/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:41:14,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:41:14,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:41:14,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:41:14,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:41:14,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:41:14,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:41:14,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:41:14,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:41:14,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:41:14,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:41:14,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:41:14,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:41:14,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:41:14,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:41:14,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:41:14,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:41:14,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:41:14,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:41:14,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:41:14,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:41:14,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:41:14,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:41:14,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:41:14,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:41:14,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:41:14,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:41:14,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:41:14,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:41:14,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:41:14,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:41:14,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:41:14,331 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:41:14,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:41:14,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:41:14,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:41:14,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:41:14,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:41:14,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:41:14,333 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:41:14,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:41:14,334 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:41:14,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:41:14,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:41:14,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:41:14,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:41:14,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:41:14,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:41:14,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:41:14,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:41:14,336 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:41:14,337 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:41:14,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:41:14,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:41:14,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:41:14,682 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:41:14,683 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:41:14,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2021-05-02 21:41:14,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e2cf3e8e/3646a7782a2748138fe17f09930dff79/FLAG603e18bad [2021-05-02 21:41:15,136 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:41:15,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2021-05-02 21:41:15,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e2cf3e8e/3646a7782a2748138fe17f09930dff79/FLAG603e18bad [2021-05-02 21:41:15,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e2cf3e8e/3646a7782a2748138fe17f09930dff79 [2021-05-02 21:41:15,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:41:15,545 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:41:15,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:41:15,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:41:15,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:41:15,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:41:15" (1/1) ... [2021-05-02 21:41:15,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f4a9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15, skipping insertion in model container [2021-05-02 21:41:15,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:41:15" (1/1) ... [2021-05-02 21:41:15,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:41:15,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:41:15,692 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound10.c[524,537] [2021-05-02 21:41:15,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:41:15,718 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:41:15,739 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound10.c[524,537] [2021-05-02 21:41:15,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:41:15,779 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:41:15,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15 WrapperNode [2021-05-02 21:41:15,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:41:15,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:41:15,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:41:15,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:41:15,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15" (1/1) ... [2021-05-02 21:41:15,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15" (1/1) ... [2021-05-02 21:41:15,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15" (1/1) ... [2021-05-02 21:41:15,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15" (1/1) ... [2021-05-02 21:41:15,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15" (1/1) ... [2021-05-02 21:41:15,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15" (1/1) ... [2021-05-02 21:41:15,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15" (1/1) ... [2021-05-02 21:41:15,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:41:15,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:41:15,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:41:15,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:41:15,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:41:15,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:41:15,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:41:15,877 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:41:15,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:41:15,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:41:15,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:41:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:41:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:41:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:41:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:41:15,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:41:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:41:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:41:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:41:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:41:15,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:41:15,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:41:15,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:41:15,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:41:15,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:41:16,080 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:41:16,080 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:41:16,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:41:16 BoogieIcfgContainer [2021-05-02 21:41:16,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:41:16,082 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:41:16,082 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:41:16,083 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:41:16,085 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:41:16" (1/1) ... [2021-05-02 21:41:16,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:41:16 BasicIcfg [2021-05-02 21:41:16,099 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:41:16,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:41:16,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:41:16,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:41:16,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:41:15" (1/4) ... [2021-05-02 21:41:16,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a761ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:41:16, skipping insertion in model container [2021-05-02 21:41:16,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:41:15" (2/4) ... [2021-05-02 21:41:16,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a761ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:41:16, skipping insertion in model container [2021-05-02 21:41:16,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:41:16" (3/4) ... [2021-05-02 21:41:16,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a761ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:41:16, skipping insertion in model container [2021-05-02 21:41:16,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:41:16" (4/4) ... [2021-05-02 21:41:16,105 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound10.cJordan [2021-05-02 21:41:16,109 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:41:16,113 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:41:16,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:41:16,137 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:41:16,137 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:41:16,137 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:41:16,137 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:41:16,138 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:41:16,138 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:41:16,138 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:41:16,138 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:41:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:41:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 21:41:16,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:16,151 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:16,152 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:16,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2021-05-02 21:41:16,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:16,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175300221] [2021-05-02 21:41:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:16,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:41:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:16,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:41:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:16,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:16,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175300221] [2021-05-02 21:41:16,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175300221] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:41:16,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:41:16,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:41:16,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930413084] [2021-05-02 21:41:16,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:41:16,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:16,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:41:16,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:41:16,347 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:41:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:16,439 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-02 21:41:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:41:16,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 21:41:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:16,447 INFO L225 Difference]: With dead ends: 33 [2021-05-02 21:41:16,467 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 21:41:16,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:41:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 21:41:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 21:41:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:41:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-02 21:41:16,502 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-02 21:41:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:16,502 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-02 21:41:16,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:41:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-02 21:41:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:41:16,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:16,504 