:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 14:40:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=1606, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 14:40:26,451 INFO L87 Difference]: Start difference. First operand 764 states and 1027 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-12-02 14:40:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:40:27,408 INFO L93 Difference]: Finished difference Result 875 states and 1183 transitions. [2023-12-02 14:40:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-02 14:40:27,409 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 94 [2023-12-02 14:40:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:40:27,413 INFO L225 Difference]: With dead ends: 875 [2023-12-02 14:40:27,413 INFO L226 Difference]: Without dead ends: 870 [2023-12-02 14:40:27,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=853, Invalid=3179, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 14:40:27,415 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 366 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:40:27,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 328 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:40:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-12-02 14:40:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 855. [2023-12-02 14:40:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 644 states have (on average 1.1832298136645962) internal successors, (762), 650 states have internal predecessors, (762), 186 states have call successors, (186), 25 states have call predecessors, (186), 24 states have return successors, (185), 179 states have call predecessors, (185), 185 states have call successors, (185) [2023-12-02 14:40:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1133 transitions. [2023-12-02 14:40:27,681 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1133 transitions. Word has length 94 [2023-12-02 14:40:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:40:27,681 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1133 transitions. [2023-12-02 14:40:27,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2023-12-02 14:40:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1133 transitions. [2023-12-02 14:40:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 14:40:27,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:40:27,685 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:40:27,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 14:40:27,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 14:40:27,886 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:40:27,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:40:27,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1927158023, now seen corresponding path program 4 times [2023-12-02 14:40:27,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:40:27,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238899794] [2023-12-02 14:40:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:40:27,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:40:27,896 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:40:27,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022314147] [2023-12-02 14:40:27,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:40:27,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:27,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:40:27,897 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:40:27,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 14:40:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:40:27,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:40:27,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:40:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2023-12-02 14:40:28,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:40:28,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:40:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238899794] [2023-12-02 14:40:28,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:40:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022314147] [2023-12-02 14:40:28,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022314147] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:40:28,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:40:28,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 14:40:28,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385972427] [2023-12-02 14:40:28,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:40:28,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:40:28,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:40:28,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:40:28,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:40:28,006 INFO L87 Difference]: Start difference. First operand 855 states and 1133 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 14:40:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:40:28,466 INFO L93 Difference]: Finished difference Result 1450 states and 1919 transitions. [2023-12-02 14:40:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:40:28,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 178 [2023-12-02 14:40:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:40:28,471 INFO L225 Difference]: With dead ends: 1450 [2023-12-02 14:40:28,471 INFO L226 Difference]: Without dead ends: 919 [2023-12-02 14:40:28,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:40:28,472 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:40:28,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 68 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:40:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2023-12-02 14:40:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 846. [2023-12-02 14:40:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 640 states have (on average 1.171875) internal successors, (750), 649 states have internal predecessors, (750), 181 states have call successors, (181), 25 states have call predecessors, (181), 24 states have return successors, (180), 171 states have call predecessors, (180), 180 states have call successors, (180) [2023-12-02 14:40:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1111 transitions. [2023-12-02 14:40:28,731 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1111 transitions. Word has length 178 [2023-12-02 14:40:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:40:28,731 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1111 transitions. [2023-12-02 14:40:28,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 14:40:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1111 transitions. [2023-12-02 14:40:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 14:40:28,736 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:40:28,736 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:40:28,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-02 14:40:28,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 14:40:28,937 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:40:28,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:40:28,937 INFO L85 PathProgramCache]: Analyzing trace with hash -545557597, now seen corresponding path program 5 times [2023-12-02 14:40:28,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:40:28,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567501241] [2023-12-02 14:40:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:40:28,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:40:28,948 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:40:28,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080726816] [2023-12-02 14:40:28,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:40:28,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:28,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:40:28,949 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:40:28,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 14:40:29,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 14:40:29,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:40:29,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:40:29,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:40:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1078 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 958 trivial. 