/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/divbin_unwindbound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:11:27,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:11:27,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:11:27,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:11:27,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:11:27,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:11:27,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:11:27,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:11:27,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:11:27,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:11:27,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:11:27,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:11:27,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:11:27,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:11:27,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:11:27,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:11:27,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:11:27,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:11:27,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:11:27,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:11:27,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:11:27,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:11:27,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:11:27,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:11:27,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:11:27,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:11:27,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:11:27,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:11:27,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:11:27,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:11:27,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:11:27,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:11:27,089 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:11:27,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:11:27,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:11:27,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:11:27,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:11:27,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:11:27,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:11:27,090 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:11:27,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:11:27,090 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:11:27,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:11:27,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:11:27,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:11:27,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:11:27,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:11:27,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:11:27,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:11:27,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:11:27,092 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:11:27,092 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:11:27,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:11:27,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:11:27,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:11:27,325 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:11:27,325 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:11:27,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound20.i [2021-05-02 20:11:27,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a845ed7b/49adf8fb80d3477aaffce217a1d2c956/FLAG902341576 [2021-05-02 20:11:27,767 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:11:27,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound20.i [2021-05-02 20:11:27,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a845ed7b/49adf8fb80d3477aaffce217a1d2c956/FLAG902341576 [2021-05-02 20:11:28,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a845ed7b/49adf8fb80d3477aaffce217a1d2c956 [2021-05-02 20:11:28,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:11:28,198 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:11:28,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:11:28,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:11:28,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:11:28,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:11:28" (1/1) ... [2021-05-02 20:11:28,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d39e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28, skipping insertion in model container [2021-05-02 20:11:28,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:11:28" (1/1) ... [2021-05-02 20:11:28,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:11:28,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:11:28,343 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/divbin_unwindbound20.i[958,971] [2021-05-02 20:11:28,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:11:28,389 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:11:28,400 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/divbin_unwindbound20.i[958,971] [2021-05-02 20:11:28,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:11:28,428 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:11:28,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28 WrapperNode [2021-05-02 20:11:28,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:11:28,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:11:28,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:11:28,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:11:28,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28" (1/1) ... [2021-05-02 20:11:28,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28" (1/1) ... [2021-05-02 20:11:28,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28" (1/1) ... [2021-05-02 20:11:28,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28" (1/1) ... [2021-05-02 20:11:28,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28" (1/1) ... [2021-05-02 20:11:28,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28" (1/1) ... [2021-05-02 20:11:28,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28" (1/1) ... [2021-05-02 20:11:28,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:11:28,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:11:28,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:11:28,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:11:28,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28" (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 20:11:28,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:11:28,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:11:28,517 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:11:28,517 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:11:28,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:11:28,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:11:28,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:11:28,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:11:28,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:11:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:11:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:11:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:11:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:11:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:11:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:11:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:11:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:11:28,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:11:28,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:11:28,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:11:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:11:28,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:11:28,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:11:28,739 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:11:28,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:11:28 BoogieIcfgContainer [2021-05-02 20:11:28,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:11:28,757 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:11:28,757 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:11:28,757 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:11:28,759 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:11:28" (1/1) ... [2021-05-02 20:11:28,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:11:28 BasicIcfg [2021-05-02 20:11:28,781 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:11:28,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:11:28,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:11:28,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:11:28,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:11:28" (1/4) ... [2021-05-02 20:11:28,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4095b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:11:28, skipping insertion in model container [2021-05-02 20:11:28,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:11:28" (2/4) ... [2021-05-02 20:11:28,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4095b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:11:28, skipping insertion in model container [2021-05-02 20:11:28,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:11:28" (3/4) ... [2021-05-02 20:11:28,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4095b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:11:28, skipping insertion in model container [2021-05-02 20:11:28,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:11:28" (4/4) ... [2021-05-02 20:11:28,786 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.iJordan [2021-05-02 20:11:28,789 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:11:28,791 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:11:28,807 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:11:28,829 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:11:28,829 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:11:28,829 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:11:28,829 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:11:28,829 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:11:28,829 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:11:28,829 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:11:28,829 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:11:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 20:11:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:11:28,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:28,846 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:28,846 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:28,849 INFO L82 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2021-05-02 20:11:28,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:28,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883892884] [2021-05-02 20:11:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:29,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:11:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:29,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:11:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:29,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:11:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:29,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:29,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883892884] [2021-05-02 20:11:29,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883892884] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:11:29,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:11:29,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:11:29,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136294239] [2021-05-02 20:11:29,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:11:29,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:29,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:11:29,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:11:29,069 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:29,133 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 