/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/sqrt1-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:50:44,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:50:44,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:50:44,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:50:44,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:50:44,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:50:44,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:50:44,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:50:44,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:50:44,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:50:44,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:50:44,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:50:44,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:50:44,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:50:44,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:50:44,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:50:44,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:50:44,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:50:44,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:50:44,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:50:44,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:50:44,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:50:44,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:50:44,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:50:44,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:50:44,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:50:44,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:50:44,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:50:44,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:50:44,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:50:44,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:50:44,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:50:44,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:50:44,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:50:44,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:50:44,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:50:44,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:50:44,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:50:44,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:50:44,268 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:50:44,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:50:44,268 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:50:44,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:50:44,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:50:44,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:50:44,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:50:44,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:50:44,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:50:44,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:50:44,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:50:44,270 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:50:44,270 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:50:44,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:50:44,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:50:44,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:50:44,536 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:50:44,537 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:50:44,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2021-05-02 22:50:44,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01a3b2a0b/e8fa0a69d57e47f78a80e6596f15c07e/FLAG59bb87302 [2021-05-02 22:50:44,938 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:50:44,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2021-05-02 22:50:44,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01a3b2a0b/e8fa0a69d57e47f78a80e6596f15c07e/FLAG59bb87302 [2021-05-02 22:50:44,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01a3b2a0b/e8fa0a69d57e47f78a80e6596f15c07e [2021-05-02 22:50:44,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:50:44,957 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:50:44,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:50:44,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:50:44,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:50:44,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:50:44" (1/1) ... [2021-05-02 22:50:44,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20f86f69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:44, skipping insertion in model container [2021-05-02 22:50:44,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:50:44" (1/1) ... [2021-05-02 22:50:44,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:50:44,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:50:45,059 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/sqrt1-ll_unwindbound100.c[520,533] [2021-05-02 22:50:45,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:50:45,073 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:50:45,083 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/sqrt1-ll_unwindbound100.c[520,533] [2021-05-02 22:50:45,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:50:45,108 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:50:45,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:45 WrapperNode [2021-05-02 22:50:45,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:50:45,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:50:45,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:50:45,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:50:45,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:45" (1/1) ... [2021-05-02 22:50:45,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:45" (1/1) ... [2021-05-02 22:50:45,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:45" (1/1) ... [2021-05-02 22:50:45,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:45" (1/1) ... [2021-05-02 22:50:45,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:45" (1/1) ... [2021-05-02 22:50:45,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:45" (1/1) ... [2021-05-02 22:50:45,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:45" (1/1) ... [2021-05-02 22:50:45,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:50:45,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:50:45,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:50:45,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:50:45,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:50:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:50:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:50:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:50:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:50:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:50:45,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:50:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:50:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:50:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:50:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:50:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:50:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:50:45,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:50:45,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:50:45,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:50:45,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:50:45,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:50:45,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:50:45,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:50:45,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:50:45,480 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:50:45,481 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:50:45,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:50:45 BoogieIcfgContainer [2021-05-02 22:50:45,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:50:45,482 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:50:45,482 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:50:45,483 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:50:45,484 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:50:45" (1/1) ... [2021-05-02 22:50:45,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:50:45 BasicIcfg [2021-05-02 22:50:45,501 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:50:45,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:50:45,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:50:45,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:50:45,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:50:44" (1/4) ... [2021-05-02 22:50:45,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ecfb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:50:45, skipping insertion in model container [2021-05-02 22:50:45,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:50:45" (2/4) ... [2021-05-02 22:50:45,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ecfb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:50:45, skipping insertion in model container [2021-05-02 22:50:45,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:50:45" (3/4) ... [2021-05-02 22:50:45,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ecfb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:50:45, skipping insertion in model container [2021-05-02 22:50:45,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:50:45" (4/4) ... [2021-05-02 22:50:45,507 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound100.cJordan [2021-05-02 22:50:45,510 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:50:45,515 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:50:45,526 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:50:45,545 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:50:45,545 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:50:45,545 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:50:45,545 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:50:45,545 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:50:45,545 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:50:45,545 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:50:45,546 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:50:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:50:45,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:50:45,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:45,565 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:45,565 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:45,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:45,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2021-05-02 