0 not checked. [2023-12-02 14:40:29,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:40:29,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:40:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567501241] [2023-12-02 14:40:29,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:40:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080726816] [2023-12-02 14:40:29,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080726816] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:40:29,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:40:29,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:40:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623623879] [2023-12-02 14:40:29,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:40:29,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:40:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:40:29,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:40:29,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:40:29,378 INFO L87 Difference]: Start difference. First operand 846 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 14:40:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:40:29,648 INFO L93 Difference]: Finished difference Result 858 states and 1121 transitions. [2023-12-02 14:40:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:40:29,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 178 [2023-12-02 14:40:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:40:29,653 INFO L225 Difference]: With dead ends: 858 [2023-12-02 14:40:29,653 INFO L226 Difference]: Without dead ends: 807 [2023-12-02 14:40:29,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:40:29,654 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:40:29,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:40:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2023-12-02 14:40:30,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 792. [2023-12-02 14:40:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 598 states have (on average 1.1672240802675586) internal successors, (698), 605 states have internal predecessors, (698), 169 states have call successors, (169), 25 states have call predecessors, (169), 24 states have return successors, (168), 161 states have call predecessors, (168), 168 states have call successors, (168) [2023-12-02 14:40:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1035 transitions. [2023-12-02 14:40:30,033 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1035 transitions. Word has length 178 [2023-12-02 14:40:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:40:30,034 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1035 transitions. [2023-12-02 14:40:30,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 14:40:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1035 transitions. [2023-12-02 14:40:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 14:40:30,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:40:30,038 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:40:30,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 14:40:30,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:30,239 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:40:30,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:40:30,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1206804251, now seen corresponding path program 6 times [2023-12-02 14:40:30,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:40:30,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867541473] [2023-12-02 14:40:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:40:30,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:40:30,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:40:30,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007646408] [2023-12-02 14:40:30,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:40:30,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:30,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:40:30,255 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:40:30,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 14:40:30,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:40:30,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:40:30,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 14:40:30,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:40:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 280 proven. 184 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2023-12-02 14:40:30,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:40:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 140 proven. 184 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2023-12-02 14:40:30,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:40:30,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867541473] [2023-12-02 14:40:30,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:40:30,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007646408] [2023-12-02 14:40:30,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007646408] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:40:30,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682602075] [2023-12-02 14:40:30,595 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:40:30,595 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:40:30,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:40:30,595 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:40:30,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:40:32,442 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 14:40:32,445 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-12-02 14:40:32,505 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:40:36,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28066#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:40:36,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:40:36,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:40:36,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2023-12-02 14:40:36,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587222892] [2023-12-02 14:40:36,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:40:36,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 14:40:36,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:40:36,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 14:40:36,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2023-12-02 14:40:36,142 INFO L87 Difference]: Start difference. First operand 792 states and 1035 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2023-12-02 14:40:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:40:37,271 INFO L93 Difference]: Finished difference Result 1829 states and 2460 transitions. [2023-12-02 14:40:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 14:40:37,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) Word has length 178 [2023-12-02 14:40:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:40:37,279 INFO L225 Difference]: With dead ends: 1829 [2023-12-02 14:40:37,279 INFO L226 Difference]: Without dead ends: 1606 [2023-12-02 14:40:37,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 494 SyntacticMatches, 15 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 14:40:37,281 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 114 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:40:37,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1087 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:40:37,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2023-12-02 14:40:37,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1375. [2023-12-02 14:40:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1039 states have (on average 1.1828681424446583) internal successors, (1229), 1055 states have internal predecessors, (1229), 311 states have call successors, (311), 25 states have call predecessors, (311), 24 states have return successors, (310), 294 states have call predecessors, (310), 310 states have call successors, (310) [2023-12-02 14:40:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 1850 transitions. [2023-12-02 14:40:37,769 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 1850 transitions. Word has length 178 [2023-12-02 14:40:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:40:37,770 INFO L495 AbstractCegarLoop]: Abstraction has 1375 states and 1850 transitions. [2023-12-02 14:40:37,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 10 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 10 states have call predecessors, (21), 10 states have call successors, (21) [2023-12-02 14:40:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 1850 transitions. [2023-12-02 14:40:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 14:40:37,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:40:37,775 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:40:37,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 14:40:37,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:37,975 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:40:37,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:40:37,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1637608141, now seen corresponding path program 7 times [2023-12-02 14:40:37,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:40:37,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773252702] [2023-12-02 14:40:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:40:37,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:40:37,987 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:40:37,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311629054] [2023-12-02 14:40:37,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:40:37,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:37,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:40:37,989 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:40:37,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 14:40:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:40:38,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:40:38,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:40:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2023-12-02 