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:16,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:41:16,504 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2021-05-02 21:41:16,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:16,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682110436] [2021-05-02 21:41:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:16,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:16,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944002318] [2021-05-02 21:41:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:16,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:41:16,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:16,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:16,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:16,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:16,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:16,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:16,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:16,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682110436] [2021-05-02 21:41:16,765 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:16,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944002318] [2021-05-02 21:41:16,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944002318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:41:16,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:41:16,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:41:16,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357233535] [2021-05-02 21:41:16,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:41:16,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:41:16,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:41:16,769 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:41:16,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:16,783 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-05-02 21:41:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:41:16,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 21:41:16,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:16,785 INFO L225 Difference]: With dead ends: 29 [2021-05-02 21:41:16,785 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 21:41:16,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:41:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 21:41:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 21:41:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:41:16,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 21:41:16,798 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-02 21:41:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:16,799 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 21:41:16,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:41:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 21:41:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:41:16,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:16,803 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:17,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:41:17,004 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:17,004 INFO L82 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2021-05-02 21:41:17,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:17,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337117062] [2021-05-02 21:41:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:17,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:17,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598186938] [2021-05-02 21:41:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 21:41:17,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:17,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:17,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:17,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337117062] [2021-05-02 21:41:17,245 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:17,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598186938] [2021-05-02 21:41:17,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598186938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:41:17,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:41:17,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 21:41:17,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011368861] [2021-05-02 21:41:17,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:41:17,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:17,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:41:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:41:17,248 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:41:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:17,358 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-02 21:41:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:41:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 21:41:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:17,360 INFO L225 Difference]: With dead ends: 40 [2021-05-02 21:41:17,360 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 21:41:17,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:41:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 21:41:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-02 21:41:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:41:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-02 21:41:17,371 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-02 21:41:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:17,371 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-02 21:41:17,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:41:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-02 21:41:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 21:41:17,372 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:17,372 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:17,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:17,589 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:17,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2021-05-02 21:41:17,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:17,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146427235] [2021-05-02 21:41:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:17,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:17,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604474422] [2021-05-02 21:41:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:41:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:17,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:17,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:17,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146427235] [2021-05-02 21:41:17,912 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:17,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604474422] [2021-05-02 21:41:17,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604474422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:41:17,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:41:17,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:41:17,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844599349] [2021-05-02 21:41:17,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:41:17,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:17,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:41:17,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:41:17,914 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:18,288 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-05-02 21:41:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 21:41:18,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 21:41:18,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:18,291 INFO L225 Difference]: With dead ends: 49 [2021-05-02 21:41:18,291 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 21:41:18,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 21:41:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 21:41:18,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 21:41:18,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:41:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 21:41:18,296 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-02 21:41:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:18,296 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 21:41:18,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 21:41:18,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 21:41:18,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:18,298 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:18,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:18,509 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2021-05-02 21:41:18,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:18,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574323633] [2021-05-02 21:41:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:18,520 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:18,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744040953] [2021-05-02 21:41:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:18,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:41:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:18,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:18,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:18,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:18,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:18,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:18,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:18,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:18,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:18,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574323633] [2021-05-02 21:41:18,632 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:18,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744040953] [2021-05-02 21:41:18,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744040953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:41:18,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:41:18,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 21:41:18,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389919795] [2021-05-02 21:41:18,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:41:18,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:18,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:41:18,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:41:18,634 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:41:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:18,657 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 21:41:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:41:18,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-02 21:41:18,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:18,658 INFO L225 Difference]: With dead ends: 48 [2021-05-02 21:41:18,658 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 21:41:18,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:41:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 21:41:18,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 21:41:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:41:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-05-02 21:41:18,663 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 27 [2021-05-02 21:41:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:18,663 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-05-02 21:41:18,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:41:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-05-02 21:41:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 21:41:18,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:18,664 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:18,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:18,885 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:18,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:18,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2116787731, now seen corresponding path program 1 times [2021-05-02 21:41:18,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:18,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737803266] [2021-05-02 21:41:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:18,895 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:18,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335399277] [2021-05-02 21:41:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:18,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 21:41:18,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:19,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:19,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:19,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737803266] [2021-05-02 21:41:19,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:19,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335399277] [2021-05-02 