/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/hard-u_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:58:37,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:58:37,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:58:38,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:58:38,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:58:38,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:58:38,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:58:38,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:58:38,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:58:38,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:58:38,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:58:38,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:58:38,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:58:38,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:58:38,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:58:38,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:58:38,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:58:38,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:58:38,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:58:38,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:58:38,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:58:38,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:58:38,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:58:38,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:58:38,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:58:38,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:58:38,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:58:38,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:58:38,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:58:38,070 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:58:38,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:58:38,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:58:38,072 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:58:38,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:58:38,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:58:38,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:58:38,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:58:38,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:58:38,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:58:38,074 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:58:38,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:58:38,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:58:38,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:58:38,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:58:38,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:58:38,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:58:38,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:58:38,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:58:38,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:58:38,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:58:38,076 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:58:38,076 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:58:38,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:58:38,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:58:38,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:58:38,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:58:38,363 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:58:38,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c [2021-05-06 08:58:38,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62a7f338/bfce19eed31a408fa0232bbbce6dcb48/FLAG2e56c1b68 [2021-05-06 08:58:38,787 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:58:38,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c [2021-05-06 08:58:38,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62a7f338/bfce19eed31a408fa0232bbbce6dcb48/FLAG2e56c1b68 [2021-05-06 08:58:38,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f62a7f338/bfce19eed31a408fa0232bbbce6dcb48 [2021-05-06 08:58:38,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:58:38,810 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:58:38,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:58:38,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:58:38,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:58:38,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:58:38" (1/1) ... [2021-05-06 08:58:38,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363d08ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:38, skipping insertion in model container [2021-05-06 08:58:38,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:58:38" (1/1) ... [2021-05-06 08:58:38,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:58:38,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:58:38,947 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/hard-u_unwindbound20.c[545,558] [2021-05-06 08:58:38,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:58:38,972 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:58:38,984 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/hard-u_unwindbound20.c[545,558] [2021-05-06 08:58:38,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:58:39,033 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:58:39,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:39 WrapperNode [2021-05-06 08:58:39,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:58:39,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:58:39,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:58:39,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:58:39,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:39" (1/1) ... [2021-05-06 08:58:39,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:39" (1/1) ... [2021-05-06 08:58:39,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:39" (1/1) ... [2021-05-06 08:58:39,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:39" (1/1) ... [2021-05-06 08:58:39,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:39" (1/1) ... [2021-05-06 08:58:39,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:39" (1/1) ... [2021-05-06 08:58:39,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:39" (1/1) ... [2021-05-06 08:58:39,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:58:39,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:58:39,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:58:39,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:58:39,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:39" (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 08:58:39,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:58:39,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:58:39,104 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:58:39,104 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:58:39,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:58:39,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:58:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:58:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:58:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:58:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:58:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:58:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:58:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:58:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:58:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:58:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:58:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:58:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:58:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:58:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:58:39,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:58:39,320 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:58:39,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:58:39 BoogieIcfgContainer [2021-05-06 08:58:39,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:58:39,321 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:58:39,321 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:58:39,322 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:58:39,323 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:58:39" (1/1) ... [2021-05-06 08:58:39,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:58:39 BasicIcfg [2021-05-06 08:58:39,350 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:58:39,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:58:39,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:58:39,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:58:39,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:58:38" (1/4) ... [2021-05-06 08:58:39,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413bc2c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:58:39, skipping insertion in model container [2021-05-06 08:58:39,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:39" (2/4) ... [2021-05-06 08:58:39,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413bc2c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:58:39, skipping insertion in model container [2021-05-06 08:58:39,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:58:39" (3/4) ... [2021-05-06 08:58:39,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413bc2c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:58:39, skipping insertion in model container [2021-05-06 08:58:39,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:58:39" (4/4) ... [2021-05-06 08:58:39,355 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.cJordan [2021-05-06 08:58:39,365 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:58:39,368 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:58:39,379 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:58:39,398 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:58:39,398 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:58:39,398 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:58:39,398 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:58:39,398 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:58:39,399 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:58:39,399 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:58:39,399 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:58:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:58:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:58:39,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:39,419 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 08:58:39,419 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:39,425 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-06 08:58:39,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:39,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135132276] [2021-05-06 08:58:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:39,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:58:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:39,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:58:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:39,656 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 08:58:39,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:39,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135132276] [2021-05-06 08:58:39,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135132276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:39,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:39,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:58:39,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307682066] [2021-05-06 08:58:39,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:58:39,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:58:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:58:39,672 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 08:58:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:39,791 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:58:39,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:58:39,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 18 [2021-05-06 08:58:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:39,798 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:58:39,798 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:58:39,799 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:58:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:58:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 08:58:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:58:39,827 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 08:58:39,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:39,827 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:58:39,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 08:58:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:58:39,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:58:39,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:39,828 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 08:58:39,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:58:39,829 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:39,830 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-06 