14:40:38,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:40:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-12-02 14:40:38,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:40:38,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773252702] [2023-12-02 14:40:38,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:40:38,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311629054] [2023-12-02 14:40:38,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311629054] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:40:38,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183506853] [2023-12-02 14:40:38,413 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:40:38,413 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:40:38,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:40:38,414 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:40:38,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:40:40,360 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 14:40:40,362 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-12-02 14:40:40,410 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:40:42,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33963#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:40:42,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:40:42,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:40:42,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-02 14:40:42,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740120249] [2023-12-02 14:40:42,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:40:42,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 14:40:42,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:40:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 14:40:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2023-12-02 14:40:42,761 INFO L87 Difference]: Start difference. First operand 1375 states and 1850 transitions. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-12-02 14:40:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:40:45,085 INFO L93 Difference]: Finished difference Result 2960 states and 4046 transitions. [2023-12-02 14:40:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 14:40:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 178 [2023-12-02 14:40:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:40:45,100 INFO L225 Difference]: With dead ends: 2960 [2023-12-02 14:40:45,101 INFO L226 Difference]: Without dead ends: 2637 [2023-12-02 14:40:45,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 520 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=416, Invalid=2340, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 14:40:45,104 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 142 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:40:45,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 1191 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:40:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2023-12-02 14:40:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2039. [2023-12-02 14:40:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 1536 states have (on average 1.1725260416666667) internal successors, (1801), 1564 states have internal predecessors, (1801), 478 states have call successors, (478), 25 states have call predecessors, (478), 24 states have return successors, (477), 449 states have call predecessors, (477), 477 states have call successors, (477) [2023-12-02 14:40:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 2756 transitions. [2023-12-02 14:40:46,143 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 2756 transitions. Word has length 178 [2023-12-02 14:40:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:40:46,144 INFO L495 AbstractCegarLoop]: Abstraction has 2039 states and 2756 transitions. [2023-12-02 14:40:46,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-12-02 14:40:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 2756 transitions. [2023-12-02 14:40:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 14:40:46,154 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:40:46,154 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:40:46,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-02 14:40:46,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 14:40:46,355 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:40:46,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:40:46,355 INFO L85 PathProgramCache]: Analyzing trace with hash 270232805, now seen corresponding path program 8 times [2023-12-02 14:40:46,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:40:46,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279559770] [2023-12-02 14:40:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:40:46,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:40:46,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:40:46,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633316505] [2023-12-02 14:40:46,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:40:46,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:46,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:40:46,367 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:40:46,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 14:40:47,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 14:40:47,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:40:47,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 14:40:47,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:40:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2023-12-02 14:40:47,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:40:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 84 proven. 248 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2023-12-02 14:40:48,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:40:48,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279559770] [2023-12-02 14:40:48,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:40:48,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633316505] [2023-12-02 14:40:48,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633316505] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:40:48,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665337100] [2023-12-02 14:40:48,009 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:40:48,009 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:40:48,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:40:48,010 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:40:48,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:40:50,583 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 14:40:50,585 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-12-02 14:40:50,633 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:40:54,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42615#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:40:54,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:40:54,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:40:54,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2023-12-02 14:40:54,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420883319] [2023-12-02 14:40:54,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:40:54,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 14:40:54,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:40:54,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 14:40:54,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 14:40:54,040 INFO L87 Difference]: Start difference. First operand 2039 states and 2756 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2023-12-02 14:40:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:40:56,930 INFO L93 Difference]: Finished difference Result 3587 states and 4919 transitions. [2023-12-02 14:40:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-02 14:40:56,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) Word has length 178 [2023-12-02 14:40:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:40:56,945 INFO L225 Difference]: With dead ends: 3587 [2023-12-02 14:40:56,945 INFO L226 Difference]: Without dead ends: 3276 [2023-12-02 14:40:56,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 489 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=474, Invalid=3948, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 14:40:56,948 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 279 mSDsluCounter, 2388 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:40:56,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 2659 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:40:56,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2023-12-02 14:40:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2581. [2023-12-02 14:40:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 1946 states have (on average 1.183967112024666) internal successors, (2304), 1988 states have internal predecessors, (2304), 610 states have call successors, (610), 25 states have call predecessors, (610), 24 states have return successors, (609), 567 states have call predecessors, (609), 609 states have call successors, (609) [2023-12-02 14:40:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 3523 transitions. [2023-12-02 14:40:58,108 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 