/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/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:54:54,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:54:54,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:54:54,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:54:54,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:54:54,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:54:54,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:54:54,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:54:54,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:54:54,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:54:54,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:54:54,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:54:54,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:54:54,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:54:54,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:54:54,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:54:54,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:54:54,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:54:54,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:54:54,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:54:54,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:54:54,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:54:54,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:54:54,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:54:54,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:54:54,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:54:54,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:54:54,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:54:54,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:54:54,310 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:54:54,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:54:54,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:54:54,312 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:54:54,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:54:54,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:54:54,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:54:54,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:54:54,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:54:54,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:54:54,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:54:54,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:54:54,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:54:54,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:54:54,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:54:54,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:54:54,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:54:54,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:54:54,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:54:54,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:54:54,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:54:54,316 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:54:54,316 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:54:54,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:54:54,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:54:54,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:54:54,620 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:54:54,620 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:54:54,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2021-05-02 18:54:54,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6df1ce2/0e594fd4e03f47fd98244631da732b31/FLAG0196ca89a [2021-05-02 18:54:55,046 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:54:55,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2021-05-02 18:54:55,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6df1ce2/0e594fd4e03f47fd98244631da732b31/FLAG0196ca89a [2021-05-02 18:54:55,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6df1ce2/0e594fd4e03f47fd98244631da732b31 [2021-05-02 18:54:55,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:54:55,465 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:54:55,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:54:55,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:54:55,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:54:55,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:54:55" (1/1) ... [2021-05-02 18:54:55,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205fdfa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55, skipping insertion in model container [2021-05-02 18:54:55,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:54:55" (1/1) ... [2021-05-02 18:54:55,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:54:55,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:54:55,586 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c[403,416] [2021-05-02 18:54:55,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:54:55,603 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:54:55,613 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c[403,416] [2021-05-02 18:54:55,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:54:55,628 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:54:55,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55 WrapperNode [2021-05-02 18:54:55,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:54:55,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:54:55,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:54:55,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:54:55,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55" (1/1) ... [2021-05-02 18:54:55,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55" (1/1) ... [2021-05-02 18:54:55,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55" (1/1) ... [2021-05-02 18:54:55,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55" (1/1) ... [2021-05-02 18:54:55,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55" (1/1) ... [2021-05-02 18:54:55,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55" (1/1) ... [2021-05-02 18:54:55,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55" (1/1) ... [2021-05-02 18:54:55,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:54:55,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:54:55,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:54:55,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:54:55,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55" (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 18:54:55,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:54:55,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:54:55,760 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:54:55,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:54:55,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:54:55,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:54:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:54:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:54:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:54:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:54:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:54:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:54:55,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 18:54:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:54:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:54:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:54:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:54:55,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:54:55,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:54:55,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:54:56,048 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:54:56,048 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:54:56,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:54:56 BoogieIcfgContainer [2021-05-02 18:54:56,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:54:56,050 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:54:56,050 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:54:56,051 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:54:56,053 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:54:56" (1/1) ... [2021-05-02 18:54:56,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:54:56 BasicIcfg [2021-05-02 18:54:56,083 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:54:56,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:54:56,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:54:56,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:54:56,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:54:55" (1/4) ... [2021-05-02 18:54:56,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf0bcee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:54:56, skipping insertion in model container [2021-05-02 18:54:56,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:54:55" (2/4) ... [2021-05-02 18:54:56,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf0bcee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:54:56, skipping insertion in model container [2021-05-02 18:54:56,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:54:56" (3/4) ... [2021-05-02 18:54:56,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf0bcee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:54:56, skipping insertion in model container [2021-05-02 18:54:56,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:54:56" (4/4) ... [2021-05-02 18:54:56,106 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt4.cJordan [2021-05-02 18:54:56,111 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:54:56,113 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:54:56,155 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:54:56,178 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:54:56,178 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:54:56,179 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:54:56,179 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:54:56,179 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:54:56,179 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:54:56,179 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:54:56,179 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:54:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:54:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:54:56,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:56,194 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:56,194 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:56,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:56,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2028912826, now seen corresponding path program 1 times [2021-05-02 18:54:56,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:56,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125015973] [2021-05-02 18:54:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:56,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:56,452 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 18:54:56,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:56,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125015973] [2021-05-02 18:54:56,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125015973] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:54:56,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:54:56,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:54:56,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556873195] [2021-05-02 18:54:56,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:54:56,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:56,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:54:56,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:54:56,470 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 18:54:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:56,520 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-05-02 18:54:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:54:56,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 18:54:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:56,531 INFO L225 Difference]: With dead ends: 24 [2021-05-02 18:54:56,531 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 18:54:56,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:54:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 18:54:56,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 18:54:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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 18:54:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-05-02 18:54:56,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2021-05-02 18:54:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:56,559 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-05-02 18:54:56,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 18:54:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-05-02 18:54:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:54:56,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:56,560 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:56,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:54:56,561 