/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:55:11,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:55:11,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:55:11,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:55:11,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:55:11,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:55:11,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:55:11,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:55:11,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:55:11,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:55:11,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:55:11,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:55:11,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:55:11,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:55:11,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:55:11,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:55:11,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:55:11,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:55:11,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:55:11,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:55:11,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:55:11,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:55:11,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:55:11,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:55:11,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:55:11,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:55:11,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:55:11,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:55:11,134 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:55:11,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:55:11,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:55:11,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:55:11,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:55:11,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:55:11,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:55:11,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:55:11,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:55:11,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:55:11,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:55:11,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:55:11,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:55:11,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:55:11,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:55:11,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:55:11,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:55:11,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:55:11,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:55:11,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:55:11,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:55:11,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:55:11,153 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:55:11,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:55:11,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:55:11,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:55:11,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:55:11,476 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:55:11,477 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:55:11,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c [2021-05-06 09:55:11,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5a137a0/99d641f3ad71419cb2e17256d847fc02/FLAGb6ca61f77 [2021-05-06 09:55:11,849 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:55:11,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c [2021-05-06 09:55:11,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5a137a0/99d641f3ad71419cb2e17256d847fc02/FLAGb6ca61f77 [2021-05-06 09:55:11,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5a137a0/99d641f3ad71419cb2e17256d847fc02 [2021-05-06 09:55:11,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:55:11,864 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:55:11,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:55:11,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:55:11,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:55:11,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:55:11" (1/1) ... [2021-05-06 09:55:11,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7480cefe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:11, skipping insertion in model container [2021-05-06 09:55:11,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:55:11" (1/1) ... [2021-05-06 09:55:11,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:55:11,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:55:11,977 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c[524,537] [2021-05-06 09:55:12,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:55:12,009 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:55:12,052 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c[524,537] [2021-05-06 09:55:12,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:55:12,074 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:55:12,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:12 WrapperNode [2021-05-06 09:55:12,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:55:12,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:55:12,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:55:12,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:55:12,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:12" (1/1) ... [2021-05-06 09:55:12,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:12" (1/1) ... [2021-05-06 09:55:12,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:12" (1/1) ... [2021-05-06 09:55:12,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:12" (1/1) ... [2021-05-06 09:55:12,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:12" (1/1) ... [2021-05-06 09:55:12,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:12" (1/1) ... [2021-05-06 09:55:12,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:12" (1/1) ... [2021-05-06 09:55:12,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:55:12,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:55:12,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:55:12,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:55:12,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:12" (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 [2021-05-06 09:55:12,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:55:12,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:55:12,204 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:55:12,205 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:55:12,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:55:12,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:55:12,205 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:55:12,205 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:55:12,205 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:55:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:55:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:55:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:55:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:55:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:55:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:55:12,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:55:12,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:55:12,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:55:12,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:55:12,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:55:12,412 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:55:12,412 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 09:55:12,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:55:12 BoogieIcfgContainer [2021-05-06 09:55:12,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:55:12,414 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:55:12,414 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:55:12,414 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:55:12,416 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:55:12" (1/1) ... [2021-05-06 09:55:12,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:55:12 BasicIcfg [2021-05-06 09:55:12,431 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:55:12,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:55:12,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:55:12,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:55:12,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:55:11" (1/4) ... [2021-05-06 09:55:12,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7288db5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:55:12, skipping insertion in model container [2021-05-06 09:55:12,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:55:12" (2/4) ... [2021-05-06 09:55:12,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7288db5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:55:12, skipping insertion in model container [2021-05-06 09:55:12,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:55:12" (3/4) ... [2021-05-06 09:55:12,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7288db5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:55:12, skipping insertion in model container [2021-05-06 09:55:12,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:55:12" (4/4) ... [2021-05-06 09:55:12,436 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound50.cJordan [2021-05-06 09:55:12,439 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:55:12,442 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:55:12,470 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:55:12,482 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:55:12,482 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:55:12,482 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:55:12,482 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:55:12,482 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:55:12,482 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:55:12,482 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:55:12,482 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:55:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:55:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:55:12,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:12,498 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:55:12,498 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:12,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2021-05-06 09:55:12,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:12,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218131053] [2021-05-06 