3523 transitions. Word has length 178 [2023-12-02 14:40:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:40:58,109 INFO L495 AbstractCegarLoop]: Abstraction has 2581 states and 3523 transitions. [2023-12-02 14:40:58,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 18 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2023-12-02 14:40:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 3523 transitions. [2023-12-02 14:40:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 14:40:58,117 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:40:58,117 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:40:58,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 14:40:58,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:58,318 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:40:58,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:40:58,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1152465125, now seen corresponding path program 9 times [2023-12-02 14:40:58,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:40:58,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680506323] [2023-12-02 14:40:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:40:58,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:40:58,332 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:40:58,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259763650] [2023-12-02 14:40:58,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:40:58,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:40:58,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:40:58,334 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:40:58,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 14:40:58,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:40:58,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:40:58,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 14:40:58,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:40:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 60 proven. 1044 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:40:58,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:40:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2023-12-02 14:40:59,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:40:59,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680506323] [2023-12-02 14:40:59,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:40:59,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259763650] [2023-12-02 14:40:59,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259763650] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:40:59,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2076752069] [2023-12-02 14:40:59,574 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:40:59,574 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:40:59,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:40:59,574 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:40:59,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:01,223 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 14:41:01,225 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2023-12-02 14:41:01,272 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:04,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53065#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:41:04,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:04,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:41:04,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2023-12-02 14:41:04,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190579578] [2023-12-02 14:41:04,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:04,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-02 14:41:04,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:04,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-02 14:41:04,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1252, Invalid=2408, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 14:41:04,897 INFO L87 Difference]: Start difference. First operand 2581 states and 3523 transitions. Second operand has 46 states, 46 states have (on average 4.3478260869565215) internal successors, (200), 46 states have internal predecessors, (200), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2023-12-02 14:41:11,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:11,114 INFO L93 Difference]: Finished difference Result 10562 states and 15878 transitions. [2023-12-02 14:41:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-12-02 14:41:11,115 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.3478260869565215) internal successors, (200), 46 states have internal predecessors, (200), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) Word has length 178 [2023-12-02 14:41:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:11,173 INFO L225 Difference]: With dead ends: 10562 [2023-12-02 14:41:11,173 INFO L226 Difference]: Without dead ends: 10459 [2023-12-02 14:41:11,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 463 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3032, Invalid=7068, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 14:41:11,179 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 919 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:11,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 625 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:41:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10459 states. [2023-12-02 14:41:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10459 to 10204. [2023-12-02 14:41:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10204 states, 7669 states have (on average 1.2558351805972094) internal successors, (9631), 7732 states have internal predecessors, (9631), 2490 states have call successors, (2490), 45 states have call predecessors, (2490), 44 states have return successors, (2489), 2426 states have call predecessors, (2489), 2489 states have call successors, (2489) [2023-12-02 14:41:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10204 states to 10204 states and 14610 transitions. [2023-12-02 14:41:15,663 INFO L78 Accepts]: Start accepts. Automaton has 10204 states and 14610 transitions. Word has length 178 [2023-12-02 14:41:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:15,664 INFO L495 AbstractCegarLoop]: Abstraction has 10204 states and 14610 transitions. [2023-12-02 14:41:15,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.3478260869565215) internal successors, (200), 46 states have internal predecessors, (200), 43 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2023-12-02 14:41:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand 10204 states and 14610 transitions. [2023-12-02 14:41:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-12-02 14:41:15,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:15,676 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:15,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-02 14:41:15,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:15,877 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:15,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash 859624940, now seen corresponding path program 2 times [2023-12-02 14:41:15,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:15,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048734371] [2023-12-02 14:41:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:15,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:15,889 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:41:15,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668199063] [2023-12-02 14:41:15,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:41:15,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:15,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:15,891 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:15,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 14:41:16,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-02 14:41:16,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:41:16,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 14:41:16,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:41:17,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2023-12-02 14:41:17,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:17,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048734371] [2023-12-02 14:41:17,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:41:17,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668199063] [2023-12-02 14:41:17,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668199063] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:17,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [80528015] [2023-12-02 14:41:17,839 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:41:17,839 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:17,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:17,839 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:17,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:19,784 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-12-02 14:41:19,787 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-12-02 14:41:19,824 