20:11:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:11:29,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:11:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:29,139 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:11:29,139 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 20:11:29,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:11:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 20:11:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 20:11:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 20:11:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-02 20:11:29,160 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-02 20:11:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:29,160 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-02 20:11:29,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-02 20:11:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 20:11:29,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:29,161 INFO L523 BasicCegarLoop]: trace histogram [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 20:11:29,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:11:29,161 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2021-05-02 20:11:29,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:29,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4897302] [2021-05-02 20:11:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:29,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:29,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282650988] [2021-05-02 20:11:29,172 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 20:11:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:29,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:11:29,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:29,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:29,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:29,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4897302] [2021-05-02 20:11:29,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:29,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282650988] [2021-05-02 20:11:29,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282650988] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:11:29,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:11:29,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:11:29,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16733029] [2021-05-02 20:11:29,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:11:29,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:29,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:11:29,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:11:29,408 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:29,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:29,423 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-02 20:11:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:11:29,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-05-02 20:11:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:29,427 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:11:29,427 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 20:11:29,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:11:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 20:11:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 20:11:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 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 20:11:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-02 20:11:29,431 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-02 20:11:29,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:29,431 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-02 20:11:29,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-02 20:11:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 20:11:29,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:29,432 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:29,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:11:29,633 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:29,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2021-05-02 20:11:29,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:29,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221805045] [2021-05-02 20:11:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:29,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:29,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606523719] [2021-05-02 20:11:29,653 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 20:11:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:29,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:11:29,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:29,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:29,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:29,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221805045] [2021-05-02 20:11:29,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:29,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606523719] [2021-05-02 20:11:29,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606523719] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:11:29,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:11:29,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:11:29,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046282183] [2021-05-02 20:11:29,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:11:29,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:11:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:11:29,835 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:29,855 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-02 20:11:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:11:29,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 20:11:29,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:29,857 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:11:29,857 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:11:29,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:11:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:11:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 20:11:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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 20:11:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-02 20:11:29,860 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-02 20:11:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:29,860 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-02 20:11:29,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-02 20:11:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 20:11:29,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:29,861 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:30,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:30,077 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:30,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2021-05-02 20:11:30,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:30,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286307016] [2021-05-02 20:11:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:30,087 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:30,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027667616] [2021-05-02 20:11:30,087 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 20:11:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:11:30,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:30,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:11:30,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286307016] [2021-05-02 20:11:30,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027667616] [2021-05-02 20:11:30,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027667616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:30,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:30,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:11:30,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803730170] [2021-05-02 20:11:30,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:11:30,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:30,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:11:30,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:11:30,305 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:30,415 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-05-02 20:11:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:11:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 20:11:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:30,416 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:11:30,416 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:11:30,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:11:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:11:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 20:11:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:11:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-05-02 20:11:30,421 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2021-05-02 20:11:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:30,421 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-05-02 20:11:30,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-05-02 20:11:30,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:11:30,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:30,422 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 20:11:30,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:30,638 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2021-05-02 20:11:30,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:30,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549327081] [2021-05-02 20:11:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:30,648 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:30,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670735043] [2021-05-02 20:11:30,648 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 20:11:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:30,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:11:30,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:30,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:30,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:30,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549327081] [2021-05-02 20:11:30,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:30,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670735043] [2021-05-02 20:11:30,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670735043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:30,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:30,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:11:30,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94415982] [2021-05-02 20:11:30,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:11:30,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:30,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:11:30,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:11:30,789 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:30,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:30,812 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 20:11:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:11:30,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 20:11:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:30,813 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:11:30,813 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:11:30,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:11:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:11:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 20:11:30,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:11:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:11:30,817 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2021-05-02 20:11:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:30,817 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:11:30,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:11:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:11:30,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:30,818 INFO L523 BasicCegarLoop]: trace histogram [2, 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 