08:58:39,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:39,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824694770] [2021-05-06 08:58:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:39,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:58:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:39,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:58:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:39,949 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 08:58:39,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:39,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824694770] [2021-05-06 08:58:39,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824694770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:39,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:39,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:58:39,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115936889] [2021-05-06 08:58:39,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:39,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:39,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:39,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:39,951 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 08:58:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:40,185 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-06 08:58:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:58:40,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 08:58:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:40,188 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:58:40,188 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:58:40,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:58:40,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:58:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 08:58:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 08:58:40,203 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 08:58:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:40,204 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 08:58:40,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 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 08:58:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 08:58:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:58:40,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:40,206 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:40,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:58:40,208 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:40,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-06 08:58:40,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:40,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750042576] [2021-05-06 08:58:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:40,229 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:40,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656431962] [2021-05-06 08:58:40,230 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 08:58:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:40,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:58:40,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:40,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:40,404 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 08:58:40,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:40,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750042576] [2021-05-06 08:58:40,405 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:40,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656431962] [2021-05-06 08:58:40,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656431962] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:40,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:40,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:58:40,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330676169] [2021-05-06 08:58:40,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:58:40,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:40,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:58:40,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:58:40,406 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (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 08:58:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:40,414 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-06 08:58:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:58:40,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (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 20 [2021-05-06 08:58:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:40,415 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:58:40,415 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:58:40,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:58:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:58:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:58:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 08:58:40,418 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 08:58:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:40,418 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 08:58:40,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (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 08:58:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 08:58:40,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:58:40,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:40,419 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] [2021-05-06 08:58:40,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:58:40,627 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-06 08:58:40,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:40,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546703889] [2021-05-06 08:58:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:40,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:58:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:40,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:58:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:40,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 08:58:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:58:40,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:40,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546703889] [2021-05-06 08:58:40,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546703889] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:40,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:40,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:58:40,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354856476] [2021-05-06 08:58:40,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:40,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:40,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:40,728 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:58:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:40,945 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-06 08:58:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:58:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:58:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:40,947 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:58:40,948 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:58:40,948 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:58:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:58:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 08:58:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:40,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 08:58:40,957 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 08:58:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:40,957 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 08:58:40,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:58:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 08:58:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:58:40,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:40,959 INFO L523 BasicCegarLoop]: trace histogram [3, 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 08:58:40,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 08:58:40,959 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:40,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:40,960 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-06 08:58:40,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:40,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855693011] [2021-05-06 08:58:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:40,985 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:40,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293290299] [2021-05-06 08:58:40,986 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 08:58:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:58:41,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:41,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:58:41,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:41,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855693011] [2021-05-06 08:58:41,135 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:41,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293290299] [2021-05-06 08:58:41,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293290299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:41,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:41,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:58:41,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030195331] [2021-05-06 08:58:41,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:58:41,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:41,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:58:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:41,138 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:58:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:43,379 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2021-05-06 08:58:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:58:43,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:58:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:43,380 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:58:43,380 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:58:43,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:58:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:58:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:58:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-05-06 08:58:43,384 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2021-05-06 08:58:43,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:43,384 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-05-06 08:58:43,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:58:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-05-06 08:58:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:58:43,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:43,385 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:43,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:43,593 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-06 08:58:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:43,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170600337] [2021-05-06 08:58:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:43,600 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:43,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107145199] [2021-05-06 08:58:43,600 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 08:58:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:43,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:58:43,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:43,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:43,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:43,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:43,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:43,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:43,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:43,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:43,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:58:43,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:43,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170600337] [2021-05-06 08:58:43,762 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:43,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107145199] [2021-05-06 08:58:43,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107145199] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:43,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:43,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:58:43,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579753948] [2021-05-06 08:58:43,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:58:43,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:58:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:43,764 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:43,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:43,798 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-05-06 08:58:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:58:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 