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:22,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '85417#(and (<= ~counter~0 52) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:41:22,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:22,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:41:22,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2023-12-02 14:41:22,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530550420] [2023-12-02 14:41:22,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:22,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 14:41:22,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:22,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 14:41:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1466, Invalid=2694, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 14:41:22,758 INFO L87 Difference]: Start difference. First operand 10204 states and 14610 transitions. Second operand has 48 states, 48 states have (on average 4.3125) internal successors, (207), 48 states have internal predecessors, (207), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2023-12-02 14:41:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:28,102 INFO L93 Difference]: Finished difference Result 15319 states and 22102 transitions. [2023-12-02 14:41:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-12-02 14:41:28,103 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.3125) internal successors, (207), 48 states have internal predecessors, (207), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) Word has length 184 [2023-12-02 14:41:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:28,145 INFO L225 Difference]: With dead ends: 15319 [2023-12-02 14:41:28,145 INFO L226 Difference]: Without dead ends: 7786 [2023-12-02 14:41:28,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 462 SyntacticMatches, 25 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4282 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3413, Invalid=7717, Unknown=0, NotChecked=0, Total=11130 [2023-12-02 14:41:28,163 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 882 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:28,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 595 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:41:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7786 states. [2023-12-02 14:41:31,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7786 to 7555. [2023-12-02 14:41:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7555 states, 5667 states have (on average 1.1838715369684136) internal successors, (6709), 5715 states have internal predecessors, (6709), 1841 states have call successors, (1841), 47 states have call predecessors, (1841), 46 states have return successors, (1840), 1792 states have call predecessors, (1840), 1840 states have call successors, (1840) [2023-12-02 14:41:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7555 states to 7555 states and 10390 transitions. [2023-12-02 14:41:31,791 INFO L78 Accepts]: Start accepts. Automaton has 7555 states and 10390 transitions. Word has length 184 [2023-12-02 14:41:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:31,791 INFO L495 AbstractCegarLoop]: Abstraction has 7555 states and 10390 transitions. [2023-12-02 14:41:31,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.3125) internal successors, (207), 48 states have internal predecessors, (207), 45 states have call successors, (47), 24 states have call predecessors, (47), 23 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2023-12-02 14:41:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 7555 states and 10390 transitions. [2023-12-02 14:41:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-12-02 14:41:31,798 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:31,799 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:31,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-02 14:41:31,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 14:41:31,999 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:32,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1661800691, now seen corresponding path program 2 times [2023-12-02 14:41:32,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:32,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112573590] [2023-12-02 14:41:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:32,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:32,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:41:32,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614084434] [2023-12-02 14:41:32,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:41:32,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:32,011 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:32,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 14:41:32,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-02 14:41:32,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:41:32,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 14:41:32,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1294 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:41:33,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1294 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2023-12-02 14:41:33,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:33,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112573590] [2023-12-02 14:41:33,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:41:33,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614084434] [2023-12-02 14:41:33,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614084434] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:33,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242391441] [2023-12-02 14:41:33,789 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:41:33,789 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:33,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:33,789 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:33,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:36,170 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 99 for LOIs [2023-12-02 14:41:36,275 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-12-02 14:41:36,312 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:41:40,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '120959#(and (<= 1 |#StackHeapBarrier|) (<= ~counter~0 51) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:41:40,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:41:40,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:41:40,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2023-12-02 14:41:40,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119536740] [2023-12-02 14:41:40,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:41:40,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 14:41:40,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:41:40,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 14:41:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2023-12-02 14:41:40,854 INFO L87 Difference]: Start difference. First operand 7555 states and 10390 transitions. Second operand has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2023-12-02 14:41:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:41:46,062 INFO L93 Difference]: Finished difference Result 8195 states and 11310 transitions. [2023-12-02 14:41:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-02 14:41:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 190 [2023-12-02 14:41:46,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:41:46,083 INFO L225 Difference]: With dead ends: 8195 [2023-12-02 14:41:46,084 INFO L226 Difference]: Without dead ends: 8048 [2023-12-02 14:41:46,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 496 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3349, Invalid=9083, Unknown=0, NotChecked=0, Total=12432 [2023-12-02 14:41:46,088 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 796 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:41:46,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 566 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:41:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8048 states. [2023-12-02 14:41:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8048 to 7339. [2023-12-02 14:41:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7339 states, 5514 states have (on average 1.1267682263329706) internal successors, (6213), 5558 states have internal predecessors, (6213), 1776 states have call successors, (1776), 49 states have call predecessors, (1776), 48 states have return successors, (1775), 1731 states have call predecessors, (1775), 1775 states have call successors, (1775) [2023-12-02 14:41:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7339 states to 7339 states and 9764 transitions. [2023-12-02 14:41:49,141 INFO L78 Accepts]: Start accepts. Automaton has 7339 states and 9764 transitions. Word has length 190 [2023-12-02 14:41:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:41:49,142 INFO L495 AbstractCegarLoop]: Abstraction has 7339 states and 9764 transitions. [2023-12-02 14:41:49,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2023-12-02 14:41:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 7339 states and 9764 transitions. [2023-12-02 