22:50:45,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:45,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637965786] [2021-05-02 22:50:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:45,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:50:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:50:45,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:45,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637965786] [2021-05-02 22:50:45,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637965786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:50:45,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:50:45,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:50:45,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295850933] [2021-05-02 22:50:45,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:50:45,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:45,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:50:45,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:50:45,803 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:50:45,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:45,900 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-02 22:50:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:50:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 22:50:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:45,907 INFO L225 Difference]: With dead ends: 27 [2021-05-02 22:50:45,907 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 22:50:45,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:50:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 22:50:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 22:50:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:50:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-02 22:50:45,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-02 22:50:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:45,938 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-02 22:50:45,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:50:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-02 22:50:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:50:45,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:45,940 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:45,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:50:45,940 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2021-05-02 22:50:45,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:45,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084349342] [2021-05-02 22:50:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:46,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:50:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:50:46,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:46,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084349342] [2021-05-02 22:50:46,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084349342] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:50:46,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:50:46,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:50:46,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982913649] [2021-05-02 22:50:46,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:50:46,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:50:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:50:46,039 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:50:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:46,160 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-05-02 22:50:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:50:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:50:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:46,161 INFO L225 Difference]: With dead ends: 23 [2021-05-02 22:50:46,162 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 22:50:46,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:50:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 22:50:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 22:50:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:50:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-02 22:50:46,169 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-02 22:50:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:46,169 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-02 22:50:46,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:50:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-02 22:50:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:50:46,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:46,171 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:46,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 22:50:46,171 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:46,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:46,172 INFO L82 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2021-05-02 22:50:46,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:46,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92068559] [2021-05-02 22:50:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:46,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:50:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:50:46,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:46,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92068559] [2021-05-02 22:50:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92068559] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:50:46,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:50:46,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 22:50:46,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043159783] [2021-05-02 22:50:46,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:50:46,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:46,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:50:46,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:50:46,273 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:50:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:46,519 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-05-02 22:50:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:50:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:50:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:46,520 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:50:46,521 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:50:46,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:50:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:50:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 22:50:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:50:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 22:50:46,526 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 22:50:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:46,526 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 22:50:46,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:50:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 22:50:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:50:46,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:46,527 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:46,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 22:50:46,527 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:46,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2021-05-02 22:50:46,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:46,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594387941] [2021-05-02 22:50:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:46,535 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:46,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671510205] [2021-05-02 22:50:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:46,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:50:46,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:50:46,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:46,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594387941] [2021-05-02 22:50:46,741 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:46,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671510205] [2021-05-02 22:50:46,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671510205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:46,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:46,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:50:46,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203925861] [2021-05-02 22:50:46,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:50:46,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:46,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:50:46,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:50:46,743 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:50:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:46,851 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 22:50:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:50:46,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 22:50:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:46,852 INFO L225 Difference]: With dead ends: 38 [2021-05-02 22:50:46,852 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:50:46,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:50:46,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:50:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:50:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:50:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 22:50:46,856 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2021-05-02 22:50:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:46,856 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 22:50:46,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:50:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 22:50:46,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:50:46,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:46,857 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] [2021-05-02 22:50:47,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:47,069 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:47,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2021-05-02 22:50:47,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:47,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707399751] [2021-05-02 22:50:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:47,089 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:47,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869260939] [2021-05-02 