21:41:19,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335399277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:41:19,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:41:19,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 21:41:19,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170565876] [2021-05-02 21:41:19,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 21:41:19,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:19,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 21:41:19,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 21:41:19,286 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:23,776 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-05-02 21:41:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 21:41:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 21:41:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:23,777 INFO L225 Difference]: With dead ends: 61 [2021-05-02 21:41:23,777 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 21:41:23,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 21:41:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 21:41:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-02 21:41:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 21:41:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 21:41:23,783 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-05-02 21:41:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:23,783 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 21:41:23,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 21:41:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:41:23,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:23,784 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:23,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:23,989 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1857795251, now seen corresponding path program 1 times [2021-05-02 21:41:23,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:23,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462745223] [2021-05-02 21:41:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:23,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:23,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507928364] [2021-05-02 21:41:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:24,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 21:41:24,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:24,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:24,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:24,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:24,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:24,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:24,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462745223] [2021-05-02 21:41:24,234 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:24,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507928364] [2021-05-02 21:41:24,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507928364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:41:24,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:41:24,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 21:41:24,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456135620] [2021-05-02 21:41:24,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 21:41:24,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:24,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 21:41:24,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 21:41:24,236 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:26,673 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2021-05-02 21:41:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 21:41:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:41:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:26,676 INFO L225 Difference]: With dead ends: 64 [2021-05-02 21:41:26,676 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 21:41:26,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 21:41:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 21:41:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 21:41:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 21:41:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-05-02 21:41:26,681 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2021-05-02 21:41:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:26,682 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-05-02 21:41:26,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-05-02 21:41:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 21:41:26,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:26,683 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 21:41:26,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:26,883 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2004143825, now seen corresponding path program 1 times [2021-05-02 21:41:26,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:26,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406779197] [2021-05-02 21:41:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:26,892 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:26,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529202147] [2021-05-02 21:41:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:27,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 21:41:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:27,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:27,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:27,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:27,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:27,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:27,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406779197] [2021-05-02 21:41:27,205 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:27,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529202147] [2021-05-02 21:41:27,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529202147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:41:27,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:41:27,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 21:41:27,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636148372] [2021-05-02 21:41:27,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 21:41:27,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:27,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 21:41:27,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 21:41:27,207 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:32,119 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2021-05-02 21:41:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 21:41:32,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 21:41:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:32,120 INFO L225 Difference]: With dead ends: 77 [2021-05-02 21:41:32,120 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 21:41:32,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 21:41:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 21:41:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-02 21:41:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 21:41:32,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-05-02 21:41:32,126 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 29 [2021-05-02 21:41:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:32,126 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-05-02 21:41:32,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-05-02 21:41:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 21:41:32,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:32,127 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 21:41:32,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:32,333 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:32,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1116640144, now seen corresponding path program 1 times [2021-05-02 21:41:32,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:32,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242705647] [2021-05-02 21:41:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:32,340 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:32,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688111431] [2021-05-02 21:41:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:32,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 21:41:32,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:32,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:32,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:32,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:32,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:32,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:32,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242705647] [2021-05-02 21:41:32,552 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:32,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688111431] [2021-05-02 21:41:32,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688111431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:41:32,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:41:32,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 21:41:32,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933721786] [2021-05-02 21:41:32,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 21:41:32,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:32,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 21:41:32,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 21:41:32,553 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:32,722 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2021-05-02 21:41:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 21:41:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 21:41:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:32,724 INFO L225 Difference]: With dead ends: 85 [2021-05-02 21:41:32,724 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 21:41:32,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 21:41:32,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 21:41:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-02 21:41:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 21:41:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-05-02 21:41:32,729 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 29 [2021-05-02 21:41:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:32,729 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-05-02 21:41:32,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:41:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-05-02 21:41:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 21:41:32,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:32,730 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:32,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 21:41:32,945 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:32,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:32,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1454559031, now seen corresponding path program 1 times [2021-05-02 21:41:32,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:32,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672218670] [2021-05-02 21:41:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:32,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:32,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103135708] [2021-05-02 21:41:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 21:41:33,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:33,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:41:33,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:33,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672218670] [2021-05-02 21:41:33,137 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:33,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103135708] [2021-05-02 21:41:33,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103135708] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:41:33,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:41:33,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 21:41:33,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070492437] [2021-05-02 21:41:33,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 21:41:33,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:33,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 21:41:33,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 21:41:33,138 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:41:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:33,214 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2021-05-02 21:41:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 21:41:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-02 21:41:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:33,216 INFO L225 Difference]: With dead ends: 90 [2021-05-02 21:41:33,216 