14:41:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-12-02 14:41:49,169 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:41:49,169 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:41:49,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 14:41:49,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 14:41:49,370 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:41:49,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:41:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1362279951, now seen corresponding path program 10 times [2023-12-02 14:41:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:41:49,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180057382] [2023-12-02 14:41:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:41:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:41:49,388 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:41:49,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127662833] [2023-12-02 14:41:49,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:41:49,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:41:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:41:49,390 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:41:49,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 14:41:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:41:49,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 14:41:49,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:41:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 416 proven. 1164 refuted. 0 times theorem prover too weak. 3690 trivial. 0 not checked. [2023-12-02 14:41:50,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:41:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 266 proven. 1204 refuted. 0 times theorem prover too weak. 3800 trivial. 0 not checked. [2023-12-02 14:41:50,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:41:50,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180057382] [2023-12-02 14:41:50,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:41:50,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127662833] [2023-12-02 14:41:50,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127662833] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:41:50,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297442744] [2023-12-02 14:41:50,760 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:41:50,760 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:41:50,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:41:50,760 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:41:50,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:41:54,925 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 14:41:54,927 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-12-02 14:41:54,965 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:42:02,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '146563#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:42:02,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:42:02,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:42:02,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2023-12-02 14:42:02,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324888091] [2023-12-02 14:42:02,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:42:02,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 14:42:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:42:02,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 14:42:02,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2009, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 14:42:02,077 INFO L87 Difference]: Start difference. First operand 7339 states and 9764 transitions. Second operand has 32 states, 32 states have (on average 7.34375) internal successors, (235), 32 states have internal predecessors, (235), 32 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (74), 32 states have call predecessors, (74), 32 states have call successors, (74) [2023-12-02 14:42:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:42:08,070 INFO L93 Difference]: Finished difference Result 10729 states and 14284 transitions. [2023-12-02 14:42:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 14:42:08,070 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 7.34375) internal successors, (235), 32 states have internal predecessors, (235), 32 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (74), 32 states have call predecessors, (74), 32 states have call successors, (74) Word has length 370 [2023-12-02 14:42:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:42:08,089 INFO L225 Difference]: With dead ends: 10729 [2023-12-02 14:42:08,089 INFO L226 Difference]: Without dead ends: 8971 [2023-12-02 14:42:08,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1044 SyntacticMatches, 19 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=549, Invalid=5001, Unknown=0, NotChecked=0, Total=5550 [2023-12-02 14:42:08,095 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 310 mSDsluCounter, 4267 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 4515 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:42:08,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 4515 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 14:42:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2023-12-02 14:42:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 7452. [2023-12-02 14:42:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7452 states, 5599 states have (on average 1.1269869619574924) internal successors, (6310), 5644 states have internal predecessors, (6310), 1804 states have call successors, (1804), 49 states have call predecessors, (1804), 48 states have return successors, (1803), 1758 states have call predecessors, (1803), 1803 states have call successors, (1803) [2023-12-02 14:42:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7452 states to 7452 states and 9917 transitions. [2023-12-02 14:42:11,567 INFO L78 Accepts]: Start accepts. Automaton has 7452 states and 9917 transitions. Word has length 370 [2023-12-02 14:42:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:42:11,568 INFO L495 AbstractCegarLoop]: Abstraction has 7452 states and 9917 transitions. [2023-12-02 14:42:11,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.34375) internal successors, (235), 32 states have internal predecessors, (235), 32 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (74), 32 states have call predecessors, (74), 32 states have call successors, (74) [2023-12-02 14:42:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 7452 states and 9917 transitions. [2023-12-02 14:42:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-12-02 14:42:11,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:42:11,591 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:42:11,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 14:42:11,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 14:42:11,792 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:42:11,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:42:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1162611185, now seen corresponding path program 11 times [2023-12-02 14:42:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:42:11,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768888347] [2023-12-02 14:42:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:42:11,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:42:11,814 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:42:11,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976380210] [2023-12-02 14:42:11,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:42:11,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:42:11,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:42:11,815 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:42:11,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 14:42:12,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-12-02 14:42:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:42:12,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 14:42:12,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:42:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 176 proven. 1288 refuted. 0 times theorem prover too weak. 3806 trivial. 0 not checked. [2023-12-02 14:42:13,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:42:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 240 proven. 1224 refuted. 0 times theorem prover too weak. 3806 trivial. 