22:50:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:47,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:50:47,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:47,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:47,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:47,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:47,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:47,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:47,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:47,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:47,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:50:47,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:47,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707399751] [2021-05-02 22:50:47,248 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:47,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869260939] [2021-05-02 22:50:47,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869260939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:47,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:47,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:50:47,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864905212] [2021-05-02 22:50:47,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:50:47,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:47,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:50:47,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:50:47,250 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:50:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:47,278 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 22:50:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:50:47,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 22:50:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:47,279 INFO L225 Difference]: With dead ends: 37 [2021-05-02 22:50:47,279 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 22:50:47,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:50:47,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 22:50:47,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 22:50:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:50:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 22:50:47,282 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 30 [2021-05-02 22:50:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:47,282 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 22:50:47,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:50:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 22:50:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 22:50:47,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:47,283 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:47,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:47,493 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:47,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:47,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1698187712, now seen corresponding path program 1 times [2021-05-02 22:50:47,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:47,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381580770] [2021-05-02 22:50:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:47,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:47,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890529879] [2021-05-02 22:50:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:50:47,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:50:47,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:50:47,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:47,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381580770] [2021-05-02 22:50:47,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:47,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890529879] [2021-05-02 22:50:47,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890529879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:47,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:47,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:50:47,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324271087] [2021-05-02 22:50:47,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:50:47,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:47,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:50:47,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:50:47,645 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:50:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:47,697 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-05-02 22:50:47,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:50:47,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 22:50:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:47,699 INFO L225 Difference]: With dead ends: 48 [2021-05-02 22:50:47,699 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:50:47,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:50:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:50:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:50:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:50:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-05-02 22:50:47,710 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 30 [2021-05-02 22:50:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:47,710 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-05-02 22:50:47,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:50:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-05-02 22:50:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 22:50:47,714 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:47,714 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:47,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:47,914 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:47,915 INFO L82 PathProgramCache]: Analyzing trace with hash 888200606, now seen corresponding path program 2 times [2021-05-02 22:50:47,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:47,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774844240] [2021-05-02 22:50:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:47,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:47,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364275455] [2021-05-02 22:50:47,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:47,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:50:47,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:50:47,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:50:47,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:48,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:50:48,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:48,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774844240] [2021-05-02 22:50:48,087 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:48,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364275455] [2021-05-02 22:50:48,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364275455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:48,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:48,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:50:48,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531379754] [2021-05-02 22:50:48,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:50:48,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:50:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:50:48,089 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:50:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:48,224 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-05-02 22:50:48,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:50:48,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 22:50:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:48,225 INFO L225 Difference]: With dead ends: 52 [2021-05-02 22:50:48,226 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:50:48,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:50:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:50:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 22:50:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:50:48,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-05-02 22:50:48,229 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-05-02 22:50:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:48,229 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-05-02 22:50:48,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:50:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-05-02 22:50:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 22:50:48,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:48,230 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:48,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:48,445 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2014164963, now seen corresponding path program 2 times [2021-05-02 22:50:48,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:48,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276001272] [2021-05-02 22:50:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:48,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:48,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313574123] [2021-05-02 22:50:48,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:48,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:50:48,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:50:48,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:50:48,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:48,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 22:50:48,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:48,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276001272] [2021-05-02 22:50:48,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:48,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313574123] [2021-05-02 22:50:48,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313574123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:48,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:48,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:50:48,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499072387] [2021-05-02 22:50:48,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:50:48,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:48,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:50:48,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:50:48,645 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:50:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:48,752 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-05-02 22:50:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:50:48,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-02 22:50:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:48,753 INFO L225 Difference]: With dead ends: 51 [2021-05-02 22:50:48,753 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:50:48,754 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:50:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:50:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 