08:58:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:43,801 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:58:43,801 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:58:43,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:58:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 08:58:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:58:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-06 08:58:43,817 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2021-05-06 08:58:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:43,818 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-06 08:58:43,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-06 08:58:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:58:43,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:43,825 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:44,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:44,042 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:44,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:44,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-06 08:58:44,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:44,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433424182] [2021-05-06 08:58:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:44,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:44,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659493745] [2021-05-06 08:58:44,050 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 08:58:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:44,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:58:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:44,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:58:44,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:44,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433424182] [2021-05-06 08:58:44,249 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:44,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659493745] [2021-05-06 08:58:44,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659493745] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:44,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:44,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:58:44,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79551580] [2021-05-06 08:58:44,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:44,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:44,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:44,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:44,251 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:58:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:44,405 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2021-05-06 08:58:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:58:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:58:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:44,406 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:58:44,406 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 08:58:44,407 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:58:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 08:58:44,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-06 08:58:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:58:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2021-05-06 08:58:44,410 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2021-05-06 08:58:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:44,411 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2021-05-06 08:58:44,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:58:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2021-05-06 08:58:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:58:44,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:44,411 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:44,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:44,621 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-06 08:58:44,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:44,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94380426] [2021-05-06 08:58:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:44,629 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:44,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99122492] [2021-05-06 08:58:44,629 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 08:58:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:44,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:58:44,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:44,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:58:44,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:44,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94380426] [2021-05-06 08:58:44,760 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:44,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99122492] [2021-05-06 08:58:44,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99122492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:58:44,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:58:44,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:58:44,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040269415] [2021-05-06 08:58:44,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:58:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:58:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:44,762 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:44,803 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-05-06 08:58:44,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:58:44,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 08:58:44,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:44,805 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:58:44,805 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 08:58:44,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 08:58:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 08:58:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:58:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-05-06 08:58:44,809 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 38 [2021-05-06 08:58:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:44,809 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-05-06 08:58:44,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-05-06 08:58:44,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:58:44,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:44,809 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:45,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:45,025 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:45,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-06 08:58:45,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:45,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179236181] [2021-05-06 08:58:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:45,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:45,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482173932] [2021-05-06 08:58:45,031 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 08:58:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:45,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:58:45,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:45,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:58:45,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:45,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179236181] [2021-05-06 08:58:45,245 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:45,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482173932] [2021-05-06 08:58:45,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482173932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:58:45,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:58:45,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:58:45,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459167159] [2021-05-06 08:58:45,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:45,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:45,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:45,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:45,246 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:58:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:47,526 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2021-05-06 08:58:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:58:47,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:58:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:47,527 INFO L225 Difference]: With dead ends: 95 [2021-05-06 08:58:47,527 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 08:58:47,528 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:58:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 08:58:47,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-05-06 08:58:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:58:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2021-05-06 08:58:47,532 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 46 [2021-05-06 08:58:47,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:47,532 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2021-05-06 08:58:47,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:58:47,532 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2021-05-06 08:58:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:58:47,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:47,533 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:47,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:47,740 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:47,740 INFO L82 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2021-05-06 08:58:47,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:47,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322112655] [2021-05-06 08:58:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:47,746 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:47,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88081037] [2021-05-06 08:58:47,746 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 08:58:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:58:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:47,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:58:47,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:47,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322112655] [2021-05-06 08:58:47,895 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:47,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88081037] [2021-05-06 08:58:47,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88081037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:58:47,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:58:47,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:58:47,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511861324] [2021-05-06 08:58:47,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:47,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:47,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:47,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:47,897 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:58:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:47,994 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2021-05-06 08:58:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:58:47,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-06 08:58:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:47,995 INFO L225 Difference]: With dead ends: 115 [2021-05-06 08:58:47,996 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 08:58:47,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:58:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 08:58:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-06 08:58:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.16) internal successors, (87), 77 states have internal predecessors, (87), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:58:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-05-06 08:58:47,999 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 50 [2021-05-06 08:58:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:47,999 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-05-06 08:58:48,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:58:48,000 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-05-06 08:58:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:58:48,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:48,000 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:48,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:58:48,209 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:48,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:48,209 INFO L82 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2021-05-06 08:58:48,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:48,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343063199] [2021-05-06 08:58:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:48,215 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:48,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975460806] [2021-05-06 08:58:48,215 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