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2027989305, now seen corresponding path program 1 times [2021-05-02 18:54:56,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:56,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189098447] [2021-05-02 18:54:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:56,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:56,865 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 18:54:56,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:56,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189098447] [2021-05-02 18:54:56,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189098447] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:54:56,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:54:56,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:54:56,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140629222] [2021-05-02 18:54:56,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:54:56,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:56,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:54:56,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:54:56,868 INFO L87 Difference]: Start difference. First operand 17 states and 20 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 18:54:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:57,091 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-05-02 18:54:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:54:57,092 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 18:54:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:57,092 INFO L225 Difference]: With dead ends: 22 [2021-05-02 18:54:57,092 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 18:54:57,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:54:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 18:54:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 18:54:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 18:54:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-05-02 18:54:57,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2021-05-02 18:54:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:57,097 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-05-02 18:54:57,097 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 18:54:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-05-02 18:54:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:54:57,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:57,098 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:57,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:54:57,098 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:57,098 INFO L82 PathProgramCache]: Analyzing trace with hash -169964717, now seen corresponding path program 1 times [2021-05-02 18:54:57,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:57,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157740228] [2021-05-02 18:54:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:57,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:57,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:57,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157740228] [2021-05-02 18:54:57,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157740228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:57,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938248461] [2021-05-02 18:54:57,499 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 18:54:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:57,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 18:54:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:57,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938248461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:57,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:57,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-05-02 18:54:57,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075588734] [2021-05-02 18:54:57,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:54:57,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:54:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:54:57,787 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:58,165 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-02 18:54:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:54:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 18:54:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:58,166 INFO L225 Difference]: With dead ends: 27 [2021-05-02 18:54:58,167 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 18:54:58,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 600.4ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-02 18:54:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 18:54:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 18:54:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 18:54:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 18:54:58,173 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-05-02 18:54:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:58,174 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 18:54:58,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 18:54:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 18:54:58,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:58,175 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:58,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:54:58,389 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:58,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1344763700, now seen corresponding path program 1 times [2021-05-02 18:54:58,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:58,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299756283] [2021-05-02 18:54:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:58,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:58,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:58,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299756283] [2021-05-02 18:54:58,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299756283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:58,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472132580] [2021-05-02 18:54:58,828 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 18:54:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 18:54:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:54:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472132580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:59,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:59,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-05-02 18:54:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828106222] [2021-05-02 18:54:59,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 18:54:59,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:59,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 18:54:59,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:54:59,084 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:59,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:59,611 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 18:54:59,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 18:54:59,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 18:54:59,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:59,613 INFO L225 Difference]: With dead ends: 32 [2021-05-02 18:54:59,613 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 18:54:59,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 724.4ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:54:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 18:54:59,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 18:54:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 18:54:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-05-02 18:54:59,622 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2021-05-02 18:54:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:59,622 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-05-02 18:54:59,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:54:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-05-02 18:54:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 18:54:59,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:59,624 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:59,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:54:59,837 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1658268750, now seen corresponding path program 1 times [2021-05-02 18:54:59,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:59,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086647913] [2021-05-02 18:54:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:00,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:55:00,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:00,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086647913] [2021-05-02 18:55:00,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086647913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:00,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393858091] [2021-05-02 18:55:00,135 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 18:55:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:00,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 18:55:00,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:00,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:55:00,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393858091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:00,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:00,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-05-02 18:55:00,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746414849] [2021-05-02 18:55:00,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 18:55:00,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:00,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 18:55:00,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-02 18:55:00,429 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:55:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:00,900 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 18:55:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 18:55:00,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 18:55:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:00,905 INFO L225 Difference]: With dead ends: 36 [2021-05-02 18:55:00,906 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 18:55:00,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 617.6ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-02 18:55:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 18:55:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 18:55:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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 18:55:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 18:55:00,909 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2021-05-02 18:55:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:00,909 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 18:55:00,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:55:00,910 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 18:55:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 18:55:00,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:00,910 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:01,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:01,129 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash 946418512, now seen corresponding path program 1 times [2021-05-02 18:55:01,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:01,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792367763] [2021-05-02 18:55:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:01,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:55:01,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:01,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792367763] [2021-05-02 18:55:01,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792367763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:01,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882012746] [2021-05-02 18:55:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:01,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 18:55:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:01,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:01,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:01,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:01,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:01,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:55:02,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882012746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:02,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:02,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-05-02 18:55:02,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228918850] [2021-05-02 18:55:02,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 18:55:02,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:02,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 