0 not checked. [2023-12-02 14:42:13,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:42:13,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768888347] [2023-12-02 14:42:13,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:42:13,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976380210] [2023-12-02 14:42:13,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976380210] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:42:13,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2003629309] [2023-12-02 14:42:13,962 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:42:13,962 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:42:13,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:42:13,963 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:42:13,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:42:15,524 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 14:42:15,526 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-12-02 14:42:15,564 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:42:27,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '176097#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:42:27,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:42:27,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:42:27,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2023-12-02 14:42:27,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910268311] [2023-12-02 14:42:27,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:42:27,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 14:42:27,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:42:27,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 14:42:27,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1909, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 14:42:27,864 INFO L87 Difference]: Start difference. First operand 7452 states and 9917 transitions. Second operand has 31 states, 31 states have (on average 7.32258064516129) internal successors, (227), 31 states have internal predecessors, (227), 31 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (71), 30 states have call predecessors, (71), 30 states have call successors, (71) [2023-12-02 14:43:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:07,334 INFO L93 Difference]: Finished difference Result 43261 states and 58753 transitions. [2023-12-02 14:43:07,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2023-12-02 14:43:07,335 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 7.32258064516129) internal successors, (227), 31 states have internal predecessors, (227), 31 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (71), 30 states have call predecessors, (71), 30 states have call successors, (71) Word has length 370 [2023-12-02 14:43:07,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:07,447 INFO L225 Difference]: With dead ends: 43261 [2023-12-02 14:43:07,447 INFO L226 Difference]: Without dead ends: 40918 [2023-12-02 14:43:07,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1370 GetRequests, 1041 SyntacticMatches, 23 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36544 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=8571, Invalid=85985, Unknown=0, NotChecked=0, Total=94556 [2023-12-02 14:43:07,484 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 1111 mSDsluCounter, 7890 mSDsCounter, 0 mSdLazyCounter, 4148 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 8423 SdHoareTripleChecker+Invalid, 4477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 4148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:07,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 8423 Invalid, 4477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 4148 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 14:43:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40918 states. [2023-12-02 14:43:22,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40918 to 28822. [2023-12-02 14:43:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28822 states, 21642 states have (on average 1.149524073560669) internal successors, (24878), 21825 states have internal predecessors, (24878), 7131 states have call successors, (7131), 49 states have call predecessors, (7131), 48 states have return successors, (7130), 6947 states have call predecessors, (7130), 7130 states have call successors, (7130) [2023-12-02 14:43:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28822 states to 28822 states and 39139 transitions. [2023-12-02 14:43:22,407 INFO L78 Accepts]: Start accepts. Automaton has 28822 states and 39139 transitions. Word has length 370 [2023-12-02 14:43:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:22,408 INFO L495 AbstractCegarLoop]: Abstraction has 28822 states and 39139 transitions. [2023-12-02 14:43:22,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.32258064516129) internal successors, (227), 31 states have internal predecessors, (227), 31 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (71), 30 states have call predecessors, (71), 30 states have call successors, (71) [2023-12-02 14:43:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 28822 states and 39139 transitions. [2023-12-02 14:43:22,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2023-12-02 14:43:22,491 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:22,491 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 20, 19, 19, 19, 17, 16, 16, 16, 11, 10, 9, 9, 9, 9, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:22,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-02 14:43:22,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 14:43:22,692 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:43:22,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1350397425, now seen corresponding path program 12 times [2023-12-02 14:43:22,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:22,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070410184] [2023-12-02 14:43:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:22,707 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:43:22,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465201459] [2023-12-02 14:43:22,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:43:22,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:22,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:22,709 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:22,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83c92d9-84f9-41c5-8fab-aca711d0ecc8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 14:43:22,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:43:22,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:43:22,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-02 14:43:22,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:45:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5270 backedges. 2811 proven. 757 refuted. 2 times theorem prover too weak. 1700 trivial. 0 not checked. [2023-12-02 14:45:19,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:45:21,846 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~v~0#1| Int) (|ULTIMATE.start_main_~r~0#1| Int) (|ULTIMATE.start_main_~u~0#1| Int)) (not (= (+ (* |ULTIMATE.start_main_~r~0#1| 4) (* |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~v~0#1|) (* |c_ULTIMATE.start_main_~A~0#1| 4) (* 2 |ULTIMATE.start_main_~u~0#1|)) (+ (* 2 |ULTIMATE.start_main_~v~0#1|) (* |ULTIMATE.start_main_~u~0#1| |ULTIMATE.start_main_~u~0#1|))))) is different from false [2023-12-02 14:45:21,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:45:21,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070410184] [2023-12-02 14:45:21,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:45:21,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465201459] [2023-12-02 14:45:21,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465201459] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:45:21,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743541790] [2023-12-02 14:45:21,851 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 14:45:21,851 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:45:21,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:45:21,852 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:45:21,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:45:23,484 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-12-02 14:45:23,488 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2023-12-02 14:45:23,527 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:46:01,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '286149#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:46:01,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:46:01,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:46:01,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-12-02 14:46:01,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455530277] [2023-12-02 14:46:01,077 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 14:46:01,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 14:46:01,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:46:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 14:46:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1560, Unknown=22, NotChecked=80, Total=1806 [2023-12-02 14:46:01,078 INFO L87 Difference]: Start difference. First operand 28822 states and 39139 transitions. Second operand has 27 states, 26 states have (on average 4.384615384615385) internal successors, (114), 20 states have internal predecessors, (114), 17 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (34), 23 states have call predecessors, (34), 17 states have call successors, (34) [2023-12-02 