09:55:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:12,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:55:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:12,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:55:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:55:12,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:12,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218131053] [2021-05-06 09:55:12,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218131053] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:55:12,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:55:12,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:55:12,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652890986] [2021-05-06 09:55:12,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:55:12,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:12,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:55:12,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:55:12,667 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:55:12,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:55:12,745 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-05-06 09:55:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:55:12,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:55:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:55:12,751 INFO L225 Difference]: With dead ends: 33 [2021-05-06 09:55:12,751 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 09:55:12,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:55:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 09:55:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-06 09:55:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:55:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-06 09:55:12,778 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-06 09:55:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:55:12,778 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-06 09:55:12,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:55:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-06 09:55:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:55:12,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:12,779 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:55:12,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:55:12,780 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:12,781 INFO L82 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2021-05-06 09:55:12,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:12,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713943904] [2021-05-06 09:55:12,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:12,808 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:55:12,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763583541] [2021-05-06 09:55:12,808 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 [2021-05-06 09:55:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:12,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 09:55:12,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:55:12,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:12,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:12,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:12,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:12,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:55:12,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:12,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713943904] [2021-05-06 09:55:12,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:55:12,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763583541] [2021-05-06 09:55:12,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763583541] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:55:12,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:55:12,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:55:12,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673032154] [2021-05-06 09:55:12,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:55:12,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:12,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:55:12,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:55:12,993 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:55:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:55:13,003 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-05-06 09:55:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:55:13,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 09:55:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:55:13,005 INFO L225 Difference]: With dead ends: 29 [2021-05-06 09:55:13,005 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 09:55:13,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:55:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 09:55:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 09:55:13,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 09:55:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 09:55:13,015 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-06 09:55:13,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:55:13,015 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 09:55:13,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:55:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 09:55:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 09:55:13,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:13,021 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:55:13,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 09:55:13,233 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:13,233 INFO L82 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2021-05-06 09:55:13,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:13,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56508961] [2021-05-06 09:55:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:13,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:55:13,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789760869] [2021-05-06 09:55:13,244 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 [2021-05-06 09:55:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:13,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:55:13,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:55:13,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:55:13,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:13,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56508961] [2021-05-06 09:55:13,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:55:13,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789760869] [2021-05-06 09:55:13,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789760869] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:55:13,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:55:13,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:55:13,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962604669] [2021-05-06 09:55:13,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:55:13,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:13,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:55:13,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:55:13,380 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:55:13,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:55:13,457 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 09:55:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:55:13,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 09:55:13,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:55:13,459 INFO L225 Difference]: With dead ends: 40 [2021-05-06 09:55:13,459 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 09:55:13,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:55:13,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 09:55:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-06 09:55:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 09:55:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 09:55:13,464 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-06 09:55:13,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:55:13,464 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 09:55:13,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:55:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 09:55:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 09:55:13,465 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:13,465 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:55:13,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:55:13,675 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:13,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2021-05-06 09:55:13,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:13,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382671495] [2021-05-06 09:55:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:13,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:55:13,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729609560] [2021-05-06 09:55:13,684 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 [2021-05-06 09:55:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:13,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 09:55:13,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:55:13,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:13,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:55:14,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:14,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382671495] [2021-05-06 09:55:14,039 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:55:14,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729609560] [2021-05-06 09:55:14,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729609560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:55:14,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:55:14,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 09:55:14,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706538424] [2021-05-06 09:55:14,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 09:55:14,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:14,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 09:55:14,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:55:14,040 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:55:14,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:55:14,300 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-05-06 09:55:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 09:55:14,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 09:55:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:55:14,302 INFO L225 Difference]: With dead