18:55:02,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-05-02 18:55:02,050 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:55:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:02,968 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 18:55:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 18:55:02,969 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 18:55:02,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:02,970 INFO L225 Difference]: With dead ends: 39 [2021-05-02 18:55:02,970 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 18:55:02,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1201.0ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 18:55:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 18:55:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 18:55:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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 18:55:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-02 18:55:02,974 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2021-05-02 18:55:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:02,974 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-02 18:55:02,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 21 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:55:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-02 18:55:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 18:55:02,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:02,975 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:03,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:03,197 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:03,198 INFO L82 PathProgramCache]: Analyzing trace with hash 943027754, now seen corresponding path program 2 times [2021-05-02 18:55:03,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:03,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121489791] [2021-05-02 18:55:03,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:03,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:55:03,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:03,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121489791] [2021-05-02 18:55:03,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121489791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:03,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692123630] [2021-05-02 18:55:03,790 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 18:55:03,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:55:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:55:03,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 18:55:03,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:04,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:55:04,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692123630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:04,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:04,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2021-05-02 18:55:04,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11309699] [2021-05-02 18:55:04,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 18:55:04,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:04,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 18:55:04,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-05-02 18:55:04,374 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:55:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:06,037 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-05-02 18:55:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 18:55:06,038 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 18:55:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:06,038 INFO L225 Difference]: With dead ends: 50 [2021-05-02 18:55:06,039 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 18:55:06,040 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1961.4ms TimeCoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 18:55:06,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 18:55:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-05-02 18:55:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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 18:55:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-02 18:55:06,043 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 32 [2021-05-02 18:55:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:06,043 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-02 18:55:06,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 27 states have internal predecessors, (52), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:55:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-02 18:55:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 18:55:06,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:06,045 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:06,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 18:55:06,261 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:06,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:06,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1668775163, now seen corresponding path program 3 times [2021-05-02 18:55:06,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:06,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670050931] [2021-05-02 18:55:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:06,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:55:06,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:06,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670050931] [2021-05-02 18:55:06,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670050931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:06,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799105335] [2021-05-02 18:55:06,382 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 18:55:06,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 18:55:06,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:55:06,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 18:55:06,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:06,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 18:55:06,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799105335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:06,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:06,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-05-02 18:55:06,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624641877] [2021-05-02 18:55:06,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:55:06,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:06,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:55:06,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:55:06,754 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:55:09,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:09,607 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-05-02 18:55:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 18:55:09,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 18:55:09,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:09,609 INFO L225 Difference]: With dead ends: 66 [2021-05-02 18:55:09,609 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 18:55:09,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 570.7ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:55:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 18:55:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-05-02 18:55:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 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 18:55:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-05-02 18:55:09,615 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2021-05-02 18:55:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:09,615 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-05-02 18:55:09,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:55:09,615 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-05-02 18:55:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 18:55:09,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:09,616 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:09,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:09,819 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:09,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1658641805, now seen corresponding path program 4 times [2021-05-02 18:55:09,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:09,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119631563] [2021-05-02 18:55:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:10,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:55:10,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:10,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119631563] [2021-05-02 18:55:10,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119631563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:10,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754342533] [2021-05-02 18:55:10,703 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 18:55:10,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 18:55:10,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:55:10,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 18:55:10,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:55:11,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:11,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:11,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:11,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:11,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:11,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:55:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:55:11,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754342533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:11,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:55:11,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 36 [2021-05-02 18:55:11,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172429267] [2021-05-02 18:55:11,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 18:55:11,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:55:11,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 18:55:11,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 18:55:11,702 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 36 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:55:13,243 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-05-02 18:55:13,393 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-05-02 18:55:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:55:13,777 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-05-02 18:55:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 18:55:13,777 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-02 18:55:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:55:13,778 INFO L225 Difference]: With dead ends: 69 [2021-05-02 18:55:13,778 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 18:55:13,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2768.7ms TimeCoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 18:55:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 18:55:13,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-05-02 18:55:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 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 18:55:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-05-02 18:55:13,783 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 41 [2021-05-02 18:55:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:55:13,784 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-05-02 18:55:13,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 33 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:55:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-05-02 18:55:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 18:55:13,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:55:13,785 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:55:13,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:55:13,993 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:55:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:55:13,994 INFO L82 PathProgramCache]: Analyzing trace with hash 109958734, now seen corresponding path program 5 times [2021-05-02 18:55:13,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:55:13,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986891315] [2021-05-02 18:55:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:55:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:15,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:55:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:55:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:55:15,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:55:15,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986891315] [2021-05-02 18:55:15,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986891315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:55:15,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928758952] [2021-05-02 18:55:15,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true