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 21:41:33,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:41:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 21:41:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2021-05-02 21:41:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 21:41:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-05-02 21:41:33,222 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 33 [2021-05-02 21:41:33,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:33,222 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-05-02 21:41:33,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:41:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-05-02 21:41:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 21:41:33,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:33,224 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 21:41:33,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:33,429 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:33,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:33,429 INFO L82 PathProgramCache]: Analyzing trace with hash 482870923, now seen corresponding path program 1 times [2021-05-02 21:41:33,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:33,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987831434] [2021-05-02 21:41:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:33,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:33,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227068773] [2021-05-02 21:41:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:33,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 21:41:33,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:33,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:41:33,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:33,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987831434] [2021-05-02 21:41:33,755 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:33,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227068773] [2021-05-02 21:41:33,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227068773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:41:33,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:41:33,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 21:41:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771433932] [2021-05-02 21:41:33,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 21:41:33,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 21:41:33,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 21:41:33,756 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:41:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:36,063 INFO L93 Difference]: Finished difference Result 101 states and 135 transitions. [2021-05-02 21:41:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 21:41:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 21:41:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:36,064 INFO L225 Difference]: With dead ends: 101 [2021-05-02 21:41:36,064 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 21:41:36,065 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-02 21:41:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 21:41:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-05-02 21:41:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 73 states have internal predecessors, (92), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 21:41:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2021-05-02 21:41:36,070 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 35 [2021-05-02 21:41:36,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:36,071 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2021-05-02 21:41:36,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:41:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2021-05-02 21:41:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 21:41:36,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:36,072 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 21:41:36,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 21:41:36,281 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash 189467916, now seen corresponding path program 1 times [2021-05-02 21:41:36,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:36,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610790869] [2021-05-02 21:41:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:36,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:36,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476182998] [2021-05-02 21:41:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:41:36,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 21:41:36,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:36,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:41:36,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:36,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610790869] [2021-05-02 21:41:36,578 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:36,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476182998] [2021-05-02 21:41:36,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476182998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:41:36,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:41:36,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 21:41:36,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813937576] [2021-05-02 21:41:36,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 21:41:36,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 21:41:36,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 21:41:36,579 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:41:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:37,514 INFO L93 Difference]: Finished difference Result 121 states and 161 transitions. [2021-05-02 21:41:37,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 21:41:37,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 21:41:37,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:37,516 INFO L225 Difference]: With dead ends: 121 [2021-05-02 21:41:37,516 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 21:41:37,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-05-02 21:41:37,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 21:41:37,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-05-02 21:41:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 79 states have internal predecessors, (101), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 21:41:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2021-05-02 21:41:37,523 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 35 [2021-05-02 21:41:37,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:37,523 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2021-05-02 21:41:37,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:41:37,523 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2021-05-02 21:41:37,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 21:41:37,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:37,524 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:37,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 21:41:37,733 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:37,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1979136443, now seen corresponding path program 2 times [2021-05-02 21:41:37,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:37,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717132896] [2021-05-02 21:41:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:37,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:37,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474668811] [2021-05-02 21:41:37,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:37,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:41:37,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:41:37,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 21:41:37,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:37,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:41:37,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:41:37,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717132896] [2021-05-02 21:41:37,872 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:41:37,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474668811] [2021-05-02 21:41:37,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474668811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:41:37,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:41:37,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 21:41:37,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880638538] [2021-05-02 21:41:37,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:41:37,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:41:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:41:37,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:41:37,873 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:41:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:41:37,918 INFO L93 Difference]: Finished difference Result 120 states and 157 transitions. [2021-05-02 21:41:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:41:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 21:41:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:41:37,919 INFO L225 Difference]: With dead ends: 120 [2021-05-02 21:41:37,919 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 21:41:37,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:41:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 21:41:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-05-02 21:41:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.3297872340425532) internal successors, (125), 96 states have internal predecessors, (125), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 21:41:37,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 157 transitions. [2021-05-02 21:41:37,925 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 157 transitions. Word has length 36 [2021-05-02 21:41:37,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:41:37,925 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 157 transitions. [2021-05-02 21:41:37,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:41:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 157 transitions. [2021-05-02 21:41:37,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 21:41:37,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:41:37,926 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:41:38,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:38,149 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:41:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:41:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1980238710, now seen corresponding path program 2 times [2021-05-02 21:41:38,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:41:38,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543682215] [2021-05-02 21:41:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:41:38,155 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:41:38,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827355588] [2021-05-02 21:41:38,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:41:38,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:41:38,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:41:38,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 21:41:38,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:41:38,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:38,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:38,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:38,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:38,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:38,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:41:52,542 WARN L205 SmtUtils]: Spent 12.15 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 21:42:04,718 WARN L205 SmtUtils]: Spent 12.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 21:42:04,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:04,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:05,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:05,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:05,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:05,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:05,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:05,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:05,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:05,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:05,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:06,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:06,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:06,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:06,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:06,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:42:06,632 WARN L159 QuantifierPusher]: Ignoring assumption.