22:50:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:50:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-05-02 22:50:48,757 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2021-05-02 22:50:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:48,757 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-05-02 22:50:48,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:50:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-05-02 22:50:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 22:50:48,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:48,758 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:48,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:48,973 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2015237439, now seen corresponding path program 3 times [2021-05-02 22:50:48,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:48,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519515288] [2021-05-02 22:50:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:48,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:48,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766418333] [2021-05-02 22:50:48,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:49,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:50:49,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:50:49,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 22:50:49,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 22:50:49,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:49,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519515288] [2021-05-02 22:50:49,153 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:49,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766418333] [2021-05-02 22:50:49,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766418333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:49,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:49,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:50:49,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421231261] [2021-05-02 22:50:49,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:50:49,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:49,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:50:49,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:50:49,154 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 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) [2021-05-02 22:50:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:49,221 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-02 22:50:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:50:49,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 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 48 [2021-05-02 22:50:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:49,227 INFO L225 Difference]: With dead ends: 62 [2021-05-02 22:50:49,227 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 22:50:49,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:50:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 22:50:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-05-02 22:50:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:50:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-05-02 22:50:49,231 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 48 [2021-05-02 22:50:49,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:49,231 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-05-02 22:50:49,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 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) [2021-05-02 22:50:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-05-02 22:50:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 22:50:49,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:50:49,233 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:50:49,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:49,445 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:50:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:50:49,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1772710271, now seen corresponding path program 4 times [2021-05-02 22:50:49,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:50:49,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664093986] [2021-05-02 22:50:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:50:49,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:50:49,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20927315] [2021-05-02 22:50:49,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:50:49,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:50:49,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:50:49,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:50:49,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:50:49,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:49,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:50:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 22:50:49,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:50:49,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664093986] [2021-05-02 22:50:49,645 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:50:49,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20927315] [2021-05-02 22:50:49,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20927315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:50:49,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:50:49,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:50:49,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092786736] [2021-05-02 22:50:49,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:50:49,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:50:49,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:50:49,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:50:49,646 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 22:50:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:50:49,728 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-05-02 22:50:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:50:49,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-02 22:50:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:50:49,729 INFO L225 Difference]: With dead ends: 58 [2021-05-02 22:50:49,729 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:50:49,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:50:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:50:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:50:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 22:50:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:50:49,730 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2021-05-02 22:50:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:50:49,730 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:50:49,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 22:50:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:50:49,730 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:50:49,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:50:49,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:50:49 BasicIcfg [2021-05-02 22:50:49,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:50:49,948 INFO L168 Benchmark]: Toolchain (without parser) took 4991.67 ms. Allocated memory was 255.9 MB in the beginning and 328.2 MB in the end (delta: 72.4 MB). Free memory was 221.1 MB in the beginning and 264.1 MB in the end (delta: -43.0 MB). Peak memory consumption was 30.2 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:49,949 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.6 MB in the end (delta: 86.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:50:49,949 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.92 ms. Allocated memory is still 255.9 MB. Free memory was 220.8 MB in the beginning and 210.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:49,949 INFO L168 Benchmark]: Boogie Preprocessor took 50.72 ms. Allocated memory is still 255.9 MB. Free memory was 210.9 MB in the beginning and 238.9 MB in the end (delta: -28.0 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:49,949 INFO L168 Benchmark]: RCFGBuilder took 319.67 ms. Allocated memory is still 255.9 MB. Free memory was 238.5 MB in the beginning and 224.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:49,949 INFO L168 Benchmark]: IcfgTransformer took 19.36 ms. Allocated memory is still 255.9 MB. Free memory was 224.2 MB in the beginning and 222.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:49,949 INFO L168 Benchmark]: TraceAbstraction took 4445.56 ms. Allocated memory was 255.9 MB in the beginning and 328.2 MB in the end (delta: 72.4 MB). Free memory was 222.4 MB in the beginning and 264.1 MB in the end (delta: -41.6 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:50:49,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.6 MB in the end (delta: 86.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 150.92 ms. Allocated memory is still 255.9 MB. Free memory was 220.8 MB in the beginning and 210.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.72 ms. Allocated memory is still 255.9 MB. Free memory was 210.9 MB in the beginning and 238.9 MB in the end (delta: -28.0 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 319.67 ms. Allocated memory is still 255.9 MB. Free memory was 238.5 MB in the beginning and 224.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.36 ms. Allocated memory is still 255.9 MB. Free memory was 224.2 MB in the beginning and 222.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4445.56 ms. Allocated memory was 255.9 MB in the beginning and 328.2 MB in the end (delta: 72.4 MB). Free memory was 222.4 MB in the beginning and 264.1 MB in the end (delta: -41.6 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4401.9ms, OverallIterations: 10, TraceHistogramMax: 8, EmptinessCheckTime: 19.0ms, AutomataDifference: 1088.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 272 SDtfs, 88 SDslu, 752 SDs, 0 SdLazy, 560 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 543.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 287 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 584.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=9, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 55.6ms AutomataMinimizationTime, 10 MinimizatonAttempts, 7 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 65.2ms SsaConstructionTime, 188.4ms SatisfiabilityAnalysisTime, 1158.8ms InterpolantComputationTime, 296 NumberOfCodeBlocks, 276 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 1017 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1042 ConjunctsInSsa, 120 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 253/357 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...