14:46:03,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:05,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:07,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:09,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:12,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:14,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:16,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:18,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:20,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:22,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:24,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:26,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:28,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:30,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:32,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:34,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:36,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-02 14:46:38,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:40,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:46,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:48,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:50,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:52,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:54,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:56,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:46:59,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:01,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:03,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:05,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:07,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:09,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:11,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:13,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:16,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:18,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:20,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:22,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:24,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:27,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:29,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:31,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:34,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:36,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:38,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:40,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:42,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:44,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:46,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:48,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:50,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:53,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:56,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:47:58,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:00,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:02,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:04,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:06,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:08,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:10,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:12,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:14,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:16,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:19,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:21,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:23,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:25,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:27,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:29,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:31,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:33,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:36,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:38,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:40,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:42,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:45,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:47,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:49,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:51,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:53,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:55,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:48:58,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:00,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:02,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:04,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:06,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:09,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:11,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:13,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:15,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:17,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:19,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:22,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:24,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:26,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:28,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:31,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:33,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:35,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:38,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:40,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:42,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:45,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:47,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:49,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:51,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:53,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:56,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:49:58,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:00,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:02,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:05,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:07,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:10,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:12,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:17,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:19,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:21,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:24,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:26,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:29,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:31,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:34,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:37,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:39,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:42,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:45,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:47,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:49,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:51,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:54,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:56,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:50:59,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:51:01,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:51:03,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:51:06,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:51:09,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:51:51,274 WARN L293 SmtUtils]: Spent 26.73s on a formula simplification. DAG size of input: 100 DAG size of output: 114 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:51:52,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:51:54,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:51:57,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:51:59,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:01,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:06,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:12,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:13,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:24,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:26,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:29,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:31,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:33,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:35,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:37,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:39,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:42,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:44,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:46,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:48,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:50,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:52,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:54,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:56,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:52:58,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:53:00,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:53:02,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:53:05,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-02 14:53:07,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]