20:11:31,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:31,036 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:31,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:31,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2021-05-02 20:11:31,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:31,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035357420] [2021-05-02 20:11:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:31,045 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:31,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481435445] [2021-05-02 20:11:31,046 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 20:11:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:31,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:11:31,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:31,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:31,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:31,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035357420] [2021-05-02 20:11:31,157 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:31,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481435445] [2021-05-02 20:11:31,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481435445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:31,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:31,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:11:31,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948391353] [2021-05-02 20:11:31,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:11:31,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:31,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:11:31,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:11:31,159 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:31,188 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 20:11:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:11:31,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:11:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:31,189 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:11:31,190 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:11:31,190 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:11:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:11:31,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-02 20:11:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:11:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 20:11:31,193 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 29 [2021-05-02 20:11:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:31,194 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 20:11:31,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:11:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 20:11:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:11:31,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:31,194 INFO L523 BasicCegarLoop]: trace histogram [2, 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 20:11:31,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:11:31,410 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:31,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2021-05-02 20:11:31,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:31,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482539123] [2021-05-02 20:11:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:31,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:31,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686528404] [2021-05-02 20:11:31,420 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 20:11:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:31,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:11:31,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:31,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:31,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:31,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482539123] [2021-05-02 20:11:31,639 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:31,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686528404] [2021-05-02 20:11:31,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686528404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:31,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:31,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:11:31,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700675095] [2021-05-02 20:11:31,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:11:31,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:31,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:11:31,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:11:31,640 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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 20:11:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:31,786 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-05-02 20:11:31,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:11:31,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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 20:11:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:31,787 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:11:31,787 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:11:31,787 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:11:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:11:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-05-02 20:11:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:11:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-02 20:11:31,791 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 29 [2021-05-02 20:11:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:31,791 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-02 20:11:31,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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 20:11:31,791 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-02 20:11:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:11:31,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:31,792 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:32,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:32,004 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:32,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:32,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1552566600, now seen corresponding path program 1 times [2021-05-02 20:11:32,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:32,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661297590] [2021-05-02 20:11:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:32,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:32,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343741023] [2021-05-02 20:11:32,011 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 20:11:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:32,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 20:11:32,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:32,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:32,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661297590] [2021-05-02 20:11:32,114 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:32,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343741023] [2021-05-02 20:11:32,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343741023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:11:32,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:11:32,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:11:32,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388559465] [2021-05-02 20:11:32,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:11:32,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:32,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:11:32,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:11:32,115 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:11:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:32,125 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-05-02 20:11:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:11:32,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-02 20:11:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:32,126 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:11:32,126 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:11:32,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:11:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:11:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 20:11:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:11:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-05-02 20:11:32,128 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2021-05-02 20:11:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:32,129 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-05-02 20:11:32,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:11:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-05-02 20:11:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:11:32,129 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:32,129 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:32,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:32,345 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 402759474, now seen corresponding path program 1 times [2021-05-02 20:11:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:32,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541274450] [2021-05-02 20:11:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:32,352 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:32,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336638315] [2021-05-02 20:11:32,353 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 20:11:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:32,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:11:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:32,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:32,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:32,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541274450] [2021-05-02 20:11:32,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:32,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336638315] [2021-05-02 20:11:32,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336638315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:32,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:32,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:11:32,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730084253] [2021-05-02 20:11:32,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:11:32,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:32,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:11:32,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:11:32,491 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:11:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:32,530 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-05-02 20:11:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:11:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-02 20:11:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:32,531 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:11:32,531 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:11:32,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:11:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:11:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 20:11:32,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:11:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-05-02 20:11:32,534 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 38 [2021-05-02 20:11:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:32,534 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-05-02 20:11:32,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:11:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-05-02 20:11:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:11:32,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:32,535 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:32,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:11:32,750 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:32,750 INFO L82 PathProgramCache]: Analyzing trace with hash 403891532, now seen corresponding path