ends: 49 [2021-05-06 09:55:14,302 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 09:55:14,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-06 09:55:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 09:55:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 09:55:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:55:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 09:55:14,306 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-06 09:55:14,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:55:14,306 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 09:55:14,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:55:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 09:55:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:55:14,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:14,307 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:55:14,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:55:14,521 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:14,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2021-05-06 09:55:14,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:14,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961312817] [2021-05-06 09:55:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:14,531 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:55:14,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997763324] [2021-05-06 09:55:14,532 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 [2021-05-06 09:55:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:14,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:55:14,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:55:14,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:55:14,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:14,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961312817] [2021-05-06 09:55:14,650 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:55:14,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997763324] [2021-05-06 09:55:14,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997763324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:55:14,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:55:14,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 09:55:14,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722394860] [2021-05-06 09:55:14,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:55:14,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:14,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:55:14,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:55:14,652 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 09:55:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:55:14,676 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:55:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:55:14,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-06 09:55:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:55:14,677 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:55:14,677 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:55:14,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:55:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:55:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 09:55:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 09:55:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-05-06 09:55:14,688 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 27 [2021-05-06 09:55:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:55:14,688 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-05-06 09:55:14,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 09:55:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-05-06 09:55:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:55:14,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:14,689 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:55:14,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:55:14,909 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2116787731, now seen corresponding path program 1 times [2021-05-06 09:55:14,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:14,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055898865] [2021-05-06 09:55:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:14,918 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:55:14,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343367110] [2021-05-06 09:55:14,918 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 [2021-05-06 09:55:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:14,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:55:14,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:55:15,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:55:15,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:15,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055898865] [2021-05-06 09:55:15,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:55:15,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343367110] [2021-05-06 09:55:15,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343367110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:55:15,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:55:15,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:55:15,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862622613] [2021-05-06 09:55:15,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:55:15,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:15,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:55:15,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:55:15,210 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-05-06 09:55:15,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:55:15,329 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-05-06 09:55:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:55:15,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 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 27 [2021-05-06 09:55:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:55:15,333 INFO L225 Difference]: With dead ends: 61 [2021-05-06 09:55:15,333 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 09:55:15,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:55:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 09:55:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 09:55:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:55:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 09:55:15,337 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-05-06 09:55:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:55:15,337 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 09:55:15,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-05-06 09:55:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 09:55:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:55:15,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:15,338 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] [2021-05-06 09:55:15,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:55:15,552 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1857795251, now seen corresponding path program 1 times [2021-05-06 09:55:15,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:15,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97317710] [2021-05-06 09:55:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:15,560 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:55:15,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870357874] [2021-05-06 09:55:15,560 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 [2021-05-06 09:55:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:15,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 09:55:15,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:55:15,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:55:15,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:15,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97317710] [2021-05-06 09:55:15,779 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:55:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870357874] [2021-05-06 09:55:15,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870357874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:55:15,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:55:15,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 09:55:15,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614735761] [2021-05-06 09:55:15,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 09:55:15,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:15,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 09:55:15,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:55:15,781 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:55:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:55:15,944 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2021-05-06 09:55:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 09:55:15,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 09:55:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:55:15,945 INFO L225 Difference]: With dead ends: 64 [2021-05-06 09:55:15,945 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 09:55:15,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 09:55:15,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 09:55:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 09:55:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:55:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-05-06 09:55:15,951 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2021-05-06 09:55:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:55:15,952 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-05-06 09:55:15,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:55:15,952 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-05-06 09:55:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 09:55:15,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:15,955 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:55:16,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:55:16,156 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2004143825, now seen corresponding path program 1 times [2021-05-06 09:55:16,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:16,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364116978] [2021-05-06 09:55:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:16,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:55:16,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462821128] [2021-05-06 09:55:16,163 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 [2021-05-06 09:55:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:16,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 