program 1 times [2021-05-02 20:11:32,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:32,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086216052] [2021-05-02 20:11:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:32,757 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:32,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095041809] [2021-05-02 20:11:32,757 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 20:11:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:32,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:11:32,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:33,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:33,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:33,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:33,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:33,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:33,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:33,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:33,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:33,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:33,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:34,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:34,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086216052] [2021-05-02 20:11:34,002 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:34,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095041809] [2021-05-02 20:11:34,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095041809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:34,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:34,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:11:34,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346980593] [2021-05-02 20:11:34,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:11:34,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:11:34,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:11:34,003 INFO L87 Difference]: Start difference. First operand 54 states and 63 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), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:11:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:34,438 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2021-05-02 20:11:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:11:34,439 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), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-02 20:11:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:34,439 INFO L225 Difference]: With dead ends: 77 [2021-05-02 20:11:34,439 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 20:11:34,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 457.9ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:11:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 20:11:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-05-02 20:11:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 48 states have internal predecessors, (55), 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 20:11:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-05-02 20:11:34,443 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 38 [2021-05-02 20:11:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:34,443 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-05-02 20:11:34,443 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), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:11:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-05-02 20:11:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 20:11:34,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:34,444 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:34,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:34,647 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:34,648 INFO L82 PathProgramCache]: Analyzing trace with hash -711541075, now seen corresponding path program 1 times [2021-05-02 20:11:34,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:34,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362793405] [2021-05-02 20:11:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:34,669 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:34,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723243082] [2021-05-02 20:11:34,669 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 20:11:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:34,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:11:34,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:34,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:11:34,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:34,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362793405] [2021-05-02 20:11:34,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:34,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723243082] [2021-05-02 20:11:34,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723243082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:34,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:34,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:11:34,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390462138] [2021-05-02 20:11:34,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:11:34,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:34,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:11:34,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:11:34,859 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:11:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:34,886 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-05-02 20:11:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:11:34,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2021-05-02 20:11:34,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:34,888 INFO L225 Difference]: With dead ends: 65 [2021-05-02 20:11:34,888 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:11:34,888 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:11:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:11:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 20:11:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 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 20:11:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-05-02 20:11:34,891 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 40 [2021-05-02 20:11:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:34,891 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-05-02 20:11:34,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:11:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-05-02 20:11:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:11:34,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:34,892 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:35,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:35,097 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash 915639449, now seen corresponding path program 2 times [2021-05-02 20:11:35,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:35,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573045953] [2021-05-02 20:11:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:35,104 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:35,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095627174] [2021-05-02 20:11:35,104 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 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 20:11:35,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:11:35,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:11:35,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:11:35,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:35,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:11:35,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:35,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573045953] [2021-05-02 20:11:35,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:35,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095627174] [2021-05-02 20:11:35,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095627174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:35,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:35,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:11:35,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967068414] [2021-05-02 20:11:35,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:11:35,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:35,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:11:35,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:11:35,216 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:11:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:35,253 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2021-05-02 20:11:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:11:35,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-05-02 20:11:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:35,254 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:11:35,254 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 20:11:35,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:11:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 20:11:35,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2021-05-02 20:11:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 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 20:11:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-02 20:11:35,257 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 43 [2021-05-02 20:11:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:35,257 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-02 20:11:35,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:11:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-02 20:11:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:11:35,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:35,258 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:35,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:11:35,475 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1272338613, now seen corresponding path program 1 times [2021-05-02 20:11:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:35,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077787297] [2021-05-02 20:11:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:35,492 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:35,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588510927] [2021-05-02 20:11:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:11:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:11:35,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:35,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:35,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:35,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077787297] [2021-05-02 20:11:35,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:35,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588510927] [2021-05-02 20:11:35,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588510927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:35,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:35,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:11:35,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141500696] [2021-05-02 20:11:35,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:11:35,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:35,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:11:35,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:11:35,712 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:11:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:35,758 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2021-05-02 20:11:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:11:35,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-05-02 20:11:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:35,759 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:11:35,759 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:11:35,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:11:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:11:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-05-02 20:11:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 69 states have internal