09:55:16,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:55:16,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:16,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:16,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:55:16,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:16,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364116978] [2021-05-06 09:55:16,297 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:55:16,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462821128] [2021-05-06 09:55:16,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462821128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:55:16,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:55:16,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:55:16,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592974865] [2021-05-06 09:55:16,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:55:16,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:16,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:55:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:55:16,298 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:55:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:55:16,621 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2021-05-06 09:55:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:55:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 09:55:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:55:16,622 INFO L225 Difference]: With dead ends: 77 [2021-05-06 09:55:16,622 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 09:55:16,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:55:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 09:55:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-06 09:55:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:55:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-05-06 09:55:16,626 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 29 [2021-05-06 09:55:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:55:16,626 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-05-06 09:55:16,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:55:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-05-06 09:55:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 09:55:16,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:16,627 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:55:16,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:55:16,835 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:16,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1116640144, now seen corresponding path program 1 times [2021-05-06 09:55:16,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:16,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663115026] [2021-05-06 09:55:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:16,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:55:16,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690886397] [2021-05-06 09:55:16,842 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 [2021-05-06 09:55:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:16,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 09:55:16,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:55:17,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:55:17,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:17,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663115026] [2021-05-06 09:55:17,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:55:17,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690886397] [2021-05-06 09:55:17,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690886397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:55:17,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:55:17,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:55:17,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257639927] [2021-05-06 09:55:17,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:55:17,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:17,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:55:17,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:55:17,023 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-05-06 09:55:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:55:17,311 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2021-05-06 09:55:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:55:17,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 29 [2021-05-06 09:55:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:55:17,312 INFO L225 Difference]: With dead ends: 85 [2021-05-06 09:55:17,312 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 09:55:17,312 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:55:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 09:55:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-06 09:55:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:55:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-05-06 09:55:17,317 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 29 [2021-05-06 09:55:17,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:55:17,317 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-05-06 09:55:17,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-05-06 09:55:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-05-06 09:55:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:55:17,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:17,317 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:55:17,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 09:55:17,523 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:17,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1454559031, now seen corresponding path program 1 times [2021-05-06 09:55:17,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:17,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832717548] [2021-05-06 09:55:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:17,536 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:55:17,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333012028] [2021-05-06 09:55:17,536 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 [2021-05-06 09:55:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:55:17,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:55:17,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:55:17,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:17,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832717548] [2021-05-06 09:55:17,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:55:17,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333012028] [2021-05-06 09:55:17,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333012028] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:55:17,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:55:17,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 09:55:17,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505189192] [2021-05-06 09:55:17,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:55:17,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:17,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:55:17,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:55:17,674 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:55:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:55:17,735 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2021-05-06 09:55:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:55:17,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-06 09:55:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:55:17,736 INFO L225 Difference]: With dead ends: 90 [2021-05-06 09:55:17,736 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 09:55:17,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:55:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 09:55:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2021-05-06 09:55:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:55:17,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-05-06 09:55:17,740 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 33 [2021-05-06 09:55:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:55:17,740 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-05-06 09:55:17,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:55:17,740 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-05-06 09:55:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 09:55:17,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:55:17,740 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:55:17,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:55:17,949 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:55:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:55:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash 482870923, now seen corresponding path program 1 times [2021-05-06 09:55:17,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:55:17,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962539937] [2021-05-06 09:55:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:55:17,978 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:55:17,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106729128] [2021-05-06 09:55:17,978 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 [2021-05-06 09:55:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:55:18,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 09:55:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:55:18,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:18,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:18,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:18,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:18,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:55:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 09:55:18,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:55:18,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962539937] [2021-05-06 09:55:18,213 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:55:18,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106729128] [2021-05-06 09:55:18,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106729128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:55:18,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:55:18,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:55:18,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483023746] [2021-05-06 09:55:18,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:55:18,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:55:18,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:55:18,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:55:18,214 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 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)