predecessors, (79), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:11:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-05-02 20:11:35,769 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 47 [2021-05-02 20:11:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:35,769 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-05-02 20:11:35,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:11:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-05-02 20:11:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:11:35,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:35,770 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:35,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:11:35,988 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:35,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:35,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1271206555, now seen corresponding path program 1 times [2021-05-02 20:11:35,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:35,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762534036] [2021-05-02 20:11:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:36,005 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:36,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509243966] [2021-05-02 20:11:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:11:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:11:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:11:36,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:36,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:36,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:36,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:36,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:36,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:36,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:36,780 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2021-05-02 20:11:36,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:36,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:37,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:11:37,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:37,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762534036] [2021-05-02 20:11:37,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:37,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509243966] [2021-05-02 20:11:37,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509243966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:37,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:37,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:11:37,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346393316] [2021-05-02 20:11:37,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:11:37,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:37,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:11:37,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:11:37,285 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:11:37,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:37,604 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-05-02 20:11:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:11:37,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-05-02 20:11:37,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:37,605 INFO L225 Difference]: With dead ends: 85 [2021-05-02 20:11:37,605 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:11:37,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:11:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:11:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:11:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 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 20:11:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:11:37,612 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 47 [2021-05-02 20:11:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:37,612 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:11:37,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:11:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:11:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:11:37,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:37,613 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:37,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:11:37,816 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:37,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1045240019, now seen corresponding path program 3 times [2021-05-02 20:11:37,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:37,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471078545] [2021-05-02 20:11:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:37,833 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:37,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746379430] [2021-05-02 20:11:37,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:37,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:11:37,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:11:37,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:11:37,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:37,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:37,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:37,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:37,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:11:38,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:38,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471078545] [2021-05-02 20:11:38,031 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:38,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746379430] [2021-05-02 20:11:38,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746379430] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:11:38,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:11:38,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:11:38,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934292207] [2021-05-02 20:11:38,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:11:38,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:38,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:11:38,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:11:38,032 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:11:38,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:38,047 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-05-02 20:11:38,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:11:38,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-05-02 20:11:38,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:38,048 INFO L225 Difference]: With dead ends: 65 [2021-05-02 20:11:38,048 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 20:11:38,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:11:38,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 20:11:38,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2021-05-02 20:11:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:11:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-05-02 20:11:38,050 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 46 [2021-05-02 20:11:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:38,050 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-05-02 20:11:38,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:11:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-05-02 20:11:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:11:38,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:38,050 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:38,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:38,251 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1808689185, now seen corresponding path program 2 times [2021-05-02 20:11:38,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:38,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283946211] [2021-05-02 20:11:38,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:38,256 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:38,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598526695] [2021-05-02 20:11:38,256 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:38,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:11:38,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:11:38,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:11:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:11:38,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:11:38,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283946211] [2021-05-02 20:11:38,432 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:11:38,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598526695] [2021-05-02 20:11:38,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598526695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:11:38,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:11:38,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:11:38,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602824670] [2021-05-02 20:11:38,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:11:38,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:11:38,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:11:38,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:11:38,433 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:11:38,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:11:38,492 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2021-05-02 20:11:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:11:38,493 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-05-02 20:11:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:11:38,493 INFO L225 Difference]: With dead ends: 94 [2021-05-02 20:11:38,493 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 20:11:38,494 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:11:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 20:11:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-05-02 20:11:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:11:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-05-02 20:11:38,496 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 50 [2021-05-02 20:11:38,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:11:38,496 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-05-02 20:11:38,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:11:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-05-02 20:11:38,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:11:38,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:11:38,496 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:11:38,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:11:38,720 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:11:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:11:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1807557127, now seen corresponding path program 2 times [2021-05-02 20:11:38,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:11:38,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898253587] [2021-05-02 20:11:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:11:38,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:11:38,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551766415] [2021-05-02 20:11:38,726 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:11:39,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:11:39,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:11:39,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:11:39,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:11:39,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:39,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:40,051 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-02 20:11:40,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:40,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:40,389 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-02 20:11:40,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:40,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:41,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:41,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:41,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:41,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:11:41,928 WARN L159 QuantifierPusher]: Ignoring assumption.